CN104009831B

CN104009831B - User's dedicated demodulation reference signal transmits and data demodulation method and equipment

Info

Publication number: CN104009831B
Application number: CN201310057622.3A
Authority: CN
Inventors: 高雪娟; 林亚男; 沈祖康
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-02-22
Filing date: 2013-02-22
Publication date: 2017-12-01
Anticipated expiration: 2033-02-22
Also published as: CN104009831A

Abstract

The embodiment of the invention discloses a kind of transmission of user's dedicated demodulation reference signal and data demodulation method and equipment, it is related to wireless communication field, for improving resource utilization.In the present invention, different from the RE transmission DM RS in one or two OFDM symbol of OFDM symbol where synchronous transmission of signal in top n OFDM symbol in subframe, so as to avoid the problem of DM RS mapping resources are overlapping with synchronizing signal mapping resource, and then avoid in synchronous transmission of signal subframe, the problem of can not transmitting downlink data in part PRB among system bandwidth, so as to improve resource utilization.

Description

User's dedicated demodulation reference signal transmits and data demodulation method and equipment

Technical field

The present invention relates to wireless communication field, more particularly to a kind of transmission of user's dedicated demodulation reference signal and data demodulation Method and apparatus.

Background technology

In order to reduce overhead, resource utilization is improved, is strengthened in Long Term Evolution（Long Term Evolution- Advance, LTE-A）System version -11（Release11, Rel-11）Defined in a kind of new wave-carring type（New Carrier Type, NCT）.On NCT, in the absence of tradition（legacy）Control area, downlink data can in a subframe it is all just Hand over frequency division multiplexing（Orthogonal Frequency Division Multiplexing, OFDM）Transmit, and be based on symbol User equipment（User Equipment, UE）Special demodulated reference signal（DeModulation Reference Signal, DM-RS）It is demodulated；And in order to improve NCT resource utilization, it need to support in the Physical Resource Block where synchronous transmission of signal （Physical Resource Block, PRB）Middle simultaneous transmission DM-RS and the downlink data being demodulated based on DM-RS.

On Legacy carrier waves（I.e. non-NCT carrier waves）, by the OFDM symbol in a descending sub frame be divided into control area and Data area two parts, control area are the top n OFDM symbol of the descending sub frame, as shown in Figure 1.Wherein, the possible values of N For 1,2,3,4, and N=4 are only applicable to the carrier wave that system bandwidth is 1.4MHz, for time division duplex（Time Division Duplex, TDD）Special subframe, N are only capable of value 1 or 2.

Synchronizing signal includes master sync signal（Primary Synchronized Signal, PSS）And auxiliary synchronous signals （Secondary Synchronization Signal, SSS）.In frequency domain, PSS and SSS are only mapped to 72 among bandwidth On subcarrier.In time domain, for FDD（Frequency Division Duplex, FDD）System, PSS are mapped to time slot 0（That is first time slot of subframe 0）With time slot 10（That is first time slot of subframe 5）Last OFDM symbol on, SSS It is mapped in the penultimate OFDM symbol of time slot 0 and time slot 10, as shown in Figure 2 a；For TDD system, PSS is mapped to son In the 3rd OFDM symbol in frame 1 and 6（I.e. in the TDD uplink/downlink configuration of 5ms up-downgoing switching points, subframe 1 and 6 is all Special subframe；In the TDD uplink/downlink configuration of 10ms up-downgoing switching points, only subframe 1 is special subframe；For special subframe, That is PSS is mapped in the descending pilot frequency time slot included in special subframe（Downlink Pilot Time Slot, DwPTS） In three OFDM symbols）, SSS is mapped to time slot 1（That is second time slot of subframe 0）With time slot 11（That is at second of subframe 5 Gap）Last OFDM symbol on, as shown in Figure 2 b.

The special DM-RS of UE can support 1 ~ 8 antenna port to transmit.DM-RS is only in Physical Downlink Shared Channel（hysical Downlink Shared Channel, PDSCH）Sent on PRB where transmitting, to reduce reference symbol expense, save energy Interference between amount, reduction neighbor cell.Fig. 3 a（Conventional cyclic prefix（Cyclic Prefix, CP）Under）With Fig. 3 b（Extend CP Under）Resource mapping methods of the DM-RS in units of a PRB pair is shown, wherein, DM-RS is in antenna port 7/8/11/ Mapping resource on 13 is identical, and the mapping resource on antenna port 9/10/12/14 is identical, passes through the time domain in Tables 1 and 2 Orthogonal sequence come ensure using same map resource antenna port DM-RS between orthogonality.Extend under CP, DM-RS is only Support 2 antenna ports.In addition, for the special subframe that DwPTS length in TDD system is 3 OFDM symbols（I.e. descending conventional CP Under, DwPTS 6592T_sSpecial subframe, under downbound expansion CP, DwPTS 7680T_sSpecial subframe, wherein T_sTo be System uses time interval）, i.e. special subframe is corresponded to during conventional CP and matches somebody with somebody the special subframe set to 0 with 5, and corresponded to during extension CP it is special The special subframe of sub-frame configuration 0 and 4, does not support DM-RS to transmit.

Table 1：Under conventional CP, the DM-RS orthogonal sequences of different antennae port

Table 2：Extend under CP, the DM-RS orthogonal sequences of different antennae port

According to above-mentioned DM-RS and synchronizing signal mapping position, when in the subframe where synchronous transmission of signal（For FDD It is subframe 0,1,5,6 for TDD for subframe 0 and 5）, the special DM-RS of UE mapping resource and the mapping resource of synchronizing signal are deposited Overlapping, therefore, in these subframes, in the PRB pair that synchronizing signal mapping resource be present（pair）In（I.e. among system bandwidth 6 PRB in）DM-RS and the downlink data based on DM-RS demodulation are not transmitted.

In order to further improve resource utilization ratio, Long Term Evolution enhancing（Long Term Evolution- Advance, LTE-A）System version -12（Release11, Rel-12）It is determined that introduce new wave-carring type（New Carrier Type, NCT）, with the strengthening system availability of frequency spectrum, preferably support heterogeneous network, reduction power consumption.At present on NCT：It is not present Legacy control areas, PDSCH can be transmitted in all OFDM symbols in a descending sub frame, for TDD special subframes, It can then be transmitted in all OFDM symbols for downlink transfer；NCT is upper only to be supported to be solved based on the special DM-RS of UE at present The downlink transfer of tune, due in the absence of legacy control areas, also being passed in the absence of original on legacy carrier waves in control area Defeated physical down channel, such as legacy Physical Downlink Control Channel（Physical Downlink Control Channel, PDCCH）Deng then the PDSCH on NCT can only be by the enhancing Physical Downlink Control Channel that is transmitted on NCT（Enhanced Physical Downlink Control CHannel, E-PDCCH）To dispatch, or can also be gathered by carrying out carrier wave with NCT Close（Carrier Aggregation, CA）Legacy carrier waves on the PDCCH/E-PDCCH that transmits carry out cross-carrier scheduling, its The downlink transfers such as PDSCH and E-PDCCH on middle NCT are required for being demodulated based on the special DM-RS of UE；E-PDCCH with The legacy PDCCH main distinction is that E-PDCCH is transmitted with PDSCH frequency division multiplexings, and therefore, the E-PDCCH on NCT also may be used To be transmitted on all OFDM symbols for downlink transfer, its transmission structure is as shown in Figure 4；In addition, NCT is only supported at present In single antenna port（Antenna port p=0）On using 5ms as the exclusive pilot signal of periodic transfer cell（Cell-specific Reference signals, CRS）, and CRS is only used for measuring and tracked, and is not used in demodulation.

NCT can be divided into synchronous NCT and asynchronous NCT；For synchronous NCT, it is impossible to work independently, it is necessary to legacy carrier waves It polymerize work, it is believed that NCT synchronizing information is consistent with the legacy carrier waves polymerizeing, and synchronizing information can obtain from legacy carrier waves Take, naturally it is also possible to obtained according to the synchronizing signal that is sent on NCT of detection；For asynchronous NCT, it is necessary to be existed by detection The synchronizing signal that is sent on NCT obtains synchronization；At least need synchronous transmission of signal be present thereon for asynchronous NCT.

To sum up, the resource mapping method of the special DM-RS of UE defined in Rel-10, in synchronous transmission of signal subframe, all The problem of DM-RS mapping resources are overlapping with synchronizing signal mapping subframe be present.If according to the special DM-RS resources of Rel-10 UE Mapping mode, in synchronous transmission of signal subframe, downlink data can not be transmitted in 6 PRB among NCT system bandwidth, Reduce NCT resource utilization.

The content of the invention

The embodiment of the present invention provides a kind of user's dedicated demodulation reference signal transmission and data demodulation method and equipment, is used for Improve resource utilization.

A kind of user's dedicated demodulation reference signal DM-RS transmission methods, this method include：

Network side determines to be used for the physical resource for transmitting DM-RS in present sub-frame；

Network side, respectively will be each in present sub-frame according to the DM-RS resource mapping methods of each DM-RS antenna port DM-RS corresponding to DM-RS antenna port is mapped to the DM-RS antenna port in the physical resource for being used to transmit DM-RS On corresponding DM-RS resource units RE, DM-RS RE corresponding to each DM-RS antenna port are the top n in the subframe Where being different from synchronous transmission of signal in orthogonal frequency division multiplex OFDM symbol in one or two OFDM symbol of OFDM symbol RE；Wherein N is the integer not less than 1；

Network side is used for the physical resource for transmitting DM-RS in the burst, by being used to transmit DM-RS's in the subframe Antenna port to terminal send resource impact after DM-RS.

A kind of data demodulation method, this method include：

Terminal determines to be used for the physical resource for transmitting user's dedicated demodulation reference signal DM-RS in present sub-frame；

Terminal is each in present sub-frame respectively according to the DM-RS resource mapping methods of each DM-RS antenna port DM-RS antenna port it is described for transmit DM-RS physical resource on corresponding DM-RS resource units RE on obtain the DM- DM-RS corresponding to RS antenna ports, DM-RS RE corresponding to each DM-RS antenna port be top n in the subframe just Hand over the RE in one or two OFDM symbol of OFDM symbol where being different from synchronous transmission of signal in frequency division multiplex OFDM symbol； Wherein N is the integer not less than 1 and no more than 6；

Terminal DM-RS according to corresponding to each DM-RS antenna port, to the downlink data received on respective antenna port It is demodulated.

A kind of base station, the base station include：

Transfer resource determining unit, for determining to be used for the physical resource for transmitting DM-RS in present sub-frame；

DM-RS map units, respectively will be current for the DM-RS resource mapping methods according to each DM-RS antenna port DM-RS corresponding to each DM-RS antenna port in subframe is mapped to the DM-RS antenna port and is used to transmit DM-RS described Physical resource on corresponding DM-RS resource units RE, DM-RS RE corresponding to each DM-RS antenna port are the son One or two of OFDM symbol where being different from synchronous transmission of signal in top n orthogonal frequency division multiplex OFDM symbol in frame RE in OFDM symbol；Wherein N is the integer not less than 1；

Transmission unit, for the physical resource for being used to transmit DM-RS in the burst, by being used to transmit in the subframe DM-RS antenna port to terminal send resource impact after DM-RS.

A kind of terminal, the terminal include：

DM-RS acquiring units, for the DM-RS resource mapping methods according to each DM-RS antenna port, respectively current Each DM-RS antenna port in subframe it is described for transmit DM-RS physical resource on corresponding DM-RS resource units RE DM-RS corresponding to upper acquisition DM-RS antenna port, DM-RS RE corresponding to each DM-RS antenna port are the subframe In top n orthogonal frequency division multiplex OFDM symbol in be different from synchronous transmission of signal where OFDM symbol one or two OFDM RE on symbol；Wherein N is the integer not less than 1 and no more than 6；

Demodulating unit, for the DM-RS according to corresponding to each DM-RS antenna port, to being received on respective antenna port Downlink data be demodulated.

In scheme provided in an embodiment of the present invention, network side determines to be used for the physical resource for transmitting DM-RS in present sub-frame, According to the DM-RS resource mapping methods of each DM-RS antenna port, respectively by each DM-RS antenna port in present sub-frame Corresponding DM-RS is mapped to the DM-RS antenna port corresponding DM-RS RE on the physical resource for transmitting DM-RS, And be used to transmit DM-RS physical resource in the burst, by being used to transmitting DM-RS antenna port in the subframe to end End sends the DM-RS after resource impact；Terminal determines to be used to transmit user's dedicated demodulation reference signal DM-RS's in present sub-frame Physical resource, according to the DM-RS resource mapping methods of each DM-RS antenna port, each DM-RS in present sub-frame respectively Antenna port is obtained corresponding to the DM-RS antenna port on the corresponding DM-RS RE on the physical resource for transmitting DM-RS DM-RS, and the DM-RS according to corresponding to each DM-RS antenna port, the downlink data received on respective antenna port is carried out Demodulation.Wherein, DM-RS RE corresponding to each DM-RS antenna port are to be different from together in the top n OFDM symbol in the subframe RE where walking signal transmission in one or two OFDM symbol of OFDM symbol, so as to avoid DM-RS mapping resources with it is same The problem of signal mapping resource is overlapping is walked, and then is avoided in synchronous transmission of signal subframe, 6 among system bandwidth The problem of downlink data can not be transmitted in PRB, so as to improve resource utilization.

Brief description of the drawings

Fig. 1 is the multiplexing relation schematic diagram of carrier Control region of the prior art and data area；

Fig. 2 a are the synchronizing signal mapping position schematic diagram in FDD system in the prior art；

Fig. 2 b are the synchronizing signal mapping position schematic diagram in TDD system in the prior art；

Fig. 3 a are the DM-RS resource mapping method schematic diagrames under conventional CP in the prior art；

Fig. 3 b are to extend the DM-RS resource mapping method schematic diagrames under CP in the prior art；

The control area and the multiplexing relation schematic diagram of data area that Fig. 4 is NCT of the prior art；

Fig. 5 is method flow schematic diagram provided in an embodiment of the present invention；

Fig. 6 is another method schematic flow sheet provided in an embodiment of the present invention；

Fig. 7 a- Fig. 7 e are in the embodiment of the present invention under conventional CP, A=6,8 antenna port when DM-RS resource mapping methods Schematic diagram；

Fig. 8 a- Fig. 8 d are in the embodiment of the present invention under conventional CP, A=4,8 antenna port when DM-RS resource mapping methods Schematic diagram；

Fig. 9 a- Fig. 9 b are in the embodiment of the present invention under conventional CP, A=4,8 antenna port when DM-RS resource mapping methods Schematic diagram；

Figure 10 a- Figure 10 b are in the embodiment of the present invention under conventional CP, A=4,8 antenna port when DM-RS resource impact sides Formula schematic diagram；

Figure 11 a- Figure 11 d are in the embodiment of the present invention under conventional CP, A=2,8 antenna port when DM-RS resource impact sides Formula schematic diagram；

Figure 12 a- Figure 12 d are in the embodiment of the present invention under conventional CP, A=2,8 antenna port when DM-RS resource impact sides Formula schematic diagram；

Figure 13 a- Figure 13 d are in the embodiment of the present invention under conventional CP, A=3,8 antenna port when DM-RS resource impact sides Formula schematic diagram；

Figure 14 a- Figure 14 d are in the embodiment of the present invention under conventional CP, A=2,8 antenna port when DM-RS resource impact sides Formula schematic diagram；

Figure 15 a- Figure 15 b are in the embodiment of the present invention under conventional CP, A=2,8 antenna port when DM-RS resource impact sides Formula schematic diagram；

Figure 16 a- Figure 16 d are in the embodiment of the present invention under conventional CP, A=3,4 antenna port when DM-RS resource impact sides Formula schematic diagram；

Figure 17 a are in the embodiment of the present invention under conventional CP, A=4,4 antenna port when the signal of DM-RS resource mapping methods Figure；

Figure 17 b are in the embodiment of the present invention under conventional CP, A=6,4 antenna port when the signal of DM-RS resource mapping methods Figure；

Figure 18 a- Figure 18 c are in the embodiment of the present invention under conventional CP, A=4,2 antenna port when DM-RS resource impact sides Formula schematic diagram；

Figure 19 a- Figure 19 b are in the embodiment of the present invention under conventional CP, A=6,2 antenna port when DM-RS resource impact sides Formula schematic diagram；

Figure 20 is architecture of base station schematic diagram provided in an embodiment of the present invention；

Figure 21 is terminal structure schematic diagram provided in an embodiment of the present invention.

Embodiment

In order to improve resource utilization, the embodiment of the present invention, which provides a kind of special DM-RS transmission methods of user and one kind, to be made With the special DM-RS of user data demodulation method.

Referring to Fig. 5, the special DM-RS transmission methods of user provided in an embodiment of the present invention, comprise the following steps：

Step 50：Network side determines to be used for the physical resource for transmitting DM-RS in present sub-frame；Here, the physical resource has Body shows as Physical Resource Block pair（PRB pair）, i.e., network side configures or dispatch terminal receives the physical resource of downlink data, The downlink data includes the downlink data of the channel bearings such as PDSCH and E-PDCCH；

Step 51：Network side is according to the DM-RS resource mapping methods of each DM-RS antenna port, respectively by present sub-frame In each DM-RS antenna port corresponding to DM-RS be mapped to the DM-RS antenna port for transmit DM-RS physics provide Corresponding DM-RS resource units on source（RE）On, DM-RS RE corresponding to each DM-RS antenna port are the preceding N in the subframe Individual OFDM（OFDM）One or two OFDM symbol of OFDM symbol where being different from synchronous transmission of signal in symbol On RE；Wherein N is the integer not less than 1；

Step 52：Network side is used for the physical resource for transmitting DM-RS in the burst, by being used to transmit in the subframe DM-RS antenna port to terminal send resource impact after DM-RS.

Specifically, for conventional cyclic prefix（CP）, N maximum occurrences are 6；For extending CP, N maximum occurrences are 5； Or it is 3 for conventional CP and extension CP, N maximum occurrences.

Specifically, in time division duplex（TDD）In system, the subframe for transmitting DM-RS is to correspond to special subframe under conventional CP to match somebody with somebody 9 special subframe is put, or to correspond to the special subframe of special subframe configuration 7 under extension CP；Or transmit DM-RS subframe and be In FDD（FDD）Descending sub frame in system；Or in a tdd system, the subframe for transmitting DM-RS is right under conventional CP The special subframe of other special subframes configuration that should be in addition to special subframe configures 9, or remove special subframe to be corresponding under extension CP The special subframe of other special subframes configuration outside configuration 7；Or in a tdd system, the subframe for transmitting DM-RS is conventional The special subframe of any special subframe configuration is corresponded under CP, or to correspond to the special son of any special subframe configuration under extension CP Frame.

Further, if transmission DM-RS subframe is synchronous transmission of signal subframe, synchronizing signal in the burst the Transmitted in 3 OFDM symbols.The synchronizing signal can be master sync signal（PSS）.

Specifically, DM-RS RE corresponding to each DM-RS antenna port are different in the top n OFDM symbol in the subframe Where the synchronous transmission of signal during RE in two OFDM symbols of OFDM symbol, two OFDM symbols are continuous or non-company Continuous OFDM symbol；Preferably, when two OFDM symbols are continuous OFDM symbol, two OFDM symbols are current son The 1st OFDM symbol and the 2nd OFDM symbol in frame, or be the 4th OFDM symbol in present sub-frame and the 5th OFDM symbol Number, or be the 5th OFDM symbol and the 6th OFDM symbol in present sub-frame；It is discrete in two OFDM symbols During OFDM symbol, two OFDM symbols are the 2nd OFDM symbol and the 4th OFDM symbol in present sub-frame, or are current The 4th OFDM symbol and the 6th OFDM symbol in subframe, or in the 1st, 2,4,5,6 OFDM symbol in present sub-frame The discontinuous OFDM symbol of any two；

Or

DM-RS RE corresponding to each DM-RS antenna port are to be different from synchronously in the top n OFDM symbol in the subframe When signal transmits the RE in an OFDM symbol of place OFDM symbol, an OFDM symbol is the top n OFDM symbol In any one OFDM symbol in addition to the OFDM symbols where the synchronous transmission of signal.Preferably, an OFDM symbol is The 1st OFDM symbol, the 2nd OFDM symbol in present sub-frame, the 4th OFDM symbol, the 5th OFDM symbol, the 6th OFDM Any one in symbol.When extending under CP that N is maximum to be no more than 5, the situation comprising the 6th OFDM symbol is only applicable to routine CP, the situation not comprising the 6th OFDM symbol are applied to extension CP.

Specifically, DM-RS RE corresponding to each DM-RS antenna port, are right for transmitting DM-RS physical resource institute In the PRB pair set answered, each PRB pair included A number one that different subcarriers is mapped in DM-RS Or corresponding RE in two OFDM symbols, wherein A are the integer more than 1 and less than 12.

Specifically, when supporting maximum 8 DM-RS antenna ports, DM-RS RE are corresponding to each DM-RS antenna port Determine as follows：

8 DM-RS antenna ports are divided into 2 groups, each packet includes 4 DM-RS antenna ports, in same packet 4 DM-RS antenna ports correspond to identical DM-RS RE；For each packet, A numbering is determined in each PRB pair Different subcarriers, the subcarrier determined for different grouping are different；By the A subcarrier determined in each PRB pair in institute The DM-RS antenna port stated during corresponding RE is grouped as correspondence in one or two OFDM symbol is right in each PRB pair The DM-RS RE answered；Or

8 DM-RS antenna ports are divided into 4 groups, each packet includes 2 DM-RS antenna ports, in same packet 2 DM-RS antenna ports correspond to identical DM-RS RE；For each packet, A numbering is determined in each PRB pair Different subcarriers, the subcarrier determined for different grouping are different；By the A subcarrier determined in each PRB pair in institute The DM-RS antenna port stated during corresponding RE is grouped as correspondence in one or two OFDM symbol is right in each PRB pair The DM-RS RE answered.

Specifically, above-mentioned be divided into 2 groups by 8 DM-RS antenna ports, each packet includes 4 DM-RS antenna ports, 4 DM-RS antenna ports in same packet correspond to identical DM-RSRE；For each packet, in each PRB pair The different subcarrier of A numbering is determined, the subcarrier determined for different grouping is different；The A that will be determined in each PRB pair Individual subcarrier in one or two OFDM symbols corresponding RE as the DM-RS antenna port in corresponding be grouped each Corresponding DM-RS RE in PRB pair, it can specifically include following three example：

Example 1：

When A=6 and when DM-RS is mapped into two OFDM symbols：Corresponding to DM-RS antenna port in one packet DM-RS RE are in described two OFDM symbols in each PRB pair according to subcarrier number order from low to high 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE corresponding to upper；DM-RS antenna port in another packet Corresponding DM-RS RE are described two in each PRB pair according to subcarrier number order from low to high 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE corresponding in OFDM symbol；As shown in Fig. 7 a- Fig. 7 e；

Example 2：

When A=4 and when DM-RS is mapped into one or two OFDM symbol, DM-RS RE determination mode includes as follows Method 1 is to one in method 5：

Method 1：DM-RS RE corresponding to DM-RS antenna port in one packet be in each PRB pair according to The order of subcarrier number from low to high 12-b-a, 12-b+1-a corresponding in one or two OFDM symbols Individual, 12-b and the 12-b+1 RE；DM-RS RE corresponding to DM-RS antenna port in another packet are described every In individual PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to b Individual, b+1, b+a and the b+1+a RE；Wherein, as b=1, a=8 or 7 or 6 or 4 or 3 or 2, as b=2, a=6 Or 5 or 3 or 2, as b=3, a=4 or 2；

In this method, in the case of A=4, DM-RS are mapped to two OFDM symbols, corresponding diagram 8a- figures when b=1, a=8 8d；

For A=4, DM-RS is mapped to the situation of an OFDM symbol, as b=3, corresponding diagram 9a- Fig. 9 b during a=2；

For A=4, DM-RS is mapped to the situation of an OFDM symbol, as b=1, corresponding diagram 10a- Figure 10 b during a=8.

During b=1, it is described in detail below：

One packet in transmission DM-RS antenna port corresponding to DM-RS RE be in one PRB pair according to The order of subcarrier number from low to high 12-a, 11-a corresponding in described two OFDM symbols, the 11st and 12nd RE；DM-RS RE corresponding to the antenna port of transmission DM-RS in another packet are in one PRB pair According to the order of subcarrier number from low to high in described two OFDM symbols corresponding to the 1st, the 2nd, 1+a and The 2+a RE；Wherein, a=8 or 7 or 6 or 4 or 3 or 2；

During b=2, it is specifically described as：

One packet in transmission DM-RS antenna port corresponding to DM-RS RE be in one PRB pair according to The order of subcarrier number from low to high 10-a, 11-a corresponding in described two OFDM symbols, the 10th and 11st RE；DM-RS RE corresponding to the antenna port of transmission DM-RS in another packet are in one PRB pair According to the order of subcarrier number from low to high in described two OFDM symbols corresponding to the 2nd, the 3rd, 2+a and The 3+a RE；Wherein, a=6 or 5 or 3 or 2；

During b=3, it is specifically described as：

One packet in transmission DM-RS antenna port corresponding to DM-RS RE be in one PRB pair according to The order of subcarrier number from low to high 9-a, 10-a corresponding in described two OFDM symbols, the 9th and the 10 RE；Another packet in transmission DM-RS antenna port corresponding to DM-RS RE be in one PRB pair by According to the order of subcarrier number from low to high in described two OFDM symbols corresponding to the 3rd, the 4th, 3+a and the 4th + a RE；Wherein, a=4 or 2.

Method 2：DM-RS RE corresponding to DM-RS antenna port in one packet be in each PRB pair according to The order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 5th, the 6th, the 11st and 12nd RE；DM-RS RE corresponding to DM-RS antenna port in another packet are according to son in each PRB pair Carrier index from low to high in one or two OFDM symbols corresponding to the 3rd, the 4th, the 9th and the 10th RE, or, it is in one or two OFDM in each PRB pair according to subcarrier number order from low to high 2nd, the 3rd, the 8th and the 9th RE corresponding on symbol；

Method 3：With in each PRB pair according to subcarrier number order from low to high one or two 1st, the 4th, the 7th and the 10th RE corresponding in individual OFDM symbol is one group of DM-RS RE, the 3rd, the 6th, the 9th It is one group of DM-RS RE with the 12nd RE, the 2nd, the 5th, the 8th and the 11st RE is one group of DM-RS RE, in a packet DM-RS antenna port corresponding to DM-RS RE be 3 groups of DM-RS RE in one group；DM-RS days in another packet DM-RS RE corresponding to line end mouth are another group in 3 groups of DM-RS RE；

Method 4：DM-RS RE corresponding to DM-RS antenna port in one packet be in each PRB pair according to The order of subcarrier number from low to high 12-b-c+1-a, 12-b corresponding in one or two OFDM symbols + 1-a, 12-b-c+1 and the 12-b+1 RE；DM-RS RE corresponding to DM-RS antenna port in another packet Be in each PRB pair according to subcarrier number order from low to high in one or two OFDM symbols it is right B-th, b+c, b+a answered and the b+c+a RE；Wherein, b=1, c=3, a=6, or, b=1, c=2, a=4, or b= 2, c=2, a=4；

Method 5：DM-RS RE corresponding to DM-RS antenna port in one packet be in each PRB pair according to The order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 2nd, the 5th, the 8th and 11st RE；DM-RS RE corresponding to DM-RS antenna port in another packet are according to son in each PRB pair The order of carrier index from low to high is the 1st, the 4th, the 7th and the corresponding in one or two OFDM symbols According to subcarrier number order from low to high in one or two OFDM in 10 RE, or each PRB pair 3rd, the 6th, the 9th and the 12nd RE corresponding on symbol；

Example 3：

When A=2 and when DM-RS is mapped into two OFDM symbols：Corresponding to DM-RS antenna port in one packet DM-RS RE be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols Corresponding 12-b+1-a and the 12-b+1 RE；Another packet in DM-RS antenna port corresponding to DM-RS RE be In each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to b-th With the b+a RE, wherein, as b=1, a is 1 to 10 to include any integer including 1 and 10（Figure 11 a- Figure 11 d correspond to b= 1, a=8 situation）, as b=2, a is 1 to 10 to include any integer in addition to 9 including 1 and 10（Figure 12 a- Figure 12 d Corresponding b=2, the situation of a=8）, as b=3, a is 1 to 9 to include any integer in addition to 7 including 1 and 9, when b=4 When, a is 1 to 8 include any integer in addition to 5 including 1 and 8, and as b=5, a includes including 1 and 7 for 1 to 7 Any integer in addition to 3.

For the resource mapping method of above-mentioned 8 port（Such as the specific resource mapping method provided in example 1- examples 3）, It is used for the physical resource for transmitting DM-RS in the burst in network side, passes through the antenna end for being used to transmit DM-RS in the subframe Mouth is to the DM-RS after the terminal transmission resource impact before, it is necessary to perform following DM-RS spread spectrum operation：

When A is not 4 integral multiple and DM-RS is mapped in two OFDM symbols：, will for each DM-RS antenna port 4 DM-RS in the DM-RS antenna port on two subcarriers adjacent or closest in described two OFDM symbols make For one group, and spread processing is carried out to every group of DM-RS respectively using the orthogonal sequence that length corresponding to the antenna port is 4；Or Person,

When A is 4 integral multiple：For each DM-RS antenna port, by the DM-RS antenna port in each mapping There are 4 DM-RS on 4 subcarriers adjacent or closest in DM-RS OFDM symbol as one group, and use the antenna The orthogonal sequence that length corresponding to port is 4 carries out spread processing to every group of DM-RS respectively.

Above-mentioned spread processing is described in detail below：

When A=6 and when DM-RS is mapped to two OFDM symbols：

For each transmission DM-RS antenna port, by the antenna port in described two OFDM symbols it is adjacent or 4 DM-RS on two closest subcarriers as one group, and using length corresponding to the antenna port be 4 it is orthogonal Sequence carries out spread processing to every group of DM-RS respectively；

When A=4 and when DM-RS is mapped to two OFDM symbols：

For each DM-RS antenna port, by adjacent or distance is most in described two OFDM symbols on the antenna port 4 DM-RS on two near subcarriers use the orthogonal sequence point that length corresponding to the antenna port is 4 as one group It is other that spread processing is carried out to every group of DM-RS；Or

For each DM-RS antenna port, by the antenna port in each OFDM symbol for being mapped with DM-RS 4 Individual DM-RS is expanded every group of DM-RS respectively as one group, and using the orthogonal sequence that length corresponding to the antenna port is 4 Frequency is handled；

When A=4 and when DM-RS is mapped to an OFDM symbol：

For each DM-RS antenna port, by 4 DM- on the antenna port on DM-RS OFDM symbol is mapped with RS is one group, and carries out spread processing to this group of DM-RS using the orthogonal sequence that length corresponding to the antenna port is 4；

When A=2 and when DM-RS is mapped to two OFDM symbols：

For each DM-RS antenna port, 4 DM-RS on the antenna port in described two OFDM symbols are made For one group, and spread processing is carried out to this group of DM-RS using the orthogonal sequence that length corresponding to the antenna port is 4.

Specifically, above-mentioned be divided into 4 groups by 8 DM-RS antenna ports, each packet includes 2 DM-RS antenna ports, 2 DM-RS days lower ports in same packet correspond to identical DM-RS RE；For each packet, in each PRB pair The middle subcarrier for determining that A numbering is different, the subcarrier determined for different grouping are different；By what is determined in each PRB pair A subcarrier in one or two OFDM symbols corresponding RE as the DM-RS antenna port in corresponding be grouped every In individual PRB pair during corresponding DM-RS RE, it can specifically include the following two kinds example：

Example 1：

When A=3 and when DM-RS is mapped into two OFDM symbols：

DM-RS RE corresponding to DM-RS antenna port in first packet are according to son in each PRB pair The order of carrier index from low to high the 4th, the 8th and the 12nd RE corresponding in described two OFDM symbols；

DM-RS RE corresponding to DM-RS antenna port in second packet are according to son in each PRB pair The order of carrier index from low to high the 1st, the 5th and the 9th RE corresponding in described two OFDM symbols；

DM-RS RE corresponding to DM-RS antenna port in 3rd packet are according to son in each PRB pair The order of carrier index from low to high the 3rd, the 7th and the 11st RE corresponding in described two OFDM symbols；

DM-RS RE corresponding to DM-RS antenna port in 4th packet are according to son in each PRB pair The order of carrier index from low to high the 2nd, the 6th and the 10th RE corresponding in described two OFDM symbols；

Example 2：

When A=2 and when DM-RS is mapped into one or two OFDM symbol, including following method 1 is to one in method 3 It is individual：

Method 1：By in each PRB pair according to subcarrier number order from low to high one or two In individual OFDM symbol corresponding to b-th and the b+a RE as one group, obtain（12-a）Group RE, wherein, a includes 2 for 2 to 8 With any integer including 8, b arrives for 1（12-a）Include 1 He（12-a）Any integer inside；First, second, third and fourth point DM-RS RE corresponding to DM-RS antenna port in group are respectively described（12-a）One group of RE in group RE, each packet are corresponding The RE groups it is different；

I.e.：

During a=8, b=1 ~ 4 obtain 4 groups of RE, according to subcarrier number from low to high suitable in a respectively PRB pair Sequence in one or two OFDM symbols corresponding to the 1st and the 9th RE, the 2nd and the 10th RE, the 3rd and the 11st RE, 4th and the 12nd RE, i.e. corresponding diagram 14a- Figure 14 d；

During a=7, b=1 ~ 5 obtain 5 groups of RE, according to subcarrier number from low to high suitable in a respectively PRB pair Sequence in one or two OFDM symbols corresponding to the 1st and the 8th RE, the 2nd and the 9th RE, the 3rd and the 10th RE, 4th and the 11st RE, the 5th and the 12nd RE, wherein each packet in the packet of 4 DM-RS antenna ports correspond to respectively it is above-mentioned One group of RE in RE groups, preferably, 4 DM-RS antenna port groups are corresponded in a PRB pair according to subcarrier number respectively Order from low to high is the 1st and the 8th RE corresponding in one or two OFDM symbols, the 5th and the 12nd RE, the 4 and the 11st RE, the 2nd and the 9th RE；

During a=6, b=1 ~ 6 obtain 6 groups of RE, according to subcarrier number from low to high suitable in a respectively PRB pair Sequence is the 1st and the 7th RE corresponding in one or two OFDM symbols, the 2nd and the 8th RE, the 3rd and the 9th RE, the 4 and the 10th RE, the 5th and the 11st RE, the 6th and the 12nd RE, wherein each packet in 4 DM-RS antenna port packets One group of RE in above-mentioned RE groups is corresponded to respectively, and preferably, 4 DM-RS antenna port groups correspond to pressed in a PRB pair respectively According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 1st and the 7th RE, the 6th With the 12nd RE, the 2nd and the 8th RE, the 5th and the 11st RE, or respectively correspond to a PRB pair in compiled according to subcarrier Order number from low to high is the 1st and the 7th RE corresponding in one or two OFDM symbols, the 6th and the 12nd RE, 3rd and the 9th RE, the 4th and the 10th RE, or correspond to respectively in PRB pair according to subcarrier number from low to high Order in one or two OFDM symbols corresponding to the 2nd and the 8th RE, the 5th and the 11st RE, the 3rd and the 9th RE, the 4th and the 10th RE；

During a=5, b=1 ~ 7 obtain 7 groups of RE, according to subcarrier number from low to high suitable in a respectively PRB pair Sequence is the 1st and the 6th RE corresponding in one or two OFDM symbols, the 2nd and the 7th RE, the 3rd and the 8th RE, the 4 and the 9th RE, the 5th and the 10th RE, the 6th and the 11st RE, the 7th and the 12nd, wherein in the packet of 4 DM-RS antenna ports Each packet correspond to one group of RE in above-mentioned RE groups respectively, preferably, 4 DM-RS antenna port groups correspond to a PRB respectively In pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to the 1st and the 6th Individual RE, the 7th and the 12nd RE, the 3rd and the 8th RE, the 5th and the 10th RE, or correspond to respectively in a PRB pair according to son The order of carrier index from low to high is the 2nd and the 7th RE corresponding in one or two OFDM symbols, the 6th and the 11 RE, the 3rd and the 8th RE, the 5th and the 10th RE；

During a=4, b=1 ~ 8 obtain 8 groups of RE, according to subcarrier number from low to high suitable in a respectively PRB pair Sequence is the 1st and the 5th RE corresponding in one or two OFDM symbols, the 2nd and the 6th RE, the 3rd and the 7th RE, the 4 and the 8th RE, the 5th and the 9th R, the 6th and the 10th RE, the 7th and the 11st RE, the 8th and the 12nd RE, wherein 4 DM-RS Each packet in antenna port packet corresponds to one group of RE in above-mentioned RE groups, preferably, 4 DM-RS antenna port groups respectively Correspond to respectively in a PRB pair according to subcarrier number order from low to high in one or two OFDM symbols Corresponding 1st and the 5th RE, the 8th and the 12nd RE, the 2nd and the 6th RE, the 7th and the 11st RE, or one is corresponded to respectively In individual PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to the 1st With the 5th RE, the 8th and the 12nd RE, the 3rd and the 7th RE, the 6th and the 10th RE, or respectively correspond to a PRB pair in According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 2nd and the 6th RE, the 7 and the 11st RE, the 4th and the 8th RE, the 5th and the 9th RE, or correspond to compiled in a PRB pair according to subcarrier respectively Order number from low to high is the 3rd and the 7th RE corresponding in one or two OFDM symbols, the 6th and the 10th RE, 4th and the 8th RE, the 5th and the 9th RE；

During a=3, b=1 ~ 9 obtain 9 groups of RE, according to subcarrier number from low to high suitable in a respectively PRB pair Sequence is the 1st and the 4th RE corresponding in one or two OFDM symbols, the 2nd and the 5th RE, the 3rd and the 6th RE, the 4 and the 7th RE, the 5th and the 8th RE, the 6th and the 9th RE, the 7th and the 10th RE, the 8th and the 11st RE, the 9th and the 12nd RE, wherein each packet in 4 DM-RS antenna port packets corresponds to one group of RE in above-mentioned RE groups, preferably, 4 respectively DM-RS antenna port group correspond to respectively in a PRB pair according to subcarrier number order from low to high one or 1st and the 4th RE, the 9th and the 12nd RE, the 2nd and the 5th RE, the 8th and the 11st RE corresponding in two OFDM symbols, Or correspond in a PRB pair and accorded with according to the order of subcarrier number from low to high in one or two OFDM respectively 1st and the 4th RE, the 9th and the 12nd RE, the 3rd and the 6th RE, the 7th and the 10th RE corresponding on number, or it is right respectively Answer in a PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to 2nd and the 5th RE, the 8th and the 11st RE, the 3rd and the 6th RE, the 3rd and the 10th RE, or a PRB is corresponded to respectively In pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to the 2nd and the 5th Individual RE, the 8th and the 11st RE, the 4th and the 7th RE, the 6th and the 9th RE；

During a=2, b=1 ~ 10 obtain 10 groups of RE, in a respectively PRB pair according to subcarrier number from low to high Order in one or two OFDM symbols corresponding to the 1st and the 3rd RE, the 2nd and the 4th RE, the 3rd and the 5th RE, 4th and the 6th RE, the 5th and the 7th RE, the 6th and the 8th RE, the 7th and the 9th RE, the 8th and the 10th RE, the 9th and the 11st RE, the 10th and the 12nd RE, wherein each packet in 4 DM-RS antenna port packets corresponds to one in above-mentioned RE groups respectively Group RE, preferably, 4 DM-RS antenna port groups are corresponded in PRB pair according to subcarrier number from low to high respectively Order in one or two OFDM symbols corresponding to the 1st and the 3rd RE, the 10th and the 12nd RE, the 2nd and the 4th RE, the 9th and the 11st RE, or correspond to respectively in a PRB pair according to subcarrier number order from low to high described 1st and the 3rd RE, the 10th and the 12nd RE, the 4th and the 6th RE, the 7th and the 9th corresponding in one or two OFDM symbol Individual RE, or correspond to respectively in a PRB pair according to subcarrier number order from low to high one or two 1st and the 3rd RE, the 10th and the 12nd RE, the 5th and the 7th RE, the 6th and the 8th RE corresponding in OFDM symbol, or Correspond to respectively in a PRB pair according to subcarrier number order from low to high in one or two OFDM symbols Corresponding 2nd and the 4th RE, the 9th and the 11st RE, the 3rd and the 5th RE, the 8th and the 10th RE, or one is corresponded to respectively In individual PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to the 2nd With the 4th RE, the 9th and the 11st RE, the 5th and the 7th RE, the 6th and the 8th RE, or respectively correspond to a PRB pair in According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 3rd and the 5th RE, the 8 and the 10th RE, the 4th and the 6th RE, the 7th and the 9th RE；

Method 2：DM-RS RE corresponding to DM-RS antenna port in first packet are in each PRB pair According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to b-th and the b+1 RE； DM-RS RE corresponding to DM-RS antenna port in second packet are to be compiled in each PRB pair according to subcarrier Order number from low to high is 12-b and the 12-b+1 RE corresponding in one or two OFDM symbols；3rd DM-RS RE corresponding to DM-RS antenna port in packet be in each PRB pair according to subcarrier number from it is low to High order is b+a and the b+1+a RE corresponding in one or two OFDM symbols；In 4th packet DM-RS RE corresponding to DM-RS antenna port are the orders according to subcarrier number from low to high in each PRB pair 12-b-a and the 12-b+1-a RE corresponding in one or two OFDM symbols；Wherein, b=1, a=2 or 3 or 4, or, b=2, a=2 or 3, or b=3, a=2（Corresponding diagram 15a- Figure 15 b）；

Method 3：DM-RS RE corresponding to DM-RS antenna port in first packet are in each PRB pair According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to b-th and the b+1 RE； DM-RS RE corresponding to DM-RS antenna port in second packet are according to subcarrier number in each PRB pair Order from low to high is b+a and the b+a+1 RE corresponding in one or two OFDM symbols；3rd packet In DM-RS antenna port corresponding to DM-RS RE be in each PRB pair according to subcarrier number from low to high Order is b+2a and the b+2a+1 RE corresponding in one or two OFDM symbols；DM- in 4th packet DM-RS RE corresponding to RS antenna ports are to exist in each PRB pair according to the order of subcarrier number from low to high B+3a and the b+3a+1 RE corresponding in one or two OFDM symbols；Wherein, a=2, b include 1 for 1 to 5 With any integer including 5, or, a=3, b=1 or 2.

Specifically, when supporting maximum 4 DM-RS antenna ports, 4 DM-RS antenna ports are divided into 2 groups, each Packet includes 2 DM-RS antenna ports, and 2 DM-RS antenna ports in same packet correspond to identical DM-RS RE, and DM-RS RE corresponding to each DM-RS antenna port are determined as follows：

When A=3（Corresponding diagram 16a- Figure 16 d）And when DM-RS is mapped into two OFDM symbols：DM-RS in one packet DM-RS RE corresponding to antenna port are in institute in each PRB pair according to subcarrier number order from low to high 2nd, the 7th and the 12nd RE corresponding to stating in two OFDM symbols, the DM-RS antenna port in another packet are corresponding DM-RS RE be to be accorded with each PRB pair according to the order of subcarrier number from low to high in described two OFDM 1st, the 6th and the 11st RE corresponding on number；Or

When A=4（Corresponding diagram 17a）And when DM-RS is mapped into an OFDM symbol：DM-RS antenna ends in one packet DM-RS RE corresponding to mouthful are described two in each PRB pair according to subcarrier number order from low to high 3rd, the 4th, the 11st and the 12nd RE corresponding in OFDM symbol, the DM-RS antenna port in another packet are corresponding DM-RS RE be to be accorded with each PRB pair according to the order of subcarrier number from low to high in described two OFDM 1st, the 2nd, the 9th and the 10th RE corresponding on number；Or

When A=6（Corresponding diagram 17b）And when DM-RS is mapped into one or two OFDM symbol：DM-RS in one packet DM-RS RE corresponding to antenna port are in institute in each PRB pair according to subcarrier number order from low to high 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE corresponding to stating in one or two OFDM symbol；Another point DM-RS RE corresponding to DM-RS antenna port in group be in each PRB pair according to subcarrier number from low to high Order in one or two OFDM symbols corresponding to the 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE。

Specifically, when supporting maximum 2 DM-RS antenna ports（The situation is generally extended under CP）, each DM-RS days DM-RS RE are identical corresponding to line end mouth, and determine DM-RS RE corresponding to each DM-RS antenna port as follows：

When A=2 and when DM-RS is mapped into one or two OFDM symbol：DM-RS corresponding to each DM-RS antenna port RE is in one or two OFDM symbols in each PRB pair according to subcarrier number order from low to high B-th and the b+a RE corresponding to upper, wherein, a is 1 to 11 to include any integer including 1 and 11, and b arrives for 1（12-a） Include 1 He（12-a）Any integer inside；Or

When A=3 and when DM-RS is mapped into two OFDM symbols：Each DM-RS RE corresponding to DM-RS antenna port are In each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 2, the 7th and the 12nd RE, or DM-RS RE corresponding to each DM-RS antenna port be in each PRB pair by According to the order of subcarrier number from low to high in described two OFDM symbols corresponding to the 1st, the 6th and the 11st RE；Or Person,

When A=4 and when DM-RS is mapped into one or two OFDM symbol：DM-RS corresponding to each DM-RS antenna port RE is in one or two OFDM symbols in each PRB pair according to subcarrier number order from low to high B-th corresponding to upper, b+a is individual, b+2a is individual and the b+3a RE, wherein, a=1, b were 1 to 9 appointing including 1 and 9 One integer（B=2, a=3, when DM-RS is mapped to two OFDM symbols, corresponding diagram 18a- Figure 18 c）, or a=2, b be 1 to 6 include 1 With any integer including 6, or a=3, b=1 or 2 or 3 or 4；Or DM-RS RE corresponding to each DM-RS antenna port be Corresponded in each PRB pair according to the order of subcarrier number from low to high in one or two OFDM symbols B-th, b+1, b+a and the b+1+a RE, wherein, a is 3 to 10 any integer including 3 and 10, for 1 Arrive（11-a）Including 1 He（11-a）Any integer inside（A=10, b=1, when DM-RS is mapped to an OFDM symbol, corresponding diagram 19a）；Or

When A=6 and when DM-RS is mapped into one or two OFDM symbol：DM-RS corresponding to each DM-RS antenna port RE is in one or two OFDM symbols in each PRB pair according to subcarrier number order from low to high 2nd, the 3rd, the 6th, the 7th, the 10th and the 11st RE corresponding to upper.

8 DM-RS antenna ports are divided into 4 groups of two examples and support maximum 4 and 2 DM- for above-mentioned The situation of RS antenna ports, it is used for the physical resource for transmitting DM-RS in the burst in network side, by being used in the subframe DM-RS antenna port is transmitted to the DM-RS after the terminal transmission resource impact before, it is necessary to perform following DM-RS expansion Frequency is handled：

When DM-RS is mapped into two OFDM symbols：For each DM-RS antenna port, by the antenna port 2 DM-RS of same subcarrier are corresponded in described two OFDM symbols as one group, and use length corresponding to the antenna port Spread processing is carried out to every group of DM-RS for 2 orthogonal sequence；Or

When A is 2 integral multiple：For each DM-RS antenna port, DM- will be mapped with described on the antenna port 2 DM-RS in RS OFDM symbol are as one group, and using the orthogonal sequence that length corresponding to the antenna port is 2 to this Group DM-RS carries out spread processing.

It is above-mentioned that spread processing is described in detail below：

For above-mentioned two examples that 8 DM-RS antenna ports are divided into 4 groups：

When A=3 and when DM-RS is mapped into two OFDM symbols：For each DM-RS antenna port, by the antenna port On 2 DM-RS of same subcarrier are corresponded in described two OFDM symbols as one group, and using corresponding to the antenna port The orthogonal sequence that length is 2 carries out spread processing to every group of DM-RS；

When A=2 and when DM-RS is mapped into an OFDM symbol：For each DM-RS antenna port, by the antenna end 2 DM-RS on mouth in one OFDM symbol are 2 just as one group, and using length corresponding to the antenna port This group of DM-RS of sequence pair is handed over to carry out spread processing；

When A=2 and when DM-RS is mapped into two OFDM symbols：For each DM-RS antenna port, by the antenna end 2 DM-RS of same subcarrier are corresponded on mouth in described two OFDM symbols as one group, or, by institute on the antenna port 2 DM-RS in each OFDM symbol comprising DM-RS are stated as one group, the use of length corresponding to the antenna port are 2 just Every group of DM-RS of sequence pair is handed over to carry out spread processing.

In the case of maximum 4 DM-RS antenna ports are supported：

When A=4 and when DM-RS is mapped into an OFDM symbol：For each DM-RS antenna port, by the antenna port On 2 DM-RS on two subcarriers adjacent or closest in one OFDM symbol as one group, and using should The orthogonal sequence that length corresponding to antenna port is 2 carries out spread processing to this group of DM-RS；

When A=6 and when DM-RS is mapped into an OFDM symbol：For each DM-RS antenna port, by the antenna port On 2 DM-RS on two subcarriers adjacent or closest in one OFDM symbol as one group, and using should The orthogonal sequence that length corresponding to antenna port is 2 carries out spread processing to this group of DM-RS；

When A=6 and when DM-RS is mapped into two OFDM symbols：For each DM-RS antenna port, by the antenna port On in 2 DM-RS conducts being mapped with two subcarriers adjacent or closest in DM-RS each OFDM symbol One group, or, using 2 DM-RS for corresponding to same subcarrier on the antenna port in described two OFDM symbols as one group, make The orthogonal sequence that the length corresponding to the antenna port is 2 carries out spread processing to this group of DM-RS；

In the case of maximum 2 DM-RS antenna ports are supported：

When A=2 or 4 or 6, and when DM-RS is mapped into two OFDM symbols：For each DM-RS antenna port, by this 2 DM-RS of same subcarrier are corresponded on antenna port in described two OFDM symbols as one group, or, by the antenna end Make on mouth in 2 DM-RS being mapped with two subcarriers adjacent or closest in DM-RS each OFDM symbol For one group, spread processing is carried out to every group of DM-RS using the orthogonal sequence that length corresponding to the antenna port is 2；

When A=2 or 4 or 6 and when DM-RS is mapped into an OFDM symbol：For each DM-RS antenna port, by this 2 DM-RS on antenna port in one OFDM symbol are 2 as one group, and using length corresponding to the antenna port Orthogonal sequence spread processing is carried out to this group of DM-RS；

When A=3 and when DM-RS is mapped into two OFDM symbols：For each DM-RS antenna port, by the antenna end 2 DM-RS of same subcarrier are corresponded on mouth in described two OFDM symbols as one group, using corresponding to the antenna port The orthogonal sequence that length is 2 carries out spread processing to every group of DM-RS.

Referring to Fig. 6, the embodiment of the present invention provides a kind of data demodulation method, comprises the following steps：

Step 60：Terminal determines to be used for the physical resource for transmitting the special DM-RS of user in present sub-frame；

Step 61：Terminal is according to the DM-RS resource mapping methods of each DM-RS antenna port, respectively in present sub-frame Each DM-RS antenna port obtain the DM-RS antennas on corresponding DM-RS RE on the physical resource for transmitting DM-RS DM-RS corresponding to port, DM-RS RE corresponding to each DM-RS antenna port be the subframe in top n OFDM symbol in not RE where being same as synchronous transmission of signal in one or two OFDM symbol of OFDM symbol；Wherein N is not less than 1 and is not more than 6 integer；

Step 62：Terminal DM-RS according to corresponding to each DM-RS antenna port, to what is received on respective antenna port Downlink data is demodulated.

Specifically, for conventional CP, N maximum occurrences are 6；For extending CP, N maximum occurrences are 5；Or for Conventional CP and extension CP, N maximum occurrences are 3.

Specifically, in a tdd system, the subframe for transmitting DM-RS is that the special son of special subframe configuration 9 is corresponded under conventional CP Frame, or to correspond to the special subframe of special subframe configuration 7 under extension CP；Or DM-RS subframe is transmitted as in FDD system Descending sub frame；Or in a tdd system, the subframe for transmitting DM-RS is corresponding in addition to special subframe configuration 9 under conventional CP The configuration of other special subframes special subframe, or be corresponding other special sons in addition to special subframe configuration 7 under extension CP The special subframe of frame configuration；Or in a tdd system, the subframe for transmitting DM-RS is to correspond to any special subframe under conventional CP to match somebody with somebody The special subframe put, or to correspond to the special subframe of any special subframe configuration under extension CP.

Further, if transmission DM-RS subframe is synchronous transmission of signal subframe, terminal also in present sub-frame the 3rd Synchronizing signal is received in individual OFDM symbol.

Specifically, DM-RS RE corresponding to each DM-RS antenna port are different in the top n OFDM symbol in the subframe Where the synchronous transmission of signal during RE in two OFDM symbols of OFDM symbol, two OFDM symbols are continuous or non-company Continuous OFDM symbol；Preferably, two OFDM symbols are the 1st OFDM symbol and the 2nd OFDM symbol in present sub-frame, Or be the 4th OFDM symbol and the 5th OFDM symbol in present sub-frame, or for the 5th OFDM symbol in present sub-frame and 6th OFDM symbol, or be the 2nd OFDM symbol and the 4th OFDM symbol in present sub-frame, or be the in present sub-frame 4 OFDM symbols and the 6th OFDM symbol, or for any two in the 1st, 2,4,5,6 OFDM symbol in present sub-frame not Continuous OFDM symbol；

Or

DM-RS RE corresponding to each DM-RS antenna port are to be different from synchronously in the top n OFDM symbol in the subframe When signal transmits the RE in an OFDM symbol of place OFDM symbol, an OFDM symbol is to be removed in top n OFDM symbol Any one OFDM symbol beyond OFDM symbol where synchronous transmission of signal.Preferably, an OFDM symbol is current The 1st OFDM symbol, the 2nd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol, the 6th OFDM symbol in subframe In any one.

Example 1：

When A=6 and when DM-RS is mapped into two OFDM symbols：Corresponding to DM-RS antenna port in one packet DM-RS RE are in described two OFDM symbols in each PRB pair according to subcarrier number order from low to high 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE corresponding to upper；DM-RS antenna port in another packet Corresponding DM-RS RE are described two in each PRB pair according to subcarrier number order from low to high 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE corresponding in OFDM symbol；Or

Example 2：

Method 2：DM-RS RE corresponding to DM-RS antenna port in one packet be in each PRB pair according to The order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 5th, the 6th, the 11st, With the 12nd RE；DM-RS RE corresponding to DM-RS antenna port in another packet be in each PRB pair according to Subcarrier number from low to high in one or two OFDM symbols corresponding to the 3rd, the 4th, the 9th and the 10th RE, or, it is in one or two OFDM in each PRB pair according to subcarrier number order from low to high 2nd, the 3rd, the 8th and the 9th RE corresponding on symbol；

Method 5：DM-RS RE corresponding to DM-RS antenna port in one packet be in each PRB pair according to The order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 2nd, the 5th, the 8th and 11st RE；DM-RS RE corresponding to DM-RS antenna port in another packet are according to son in each PRB pair The order of carrier index from low to high is the 1st, the 4th, the 7th and the corresponding in one or two OFDM symbols According to subcarrier number order from low to high in one or two OFDM in 10 RE, or each PRB pair 3rd, the 6th, the 9th and the 12nd RE corresponding on symbol；Or

Example 3：

When A=2 and when DM-RS is mapped into two OFDM symbols：Corresponding to DM-RS antenna port in one packet DM-RS RE be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols Corresponding 12-b+1-a and the 12-b+1 RE；Another packet in DM-RS antenna port corresponding to DM-RS RE be In each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to b-th With the b+a RE, wherein, as b=1, a is 1 to 10 include any integer including 1 and 10, and as b=2, a is in 1 to 10 Any integer in addition to 9 including 1 and 10, as b=3, a be 1 to 9 include including 1 and 9 in addition to 7 Any integer, as b=4, a is 1 to 8 include any integer in addition to 5 including 1 and 8, and as b=5, a is in 1 to 7 Any integer in addition to 3 including 1 and 7.

For examples detailed above 1- examples 3, terminal acquisition DM-RS specific implementation can be as follows in step 61：

Specifically, above-mentioned be divided into 4 groups by 8 DM-RS antenna ports, each packet includes 2 DM-RS antenna ports, 2 DM-RS days lower ports in same packet correspond to identical DM-RS RE；For each packet, in each PRB pair The middle subcarrier for determining that A numbering is different, the subcarrier determined for different grouping are different；By what is determined in each PRB pair A subcarrier in one or two OFDM symbols corresponding RE as the DM-RS antenna port in corresponding be grouped every In individual PRB pair during corresponding DM-RS RE, it can specifically include the following two kinds example：：

Example 1：

When A=3 and when DM-RS is mapped into two OFDM symbols：

Example 2：

Method 2：DM-RS RE corresponding to DM-RS antenna port in first packet are in each PRB pair According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to b-th and the b+1 RE； DM-RS RE corresponding to DM-RS antenna port in second packet are according to subcarrier number in each PRB pair Order from low to high is 12-b and the 12-b+1 RE corresponding in one or two OFDM symbols；3rd DM-RS RE corresponding to DM-RS antenna port in packet be in each PRB pair according to subcarrier number from it is low to High order is b+a and the b+1+a RE corresponding in one or two OFDM symbols；In 4th packet DM-RS RE corresponding to DM-RS antenna port are the orders according to subcarrier number from low to high in each PRB pair 12-b-a and the 12-b+1-a RE corresponding in one or two OFDM symbols；Wherein, b=1, a=2 or 3 or 4, or, b=2, a=2 or 3, or b=3, a=2；

When A=3 and when DM-RS is mapped into two OFDM symbols：DM- corresponding to DM-RS antenna port in one packet RS RE be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols it is right The 2nd, the 7th and the 12nd RE answered, DM-RS RE corresponding to the DM-RS antenna port in another packet are described every In individual PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 1st, the 6th Individual and the 11st RE；Or

When A=4 and when DM-RS is mapped into an OFDM symbol：DM- corresponding to DM-RS antenna port in one packet RS RE be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols it is right The 3rd, the 4th, the 11st and the 12nd RE answered, DM-RS RE corresponding to the DM-RS antenna port in another packet are In each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 1st Individual, the 2nd, the 9th and the 10th RE；Or

When A=6 and when DM-RS is mapped into one or two OFDM symbol：DM-RS antenna port pair in one packet The DM-RS RE answered are one or two in each PRB pair according to subcarrier number order from low to high 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE corresponding in individual OFDM symbol；DM- in another packet DM-RS RE corresponding to RS antenna ports are to exist in each PRB pair according to the order of subcarrier number from low to high 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE corresponding in one or two OFDM symbols.

Specifically, when supporting maximum 2 DM-RS antenna ports, DM-RS RE phases corresponding to each DM-RS antenna port Together, DM-RS RE corresponding to each DM-RS antenna port and are determined as follows：

When A=3 and when DM-RS is mapped into two OFDM symbols：Each DM-RS RE corresponding to DM-RS antenna port are In each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 2nd Individual, the 7th and the 12nd RE, or DM-RS RE corresponding to each DM-RS antenna ports be in each PRB pair by According to the order of subcarrier number from low to high in described two OFDM symbols corresponding to the 1st, the 6th and the 11st RE；Or Person,

When A=4 and when DM-RS is mapped into one or two OFDM symbol：DM-RS corresponding to each DM-RS antenna port RE is in one or two OFDM symbols in each PRB pair according to subcarrier number order from low to high B-th corresponding to upper, b+a is individual, b+2a is individual and the b+3a RE, wherein, a=1, b are 1 to 9 any including 1 and 9 Integer, or a=2, b are 1 to 6 any integer including 1 and 6, or a=3, b=1 or 2 or 3 or 4；Or each DM-RS days DM-RS RE corresponding to line end mouth are described in each PRB pair according to subcarrier number order from low to high B-th corresponding in one or two OFDM symbol, b+1 is individual, b+a is individual and the b+1+a RE, wherein, a is 3 to 10 bags Any integer including 3 and 10 is included, is arrived for 1（11-a）Including 1 He（11-a）Any integer inside；Or

8 DM-RS antenna ports are divided into 4 groups of two examples and support maximum 4 and 2 DM- for above-mentioned The situation of RS antenna ports, in step 61 terminal obtain DM-RS method can be as follows：

DM-RS resource mapping method is further illustrated by below：

RE corresponding to each DM-RS antenna port, in units of a PRB pair, is included in the PRBpair Different and as equally distributed as possible A is numbered in subcarrier（1<A<12）Individual subcarrier is right in 1 or 2 OFDM symbol The RE answered；For the special DM-RS of UE of 1 ~ 8 antenna port, the following two kinds method for mapping resource can be used：

Method 1：Every 4 ports are one group in 8 antenna ports, the multiple different antenna ports being divided into 2 groups, every group Corresponding identical DM-RS RE；

For example, when A=6 and DM-RS two OFDM symbols of occupancy：The DM-RSRE of first group of antenna port is in a PRB In pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 3rd, 4,7,8,11,12 RE, the DM-RS RE of second group of antenna port are from low to high described in a PRB pair according to subcarrier number 1st, 2,5,6,9,10 RE corresponding in two OFDM symbols, as shown in Fig. 7 a- Fig. 7 e；

For each antenna port, two subcarriers will be corresponded on the antenna port in two OFDM symbols（Preferably, it is Adjacent or closest subcarrier）4 DM-RS as one group, use length be 4 orthogonal sequence（Shown in table 1）Carry out Spread spectrum, i.e., spread as the DM-RS in Fig. 7 a- Fig. 7 e in circle is one group；

Wherein, discontinuous OFDM symbol situation is only by taking the 2nd and the 4th as an example, when discontinuous OFDM symbol is the 1st, 2,4,5,6 In other combined situations when, the DM-RS RE frequency domain positions in each OFDM symbol repeat no more with Fig. 7 d；

In another example when A=4 and DM-RS 2 OFDM symbols of occupancy：The DM-RS RE of first group of antenna port are at one In PRB pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 3rd, 4,11,12 RE, the DM-RS RE of second group of antenna port are from low to high described in a PRB pair according to subcarrier number 1st, 2,9,10 RE corresponding in two OFDM symbols, as shown in Fig. 8 a- Fig. 8 d, or, the DM-RS of first group of antenna port RE be in a PRB pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 5th, 6th, 11,12 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high Order the 3rd, 4,9,10 RE corresponding in described two OFDM symbols, or, for example, the DM-RS of first group of antenna port RE be in a PRB pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 5th, 6th, 11,12 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high Order the 2nd, 3,8,9 RE corresponding in described two OFDM symbols；Or 4 DM-RS RE in each OFDM symbol Can also be mutual discontinuous 4 RE on frequency domain；

For each antenna port, two subcarriers will be corresponded on the antenna port in two OFDM symbols（Preferably, it is Adjacent or closest subcarrier）4 DM-RS as one group, use length be 4 orthogonal sequence（Shown in table 1）Carry out Spread spectrum, spread as the DM-RS in Fig. 8 a- Fig. 8 d in circle is one group；Or by each OFDM symbol on the antenna port On 4 DM-RS as one group, using length be 4 orthogonal sequence spread, such as the DM-RS in Fig. 8 a- Fig. 8 d in square frame Spread for one group；

Wherein, discontinuous OFDM symbol situation is only by taking the 2nd and the 4th as an example, when discontinuous OFDM symbol is the 1st, 2,4,5,6 In other combined situations when, the frequency domain position of the DM-RS RE in each OFDM symbol repeats no more with Fig. 8 d；

In another example when A=4 and DM-RS 1 OFDM symbol of occupancy：The DM-RS RE of first group of antenna port are at one In PRB pair according to subcarrier number from low to high in 1 OFDM symbol corresponding to the 7th, 8,9,10 RE, The DM-RS RE of second group of antenna port are from low to high at described 1 in a PRB pair according to subcarrier number 3rd, 4,5,6 RE corresponding in OFDM symbol, as shown in Fig. 9 a- Fig. 9 b（Can also be other continuous 4 RE positions, example Such as first group of corresponding 8th, 9,10,11 RE, second group of corresponding 2nd, 3,4,5 RE, or, first group corresponding 9th, 10,11,12 Individual RE, second group of corresponding 1st, 2,3,4 RE）；Or the DM-RS RE of first group of antenna port are in a PRB pair According to subcarrier number from low to high in 1 OFDM symbol corresponding to the 3rd, 4,11,12 RE, second group of antenna The DM-RS RE of port be in a PRB pair according to subcarrier number from low to high in 1 OFDM symbol Corresponding 1st, 2,9,10 RE, as shown in Figure 10 a- Figure 10 b；Or 4 DM-RS RE in 1 OFDM symbol also may be used Think mutual discontinuous 4 RE on frequency domain；

For each antenna port, by DM-RS on the antenna port 4 DM-RS on the ofdm symbols be one group, make With the orthogonal sequence that length is 4（Shown in table 1）Spread；I.e. such as the DM- in Fig. 9 a- Fig. 9 b and Figure 10 a- Figure 10 b in circle RS is one group and spread；

It should be noted that 1 OFDM symbol is only gived in Fig. 9 a- Fig. 9 b and Figure 10 a- Figure 10 b as the 2nd or the The diagram of 4 OFDM symbols, when 1 OFDM symbol is the 1st or the 5th or the 6th OFDM symbol, the structure is equally suitable With only DM-RS RE are moved in corresponding OFDM symbol.

In another example when A=2 and DM-RS 2 OFDM symbols of occupancy：The DM-RSRE of first group of antenna port is in a PRB In pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 4th, 12 RE, second group of day The DM-RS RE of line end mouth are to be accorded with from low to high in described two OFDM according to subcarrier number in a PRB pair 1st, 9 RE corresponding on number, as shown in Figure 11 a- Figure 11 d；Or the DM-RS RE of first group of antenna port are at one In PRB pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 3rd, 11 RE, second The DM-RS RE of group antenna port are from low to high described two in a PRB pair according to subcarrier number 2nd, 10 RE corresponding in OFDM symbol, as shown in Figure 12 a- Figure 12 d；

For each antenna port, using 4 DM-RS on the antenna port in two OFDM symbols as one group, use Length is 4 orthogonal sequence（Shown in table 1）Spread, i.e., such as the DM- in Figure 11 a- Figure 11 d and Figure 12 a- Figure 12 d in circle RS is one group and spread；

Wherein, discontinuous OFDM symbol situation is only by taking the 2nd and the 4th as an example, when discontinuous OFDM symbol is the 1st, 2,4,5,6 In other combined situations when, the DM-RS RE frequency domain positions in each OFDM symbol repeat no more with Figure 11 d.

Method 2：Every 2 ports are one group in 8 antenna ports, the multiple different antenna ports being divided into 4 groups, every group Corresponding identical DM-RS RE；

For example, when A=3 and DM-RS 2 OFDM symbols of occupancy：The DM-RS RE of first group of antenna port are in a PRB In pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 4th, 8,12 RE, second group The DM-RS RE of antenna port are from low to high in described two OFDM in a PRB pair according to subcarrier number 1st, 5,9 RE corresponding on symbol, the DM-RS RE of the 3rd group of antenna port are according to subcarrier in a PRB pair Number corresponding 3rd, 7,11 RE, the DM-RS of the 4th group of antenna port in described two OFDM symbols from low to high RE be in a PRB pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 2nd, 6th, 10 RE, as shown in Figure 13 a- Figure 13 d；

For each antenna port, 2 DM- of same subcarrier will be corresponded on the antenna port in two OFDM symbols RS uses the orthogonal sequence that length is 2 as one group（Shown in table 2）Spread, i.e., as in Figure 13 a- Figure 13 d in circle DM-RS is one group and spread；

Wherein, discontinuous OFDM symbol situation is only by taking the 2nd and the 4th as an example, when discontinuous OFDM symbol is the 1st, 2,4,5,6 In other combined situations when, the DM-RS RE frequency domain positions in each OFDM symbol repeat no more with Figure 13 d.

In another example when A=2 and DM-RS 2 OFDM symbols of occupancy：The DM-RS RE of first group of antenna port are at one In PRB pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 4th, 12 RE, second The DM-RS RE of group antenna port are from low to high described two in a PRB pair according to subcarrier number 1st, 9 RE corresponding in OFDM symbol, the DM-RS RE of the 3rd group of antenna port are according to sub- load in a PRB pair Ripple numbers corresponding 3rd, 11 RE, the DM-RS of the 4th group of antenna port in described two OFDM symbols from low to high RE be in a PRB pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 2nd, 10 RE, as shown in Figure 14 a- Figure 14 d；Other frequency domain position combinations for not changing DM-RS RE numbers are also contained in this method It is interior；

For each antenna port, 2 DM- of same subcarrier will be corresponded on the antenna port in two OFDM symbols RS uses the orthogonal sequence that length is 2 as one group（Shown in table 2）Spread, i.e., as in Figure 14 a- Figure 14 d in circle DM-RS is spread for one group, or, using 2 DM-RS on the antenna port in each OFDM symbol as one group, use Length is 2 orthogonal sequence（Shown in table 2）Spread, i.e., if the DM-RS in Figure 14 a- Figure 14 d in square frame is one group of progress Spread spectrum；

Wherein, discontinuous OFDM symbol situation is only by taking the 2nd and the 4th as an example, when discontinuous OFDM symbol is the 1st, 2,4,5,6 In other combined situations when, the DM-RS RE frequency domain positions in each OFDM symbol repeat no more with Figure 14 d.

In another example when A=2 and DM-RS 1 OFDM symbol of occupancy：The DM-RS RE of first group of antenna port are at one In PRB pair according to subcarrier number from low to high in 1 OFDM symbol corresponding to the 9th, 10 RE, second The DM-RS RE of group antenna port are from low to high in 1 OFDM in a PRB pair according to subcarrier number 3rd, 4 RE corresponding on symbol, the DM-RS RE of the 3rd group of antenna port are to be compiled in a PRB pair according to subcarrier Number from low to high in 1 OFDM symbol corresponding to the 5th, 6 RE, the DM-RS RE of the 4th group of antenna port be In one PRB pair according to subcarrier number from low to high in 1 OFDM symbol corresponding to the 7th, 8 RE, such as Shown in Figure 15 a- Figure 15 b（Can also be other continuous 2 RE positions, such as first group of corresponding 11st, 12 RE, second group Corresponding 1st, 2 RE, the 3rd group of corresponding 9th, 10 RE, the 4th group corresponds to the 3rd, 4 RE, or, first group corresponds to the 11st, 12 RE, second group of corresponding 1st, 2 RE, the 3rd group of corresponding 8th, 9 RE, the 4th group corresponds to the 4th, 5 RE, or, first group corresponds to 11st, 12 RE, second group of corresponding 1st, 2 RE, the 3rd group of corresponding 7th, 8 RE, the 4th group of corresponding 5th, 6 RE, Huo, One group of corresponding 11st, 12 RE, second group of corresponding 2nd, 3 RE, the 3rd group of corresponding 8th, 9 RE, the 4th group corresponding 5th, 6 RE, or, first group of corresponding 10th, 11 RE, second group of corresponding 2nd, 3 RE, the 3rd group of corresponding 8th, 9 RE, the 4th group pair The the 4th, 5 RE, or, first group of corresponding 10th, 11 RE are answered, second group of corresponding 2nd, 3 RE, the 3rd group corresponds to the 7th, 8 RE, 4th group corresponds to the 5th, 6 RE etc.）；The DM-RS only retained in one of OFDM symbol in for example, Figure 14 a- Figure 14 d is obtained Resource mapping method；

For each antenna port, using 2 DM-RS on the antenna port in 1 OFDM symbol as one group, use Length is 2 orthogonal sequence（Shown in table 2）Spread, i.e., expanded as the DM-RS in Figure 15 a- Figure 15 b in circle is one group Frequently；

Wherein, discontinuous OFDM symbol situation is only by taking the 2nd or the 4th OFDM symbol as an example, when 1 OFDM symbol is the 1st, during other symbols in 2,4,5,6, the DM-RS RE frequency domain positions in 1 OFDM symbol are no longer superfluous with Figure 15 a- Figure 15 b State.

Particularly, for the special DM-RS of UE of 1 ~ 4 antenna port：

For 4 antenna ports as 1 group, 4 different antenna ports correspond to identical DM-RS RE, can be used and are adopted in upper figure With in the resource mapping method in method 1, resource mapping method corresponding to any one group of port in two groups of ports, mode is spread With above-mentioned 8 antenna port mode（Use length for 4 frequency expansion sequence）；

Or each two is 1 group in 4 antenna ports, is divided into 2 groups, 4 different antenna ports correspond to identical DM- RS RE, every group is respectively adopted in the every kind of resource mapping method used in upper figure in method 1, any in two groups of antenna ports Resource mapping method corresponding to one group, spread spectrum mode is the same as the 8 antenna port mode（Use length for 4 frequency expansion sequence）, or Person is using 2 DM-RS corresponding to same subcarrier are spread in OFDM symbol described in the frequency expansion sequence that length is 2；It is or, every Group is respectively adopted in every kind of resource mapping method in method 1, resource impact side corresponding to any one group in 4 groups of antenna ports Formula, spread spectrum mode is the same as the 8 antenna port mode（Use length for 2 frequency expansion sequence）；

Preferably, transmitted for 1 ~ 4 antenna port DM-RS, its resource mapping method is not limited to above-mentioned 8 antenna port Mapping mode, for A=6,4,3,2,1 above-mentioned 8 antenna port mapping mode in, do not change the DM- in 1 OFDM symbol RS RE numbers, but the method for changing frequency domain position is also contained in the present invention,

For example, when taking two OFDM symbols for A=3 and DM-RS RE, can also use shown in Figure 16 a- Figure 16 d Each two port is one group in mode, i.e. 4 antenna ports, is divided into 2 groups, the DM-RS RE of first group of antenna port are at one In PRB pair according to subcarrier number from low to high in described two OFDM symbols corresponding to the 2nd, 7,12 RE, the The DM-RSRE of two groups of antenna ports is from low to high described two in a PRB pair according to subcarrier number 1st, 6,11 RE corresponding in OFDM symbol；

For each antenna port, 2 of same subcarrier will be corresponded on the antenna port in two OFDM symbols DM-RS uses the orthogonal sequence that length is 2 as one group（Shown in table 2）Spread；

Wherein, in other combined situations of discontinuous OFDM, DM-RS frequency domain position is schemed with Figure 16 a- on each OFDM 16d is identical, will not be described here.

In another example when taking 1 OFDM symbol for A=4 and DM-RS RE, can also by the way of shown in Figure 17 a, That is each two port is one group in 4 antenna ports, is divided into 2 groups, the DM-RS RE of first group of antenna port are in a PRB In pair according to subcarrier number from low to high in 1 OFDM symbol corresponding to the 3rd, 4,11,12 RE, second The DM-RS RE of group antenna port are from low to high described two in a PRB pair according to subcarrier number 1st, 2,9,10 RE corresponding in OFDM symbol（The DM- that any one group in Figure 17 a is made up of two continuous RE of frequency domain The resource mapping method that RS RE are obtained after frequency domain is translated, and 4 discontinuous RE of occupancy situation also includes respectively In the present invention）；In another example when taking 1 OFDM symbol for A=6 and DM-RS RE, the side shown in Figure 17 a can also be used Each two port is one group in formula, i.e. 4 antenna ports, is divided into 2 groups, the DM-RS RE of first group of antenna port are at one In PRB pair according to subcarrier number from low to high in 1 OFDM symbol corresponding to the 3rd, 4,7,8,11,12 Individual RE, the DM-RS RE of second group of antenna port in a PRB pair according to subcarrier number from low to high in institute 1st, 2,5,6,9,10 RE corresponding to stating in two OFDM symbols（Any one group in Figure 17 a is continuous by two frequency domains The resource mapping method that the DM-RS RE that RE is formed are obtained after frequency domain is translated, and 6 discontinuous RE are taken respectively Situation be also contained in the present invention）；

For each antenna port, using 2 DM-RS on the antenna port in 1 OFDM symbol as one group, use Length is 2 orthogonal sequence（Shown in table 2）Spread；

Wherein, in above-mentioned Figure 17 a only with the 2nd OFDM symbol for corresponding DM-RS RE frequency in the OFDM symbol Domain position is placed on equally applicable in the 1st, 4,5,6 OFDM symbol, can obtain new resource mapping method；

For extending CP, the above method is equally adapted to, and 1 ~ 8 antenna port DM-RS can be supported to transmit, due to extending CP In each time slot（slot）Comprising 6 OFDM symbols, the conventional each time slots of CP include 7 OFDM symbols, specific resource impact Figure can be obtained resource map after last OFDM symbol in each time slot is removed in Fig. 7 a ~ 17b, and by when Domain or adjacent or neighbouring 2 DM-RS of frequency domain are one group, are spread using the orthogonal sequence that length is 2.

Particularly, when extend only support that 2 antenna ports transmit under CP when, can only select the resource mapping method of the above method In mapping resource corresponding to 2 antenna ports carry out DM-RS mappings, preferably, the DM-RS mapping resources of two antenna ports It is identical, for example, when A=4 and DM-RS two OFDM symbols of occupancy, the resource impact side as shown in Figure 18 a- Figure 18 c also can be used Formula, wherein, when two OFDM symbols are the 4th and the 5th or are discrete two OFDM symbols, in each OFDM symbol DM-RS RE frequency domain positions are identical with Figure 18 a- Figure 18 c, repeat no more；A=3,2 situation are similar to A=4, are accorded with two OFDM Reducing 1 or 2 RE of corresponding same sub-carrier on number simultaneously can obtain, it is preferred that reduce the RE in frequency domain centre position；A= When 4 and DM-RS takes 1 OFDM symbol, resource mapping method as shown in figure 19a, A=6 and DM-RS occupancy 1 also can be used During OFDM symbol, resource mapping method as shown in fig. 19b also can be used, wherein, when two OFDM symbols be the 1st 45 when, DM-RS frequency domain positions on the symbol are identical with Figure 19 a, Figure 19 b, will not be described here.

It should be noted that：Above-mentioned antenna port packet mode can be not limited to the packet mode shown in figure, any Antenna port packet mode may be suitable for the resource mapping method shown in figure, for example, it is also possible to by port 7,8,9,10 Be divided into 1 group, port 11,12,13,14 points be 1 group, as long as UE antenna port is grouped with base station and every group of antenna port with The corresponding relation of resource mapping method in figure understands consistent；It is constant in DM-RS RE numbers, change in above-described embodiment The other modes of frequency domain mapping position are also contained in this method.

It should be noted that：In said process, when according to maximum support 8 antenna ports define DM-RS method for mapping resource When, transmitted for the UE and DM-RS of base station side, the DM-RS antenna port number actually used in present sub-frame can be 1 end Mouthful, such as port 7 or port 8, or v port, such as 7 ~ 7+v of port, v are the positive integer more than 1 less than or equal to 7；Work as UE When being less than 8 with the DM-RS antenna port number that base station actually uses when transmitting DM-RS, according to 8 antenna port different groupings The undefined DM-RS method for mapping resource of mode, such as the method for mapping resource in Fig. 7 a ~ Figure 15 b, using real in this method Method for mapping resource corresponding to border transmission DM-RS antenna port, resource impact is carried out to DM-RS（Base station side）And reception（UE Side）, such as then provided in present sub-frame during the only applicable transmission of antenna port 7 and 8 DM-RS only according to corresponding to antenna port 7 and 8 Source mapping method carries out DM-RS mappings（Base station side）And reception（UE sides）；For according to maximum 4 ports or maximum 2 port definitions The situation of DM-RS method for mapping resource, it can also support that the DM-RS less than maximum port number is transmitted, similar said process is no longer superfluous State.

Referring to Figure 20, the embodiment of the present invention provides a kind of base station, and the base station includes：

Transfer resource determining unit 201, for determining to be used for the physical resource for transmitting DM-RS in present sub-frame；

DM-RS map units 202, for the DM-RS resource mapping methods according to each DM-RS antenna port, respectively will DM-RS corresponding to each DM-RS antenna port in present sub-frame is mapped to the DM-RS antenna port and is used to transmit described On DM-RS physical resource on corresponding DM-RS resource units RE, DM-RS RE corresponding to each DM-RS antenna port For be different from the top n orthogonal frequency division multiplex OFDM symbol in the subframe where synchronous transmission of signal one of OFDM symbol or RE in two OFDM symbols；Wherein N is the integer not less than 1；

Transmission unit 203, for the physical resource for being used to transmit DM-RS in the burst, by being used in the subframe Transmit DM-RS antenna port to terminal send resource impact after DM-RS.

Further, the DM-RS map units 202 are specifically used for：For conventional cyclic prefix CP, determine the N's Maximum occurrences are 6；For extending CP, the maximum occurrences for determining the N are 5；Or

For conventional CP and extension CP, the maximum occurrences for determining the N are 3.

Further, the DM-RS map units 202 are specifically used for：In TDD system, the son is determined Frame is the special subframe that special subframe configuration 9 is corresponded under conventional CP, or to correspond to the special son of special subframe configuration 7 under extension CP Frame；Or

Determine the subframe for the descending sub frame in FDD system；Or

In a tdd system, it is corresponding other special sons in addition to special subframe configuration 9 under conventional CP to determine the subframe The special subframe of frame configuration, or to correspond to the special of other special subframes configuration in addition to special subframe configuration 7 under extension CP Subframe；Or

In a tdd system, it is that the special subframe of any special subframe configuration is corresponded under conventional CP to determine the subframe, or is The special subframe of any special subframe configuration is corresponded under extension CP.

Further, the transmission unit 203 is additionally operable to：

Synchronous letter is transmitted when the subframe is synchronous transmission of signal subframe, in the 3rd OFDM symbol in the burst Number.

Further, the DM-RS map units 202 are specifically used for：When corresponding to each DM-RS antenna port DM-RS RE are two OFDM symbols of OFDM symbol where being different from synchronous transmission of signal in the top n OFDM symbol in the subframe During RE on number, determine described two OFDM symbols for continuous or discrete OFDM symbol；Or

When DM-RS RE corresponding to each DM-RS antenna port are difference in the top n OFDM symbol in the subframe Where the synchronous transmission of signal during RE in an OFDM symbol of OFDM symbol, determine one OFDM symbol for before described Any one OFDM symbol in N number of OFDM symbol in addition to OFDM symbol where synchronous transmission of signal.

Further, the DM-RS map units 202 are further used for：It is the son to determine described two OFDM symbols The 1st OFDM symbol and the 2nd OFDM symbol in frame, or be the 4th OFDM symbol in the subframe and the 5th OFDM symbol Number, or be the 5th OFDM symbol and the 6th OFDM symbol in the subframe, or be the 2nd OFDM symbol in the subframe Or it is the 4th OFDM symbol and the 6th OFDM symbol in the subframe with the 4th OFDM symbol, or in the subframe The discontinuous OFDM symbol of any two in 1st, 2,4,5,6 OFDM symbol；

Determine one OFDM symbol be the subframe in the 1st OFDM symbol, the 2nd OFDM symbol, the 4th Any one in OFDM symbol, the 5th OFDM symbol, the 6th OFDM symbol.

Further, the DM-RS map units 202 are specifically used for：Determine corresponding to each DM-RS antenna port DM-RS RE, it is each PRB pair bags during the PRB pair for being used to transmit corresponding to DM-RS physical resource gather A contained numbers different the subcarriers corresponding RE in one or two OFDM symbols, wherein A and is more than 1 and is less than 12 integer.

Further, the DM-RS map units 202 are further used for：

When supporting maximum 8 DM-RS antenna ports, each DM-RS antenna port pair is determined as follows The DM-RS RE answered：

Further, when 8 DM-RS antenna ports are divided into 2 groups by the DM-RS map units 202, the DM- RS map units 202 are further used for：

When A=6 and when DM-RS is mapped into two OFDM symbols, determine that the DM-RS antenna port in a packet is corresponding DM-RS RE be to be accorded with each PRB pair according to the order of subcarrier number from low to high in described two OFDM 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE corresponding on number；Determine DM-RS days in another packet DM-RS RE corresponding to line end mouth are described in each PRB pair according to subcarrier number order from low to high 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE corresponding in two OFDM symbols；Or

When A=4 and when DM-RS is mapped into one or two OFDM symbol, as follows 1 to one in method 5 Individual method determine two packet in DM-RS antenna port corresponding to DM-RS RE：

Method 1：It is in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in a packet According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to 12-b-a, 12-b + 1-a, 12-b and the 12-b+1 RE；Determine DM-RS RE corresponding to the DM-RS antenna port in another packet Be in each PRB pair according to subcarrier number order from low to high in one or two OFDM symbols it is right B-th, b+1, b+a answered and the b+1+a RE；Wherein, as b=1, a=8 or 7 or 6 or 4 or 3 or 2, when b=2 When, a=6 or 5 or 3 or 2, as b=3, a=4 or 2；

Method 2：It is in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in a packet According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 5th, the 6th, the 11st Individual and the 12nd RE；It is each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in another packet According to subcarrier number from low to high in one or two OFDM symbols corresponding to the 3rd, the 4th, the 9th and 10th RE, or, it is one or two in each PRB pair according to subcarrier number order from low to high 2nd, the 3rd, the 8th and the 9th RE corresponding in individual OFDM symbol；

Method 3：With in each PRB pair according to subcarrier number order from low to high one or two 1st, the 4th, the 7th and the 10th RE corresponding in individual OFDM symbol is one group of DM-RS RE, the 3rd, the 6th, the 9th It is one group of DM-RS RE with the 12nd RE, the 2nd, the 5th, the 8th and the 11st RE is one group of DM-RS RE, determines one point DM-RS RE corresponding to DM-RS antenna port in group are one group in 3 groups of DM-RS RE；Determine in another packet DM-RS RE corresponding to DM-RS antenna port are another group in 3 groups of DM-RS RE；

Method 4：It is each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in a packet According to subcarrier number order from low to high in one or two OFDM symbols corresponding to 12-b-c+1-a, 12-b+1-a, 12-b-c+1 and the 12-b+1 RE；Determine that the DM-RS antenna port in another packet is corresponding DM-RS RE be one or two in each PRB pair according to subcarrier number order from low to high B-th corresponding in OFDM symbol, b+c is individual, b+a is individual and the b+c+a RE；Wherein, b=1, c=3, a=6, or, b=1, c =2, a=4, or b=2, c=2, a=4；

Method 5：It is in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in a packet According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 2nd, the 5th, the 8th Individual and the 11st RE；It is each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in another packet According to subcarrier number order from low to high in one or two OFDM symbols corresponding to the 1st, the 4th, the 7th In individual and the 10th RE, or each PRB pair according to subcarrier number order from low to high one or 3rd, the 6th, the 9th and the 12nd RE corresponding in two OFDM symbols；Or

When A=2 and when DM-RS is mapped into two OFDM symbols, determine that the DM-RS antenna port in a packet is corresponding DM-RS RE be in described two OFDM symbols in each PRB pair according to subcarrier number order from low to high 12-b+1-a and the 12-b+1 RE corresponding to upper；Determine DM-RS corresponding to the DM-RS antenna port in another packet RE be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to B-th and the b+a RE, wherein, as b=1, a is 1 to 10 to include any integer including 1 and 10, as b=2, a 1 Include any integer in addition to 9 including 1 and 10 to 10, as b=3, a be 1 to 9 include including 1 and 9 except 7 Any integer in addition, as b=4, a is 1 to 8 to include any integer in addition to 5 including 1 and 8, and as b=5, a is 1 to 7 includes any integer in addition to 3 including 1 and 7.

Further, the base station also includes：

First spectrum-spreading unit 204, for the physical resource for being used to transmit DM-RS in the burst, by the subframe For before transmitting the DM-RS after DM-RS antenna port sends the resource impact to terminal：

Further, when 8 DM-RS antenna ports are divided into 4 groups by the DM-RS map units, the DM-RS reflects Unit 202 is penetrated to be further used for：

When A=3 and when DM-RS is mapped into two OFDM symbols, the DM-RS antenna port pair in first packet is determined The DM-RS RE answered are in described two OFDM in each PRB pair according to subcarrier number order from low to high 4th, the 8th and the 12nd RE corresponding on symbol；Determine DM-RS corresponding to the DM-RS antenna port in second packet RE is to be corresponded in each PRB pair according to the order of subcarrier number from low to high in described two OFDM symbols The 1st, the 5th and the 9th RE；It is described every to determine DM-RSRE corresponding to the DM-RS antenna port in the 3rd packet In individual PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 3rd, the 7th With the 11st RE；It is in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in the 4th packet According to subcarrier number order from low to high in described two OFDM symbols corresponding to the 2nd, the 6th and the 10th RE；Or

When A=2 and when DM-RS is mapped into one or two OFDM symbol, as follows 1 to one in method 3 Individual method determine four packet in DM-RS antenna port corresponding to DM-RS RE：

Method 1：By in each PRB pair according to subcarrier number order from low to high one or two In individual OFDM symbol corresponding to b-th and the b+a RE as one group, obtain（12-a）Group RE, wherein, a includes 2 for 2 to 8 With any integer including 8, b arrives for 1（12-a）Include 1 He（12-a）Any integer inside；Determine first, second, third and fourth DM-RS RE corresponding to DM-RS antenna port in individual packet are respectively described（12-a）One group of RE in group RE, each packet The corresponding RE groups are different；

Method 2：Determine that DM-RS RE corresponding to the DM-RS antenna port in first packet are in each PRB In pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to b-th and b+ 1 RE；Determine DM-RS RE corresponding to the DM-RS antenna port in second packet be in each PRB pair according to The order of subcarrier number from low to high is 12-b and 12-b+1 corresponding in one or two OFDM symbols RE；It is according to son in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in the 3rd packet The order of carrier index from low to high is b+a and the b+1+a RE corresponding in one or two OFDM symbols；Really DM-RS RE corresponding to DM-RS antenna port in fixed 4th packet are to be compiled in each PRB pair according to subcarrier Order number from low to high is 12-b-a and the 12-b+1-a RE corresponding in one or two OFDM symbols；Its In, b=1, a=2 or 3 or 4, or, b=2, a=2 or 3, or b=3, a=2；

Method 3：Determine that DM-RS RE corresponding to the DM-RS antenna port in first packet are in each PRB In pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to b-th and b+ 1 RE；Determine DM-RS RE corresponding to the DM-RS antenna port in second packet be in each PRB pair according to The order of subcarrier number from low to high is b+a and the b+a+1 RE corresponding in one or two OFDM symbols； It is according to subcarrier in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in the 3rd packet The order of numbering from low to high is b+2a and the b+2a+1 RE corresponding in one or two OFDM symbols；It is determined that DM-RS RE corresponding to DM-RS antenna port in 4th packet are according to subcarrier number in each PRB pair Order from low to high is b+3a and the b+3a+1 RE corresponding in one or two OFDM symbols；Wherein, a= 2, b be 1 to 5 to include any integer including 1 and 5, or, a=3, b=1 or 2.

Further, the DM-RS map units 202 are further used for：

When supporting maximum 4 DM-RS antenna ports, 4 DM-RS antenna ports are divided into 2 groups, each packet includes 2 DM-RS antenna ports, 2 DM-RS antenna ports in same packet correspond to identical DM-RS RE, and according to as follows Method determines DM-RS RE corresponding to each DM-RS antenna port：

When A=3 and when DM-RS is mapped into two OFDM symbols：Determine that the DM-RS antenna port in a packet is corresponding DM-RS RE be to be accorded with each PRB pair according to the order of subcarrier number from low to high in described two OFDM 2nd, the 7th and the 12nd RE corresponding on number, determine DM-RS RE corresponding to the DM-RS antenna port in another packet Be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to 1st, the 6th and the 11st RE；Or

When A=4 and when DM-RS is mapped into an OFDM symbol：Determine that the DM-RS antenna port in a packet is corresponding DM-RS RE be to be accorded with each PRB pair according to the order of subcarrier number from low to high in described two OFDM 3rd, the 4th, the 11st and the 12nd RE corresponding on number, determine corresponding to the DM-RS antenna port in another packet DM-RS RE are in described two OFDM symbols in each PRB pair according to subcarrier number order from low to high 1st, the 2nd, the 9th and the 10th RE corresponding to upper；Or

When A=6 and when DM-RS is mapped into one or two OFDM symbol：Determine the DM-RS antenna ends in a packet DM-RS RE corresponding to mouthful are one in each PRB pair according to subcarrier number order from low to high Or the 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE corresponding in two OFDM symbols；Determine another packet In DM-RS antenna port corresponding to DM-RS RE be in each PRB pair according to subcarrier number from low to high Order the 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE corresponding in one or two OFDM symbols.

Further, the DM-RS map units 202 are further used for：

When supporting maximum 2 DM-RS antenna ports, it is determined that DM-RS RE corresponding to each DM-RS antenna port are identical, And DM-RS RE corresponding to each DM-RS antenna port are determined as follows：

When A=2 and when DM-RS is mapped into one or two OFDM symbol：It is determined that corresponding to each DM-RS antenna port DM-RS RE are one or two in each PRB pair according to subcarrier number order from low to high B-th and the b+a RE corresponding in OFDM symbol, wherein, a includes any integer including 1 and 11, b 1 for 1 to 11 Arrive（12-a）Include 1 He（12-a）Any integer inside；Or

When A=3 and when DM-RS is mapped into two OFDM symbols：It is determined that DM-RS corresponding to each DM-RS antenna port RE is to be corresponded in each PRB pair according to the order of subcarrier number from low to high in described two OFDM symbols The 2nd, the 7th and the 12nd RE, or determine that DM-RS RE corresponding to each DM-RS antenna port are in each PRB In pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 1st, the 6th and the 11st Individual RE；Or

When A=4 and when DM-RS is mapped into one or two OFDM symbol：It is determined that corresponding to each DM-RS antenna port DM-RS RE are one or two in each PRB pair according to subcarrier number order from low to high B-th corresponding in OFDM symbol, b+a is individual, b+2a is individual and the b+3a RE, wherein, a=1, b include 1 and 9 for 1 to 9 Any integer inside, or a=2, b are 1 to 6 any integer including 1 and 6, or a=3, b=1 or 2 or 3 or 4；Or really DM-RS RE corresponding to fixed each DM-RS antenna port be in each PRB pair according to subcarrier number from low to high Order b-th corresponding in one or two OFDM symbols, b+1, b+a and the b+1+a RE, its In, a is 3 to 10 any integer including 3 and 10, is arrived for 1（11-a）Including 1 He（11-a）Any integer inside；Or Person,

When A=6 and when DM-RS is mapped into one or two OFDM symbol：It is determined that corresponding to each DM-RS antenna port DM-RS RE are one or two in each PRB pair according to subcarrier number order from low to high 2nd, the 3rd, the 6th, the 7th, the 10th and the 11st RE corresponding in OFDM symbol.

Further, the base station also includes：

Second spectrum-spreading unit 205, for the physical resource for being used to transmit DM-RS in the burst, by the subframe For before transmitting the DM-RS after DM-RS antenna port sends the resource impact to terminal：

Referring to Figure 21, the embodiment of the present invention also provides a kind of terminal, and the terminal includes：

Transfer resource determining unit 211, for determining to be used for the physical resource for transmitting DM-RS in present sub-frame；

DM-RS acquiring units 212, for the DM-RS resource mapping methods according to each DM-RS antenna port, exist respectively Each DM-RS antenna port in present sub-frame it is described for transmit DM-RS physical resource on corresponding DM-RS resources list DM-RS corresponding to the DM-RS antenna port is obtained on first RE, DM-RS RE corresponding to each DM-RS antenna port are should One or two of OFDM symbol where being different from synchronous transmission of signal in top n orthogonal frequency division multiplex OFDM symbol in subframe RE in OFDM symbol；Wherein N is the integer not less than 1 and no more than 6；

Demodulating unit 213, for the DM-RS according to corresponding to each DM-RS antenna port, to being received on respective antenna port To downlink data be demodulated.

Further, the DM-RS acquiring units 212 are specifically used for：For conventional cyclic prefix CP, determine the N's Maximum occurrences are 6；For extending CP, the maximum occurrences for determining the N are 5；Or

Further, the DM-RS acquiring units 212 are specifically used for：In TDD system, the son is determined Frame is the special subframe that special subframe configuration 9 is corresponded under conventional CP, or to correspond to the special son of special subframe configuration 7 under extension CP Frame；Or

Determine the subframe for the descending sub frame in FDD system；Or

Further, the DM-RS acquiring units 212 are additionally operable to：

Received when the subframe is synchronous transmission of signal subframe, in the 3rd OFDM symbol in the subframe synchronous Signal.

Further, the top n OFDM symbols in DM-RS RE corresponding to each DM-RS antenna port are the subframe When being different from the RE in two OFDM symbols of synchronous transmission of signal place OFDM symbol in number, the DM-RS acquiring units 212 It is specifically used for：Determine described two OFDM symbols for continuous or discrete OFDM symbol；Or

It is different in the top n OFDM symbol during DM-RS RE corresponding to each DM-RS antenna port are the subframe Where the synchronous transmission of signal during RE in an OFDM symbol of OFDM symbol, the DM-RS acquiring units 212 are specifically used In：It is in the top n OFDM symbol in addition to the OFDM symbol where the synchronous transmission of signal to determine one OFDM symbol Any one OFDM symbol.

Further, the DM-RS acquiring units 212 are further used for：It is the son to determine described two OFDM symbols The 1st OFDM symbol and the 2nd OFDM symbol in frame, or be the 4th OFDM symbol in the subframe and the 5th OFDM symbol Number, or be the 5th OFDM symbol and the 6th OFDM symbol in the subframe, or be the 2nd OFDM symbol in the subframe Or it is the 4th OFDM symbol and the 6th OFDM symbol in the subframe with the 4th OFDM symbol, or in the subframe The the 1st, 2,4,5,6 OFDM symbol in the discontinuous OFDM symbol of any two；

Further, the DM-RS acquiring units 212 are specifically used for：Determine corresponding to each DM-RS antenna port DM-RS RE, it is each PRB pair bags during the PRB pair for being used to transmit corresponding to DM-RS physical resource gather A contained numbers different the subcarriers corresponding RE in one or two OFDM symbols, wherein A and is more than 1 and is less than 12 integer.

Further, the DM-RS acquiring units 212 are further used for：

Further, when 8 DM-RS antenna ports are divided into 2 groups by the DM-RS acquiring units 212, the DM- RS acquiring units 212 are further used for：

Method 3：With in each PRB pair according to subcarrier number order from low to high one or two 1st, the 4th, the 7th and the 10th RE corresponding in individual OFDM symbol is one group of DM-RS RE, the 3rd, the 6th, the 9th It is one group of DM-RS RE with the 12nd RE, the 2nd, the 5th, the 8th and the 11st RE is one group of DM-RS RE, determines one DM-RS RE corresponding to DM-RS antenna port in packet are one group in 3 groups of DM-RS RE；Determine in another packet DM-RS antenna port corresponding to DM-RS RE be 3 groups of DM-RS RE in another group；

Method 4：It is in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in a packet According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to 12-b-c+1-a, the 12-b+1-a, 12-b-c+1 and the 12-b+1 RE；Determine corresponding to the DM-RS antenna port in another packet DM-RS RE are in one or two OFDM in each PRB pair according to subcarrier number order from low to high B-th corresponding on symbol, b+c is individual, b+a is individual and the b+c+a RE；Wherein, b=1, c=3, a=6, or, b=1, c=2, a =4, or b=2, c=2, a=4；

When A=2 and when DM-RS is mapped into two OFDM symbols, determine that the DM-RS antenna port in a packet is corresponding DM-RS RE be in described two OFDM symbols in each PRB pair according to subcarrier number order from low to high 12-b+1-a and the 12-b+1 RE corresponding to upper；Determine DM-RS corresponding to the DM-RS antenna port in another packet RE be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to B-th and the b+a RE, wherein, as b=1, a is 1 to 10 to include any integer including 1 and 10, as b=2, a 1 Include any integer in addition to 9 including 1 and 10 to 10, as b=3, a be 1 to 9 include including 1 and 9 except 7 Any integer in addition, as b=4, a is 1 to 8 to include any integer in addition to 5 including 1 and 8, as b=5, a Include any integer in addition to 3 including 1 and 7 for 1 to 7.

Further, the DM-RS acquiring units 212 are used for：

Further, when 8 DM-RS antenna ports are divided into 4 groups by the DM-RS acquiring units 212, the DM- RS acquiring units 212 are further used for：

When A=3 and when DM-RS is mapped into two OFDM symbols, the DM-RS antenna port pair in first packet is determined The DM-RS RE answered are in described two OFDM in each PRB pair according to subcarrier number order from low to high 4th, the 8th and the 12nd RE corresponding on symbol；Determine DM-RS corresponding to the DM-RS antenna port in second packet RE is to be corresponded in each PRB pair according to the order of subcarrier number from low to high in described two OFDM symbols The 1st, the 5th and the 9th RE；Determine that DM-RS RE corresponding to the DM-RS antenna port in the 3rd packet are described In each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 3rd, the 7th Individual and the 11st RE；Determine that DM-RS RE corresponding to the DM-RS antenna port in the 4th packet are in each PRB In pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 2nd, the 6th and the 10th Individual RE；Or

Further, the DM-RS acquiring units 212 are further used for：

Further, the DM-RS acquiring units 212 are used for：

The present invention program can apply on NCT.

To sum up, beneficial effects of the present invention include：

The present invention is with reference to method according to embodiments of the present invention, equipment（System）And the flow of computer program product Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.

These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or The function of being specified in multiple square frames.

These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.

Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent Select embodiment and fall into having altered and changing for the scope of the invention.

Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these changes and modification.

Claims

1. a kind of user's dedicated demodulation reference signal DM-RS transmission methods, it is characterised in that this method includes：

Network side is according to the DM-RS resource mapping methods of each DM-RS antenna port, respectively by each DM- in present sub-frame It is corresponding on the physical resource for transmitting DM-RS that DM-RS corresponding to RS antenna ports is mapped to the DM-RS antenna port DM-RS resource units RE on, DM-RS RE corresponding to each DM-RS antenna port are that the top n in the subframe is orthogonal RE where being different from synchronous transmission of signal in frequency division multiplex OFDM symbol in one or two OFDM symbol of OFDM symbol；Its Middle N is the integer not less than 1；

Wherein, when supporting maximum 8 DM-RS antenna ports, DM-RS RE corresponding to each DM-RS antenna port be by Determined according to following method：8 DM-RS antenna ports are divided into 2 groups, each packet includes 4 DM-RS antenna ports, together 4 DM-RS antenna ports in one packet correspond to identical DM-RS RE；For each packet, in each Physical Resource Block To determining the different subcarrier of A numbering in PRB pair, the subcarrier determined for different grouping is different；Will be in each PRB The A subcarrier determined in pair in one or two OFDM symbols corresponding RE as the DM-RS in corresponding be grouped Antenna port corresponding DM-RS RE in each PRB pair；Or 8 DM-RS antenna ports are divided into 4 groups, each Packet includes 2 DM-RS antenna ports, and 2 DM-RS antenna ports in same packet correspond to identical DM-RS RE；It is right In each packet, the different subcarrier of A numbering is determined in each PRB pair, be the subcarrier of different grouping determination not Together；Using the A subcarrier determined in each PRB pair in one or two OFDM symbols corresponding RE as pair DM-RS antenna port in should the being grouped corresponding DM-RS RE in each PRB pair；

Or when supporting maximum 4 DM-RS antenna ports, 4 DM-RS antenna ports are divided into 2 groups, each packet bag Containing 2 DM-RS antenna ports, 2 DM-RS antenna ports in same packet correspond to identical DM-RS RE, and according to such as Lower method determines DM-RS RE corresponding to each DM-RS antenna port：Two OFDM symbols are mapped to as A=3 and by DM-RS When：DM-RS RE corresponding to DM-RS antenna port in one packet are to be compiled in each PRB pair according to subcarrier The 2nd, the 7th and the 12nd RE corresponding in described two OFDM symbols of order number from low to high, in another packet DM-RS antenna port corresponding to DM-RS RE be according to subcarrier number from low to high suitable in each PRB pair Sequence the 1st, the 6th and the 11st RE corresponding in described two OFDM symbols；Or it is mapped to as A=4 and by DM-RS During one OFDM symbol：DM-RS RE corresponding to DM-RS antenna port in one packet are in each PRB pair According to the order of subcarrier number from low to high in described two OFDM symbols corresponding to the 3rd, the 4th, the 11st and the 12 RE, DM-RS RE corresponding to the DM-RS antenna port in another packet are according to son in each PRB pair The order of carrier index from low to high the 1st, the 2nd, the 9th and the 10th RE corresponding in described two OFDM symbols； Or as A=6 and when DM-RS is mapped into one or two OFDM symbol：DM-RS antenna port in one packet is corresponding DM-RS RE be one or two in each PRB pair according to subcarrier number order from low to high 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE corresponding in OFDM symbol；DM-RS in another packet DM-RS RE corresponding to antenna port are in institute in each PRB pair according to subcarrier number order from low to high 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE corresponding to stating in one or two OFDM symbol；

Or when supporting maximum 2 DM-RS antenna ports, DM-RS RE are identical corresponding to each DM-RS antenna port, and DM-RS RE corresponding to each DM-RS antenna port are determined as follows：One or two are mapped to as A=2 and by DM-RS During individual OFDM symbol：DM-RS RE corresponding to each DM-RS antenna port are according to subcarrier in each PRB pair The order of numbering from low to high is corresponding b-th and the b+a RE in one or two OFDM symbols, wherein, a 1 Include any integer including 1 and 11 to 11, b be 1 include 1 and (12-a) to (12-a) including any integer；Or As A=3 and when DM-RS is mapped into two OFDM symbols：DM-RS RE corresponding to each DM-RS antenna port are described every In individual PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 2nd, the 7th With the 12nd RE, or DM-RS RE corresponding to each DM-RS antenna port are according to subcarrier in each PRB pair The order of numbering from low to high the 1st, the 6th and the 11st RE corresponding in described two OFDM symbols；Or work as A=4 And when DM-RS is mapped into one or two OFDM symbol：DM-RS RE corresponding to each DM-RS antenna port are described every In individual PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to b Individual, b+a, b+2a and the b+3a RE, wherein, a=1, b are 1 to 9 any integer including 1 and 9, or a= 2, b be 1 to 6 any integer including 1 and 6, or a=3, b=1 or 2 or 3 or 4；Or each DM-RS antenna port pair The DM-RS RE answered are one or two in each PRB pair according to subcarrier number order from low to high B-th corresponding in individual OFDM symbol, b+1, b+a and the b+1+a RE, wherein, a be 3 to 10 including 3 and 10 Interior any integer, b are 1 any integer to (11-a) including 1 and (11-a)；Or mapped as A=6 and by DM-RS During to one or two OFDM symbol：DM-RS RE corresponding to each DM-RS antenna port are in each PRB pair According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 2nd, the 3rd, the 6th Individual, the 7th, the 10th and the 11st RE；

Wherein A is the integer more than 1 and less than 12；

Network side is used for the physical resource for transmitting DM-RS in the burst, passes through the antenna for being used to transmit DM-RS in the subframe Port to terminal send resource impact after DM-RS.

2. the method as described in claim 1, it is characterised in that for conventional cyclic prefix CP, the maximum occurrences of the N are 6； For extending CP, the maximum occurrences of the N are 5；Or

Maximum occurrences for conventional CP and extension CP, the N are 3.

3. the method as described in claim 1, it is characterised in that in TDD system, the subframe is under conventional CP The special subframe of corresponding special subframe configuration 9, or to correspond to the special subframe of special subframe configuration 7 under extension CP；Or

The subframe is the descending sub frame in FDD system；Or

In a tdd system, the subframe is corresponding other special subframes configuration in addition to special subframe configuration 9 under conventional CP Special subframe, or the special subframe for corresponding other special subframes configuration in addition to special subframe configuration 7 under extension CP；Or Person,

In a tdd system, the subframe is that the special subframe of any special subframe configuration is corresponded under conventional CP, or under extension CP The special subframe of corresponding any special subframe configuration.

4. the method as described in claim 1, it is characterised in that if the subframe is synchronous transmission of signal subframe, synchronous letter Transmitted in the 3rd OFDM symbol number in the burst.

5. the method as described in claim 1, it is characterised in that DM-RS RE corresponding to each DM-RS antenna port are RE where being different from synchronous transmission of signal in top n OFDM symbol in the subframe in two OFDM symbols of OFDM symbol When, described two OFDM symbols are continuous or discrete OFDM symbol；Or

DM-RS RE corresponding to each DM-RS antenna port are to be different from synchronously in the top n OFDM symbol in the subframe When signal transmits the RE in an OFDM symbol of place OFDM symbol, one OFDM symbol is that the top n OFDM is accorded with Any one OFDM symbol in number in addition to OFDM symbol where synchronous transmission of signal.

6. method as claimed in claim 5, it is characterised in that described two OFDM symbols are the 1st in the subframe OFDM symbol and the 2nd OFDM symbol, or be the 4th OFDM symbol and the 5th OFDM symbol in the subframe, or be described The 5th OFDM symbol and the 6th OFDM symbol in subframe, or be the 2nd OFDM symbol and the 4th OFDM in the subframe Symbol, or be the 4th OFDM symbol and the 6th OFDM symbol in the subframe, or be the 1st, 2,4,5,6 in the subframe The discontinuous OFDM symbol of any two in individual OFDM symbol；

One OFDM symbol be the subframe in the 1st OFDM symbol, the 2nd OFDM symbol, the 4th OFDM symbol, Any one in 5th OFDM symbol, the 6th OFDM symbol.

7. the method as described in claim 1, it is characterised in that DM-RS RE corresponding to each DM-RS antenna port, be A numbering described to be used to transmit in the PRB pair set corresponding to DM-RS physical resource, that each PRB pair are included Different subcarriers corresponding RE in one or two OFDM symbols.

8. the method as described in claim 1, it is characterised in that 8 DM-RS antenna ports are divided into 2 groups, each packet bag Containing 4 DM-RS antenna ports, 4 DM-RS antenna ports in same packet correspond to identical DM-RS RE；For each Packet, the different subcarrier of A numbering is determined in each PRB pair, the subcarrier determined for different grouping is different；Will be The A subcarrier determined in each PRB pair corresponding RE in one or two OFDM symbols is used as in corresponding packet DM-RS antenna port in each PRB pair corresponding DM-RS RE, specifically include：

As A=6 and when DM-RS is mapped into two OFDM symbols：DM-RS corresponding to DM-RS antenna port in one packet RE is to be corresponded in each PRB pair according to the order of subcarrier number from low to high in described two OFDM symbols The 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE；Corresponding to DM-RS antenna port in another packet DM-RS RE are in described two OFDM symbols in each PRB pair according to subcarrier number order from low to high 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE corresponding to upper；Or

As A=4 and when DM-RS is mapped into one or two OFDM symbol, DM-RS RE determination mode includes following method 1 to one in method 5：

Method 1：DM-RS RE corresponding to DM-RS antenna port in one packet are according to sub- load in each PRB pair The order of ripple numbering from low to high is 12-b-a corresponding in one or two OFDM symbols, 12-b+1-a is individual, 12-b and the 12-b+1 RE；DM-RS RE corresponding to DM-RS antenna port in another packet are described each In PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to b-th, B+1, b+a and the b+1+a RE；Wherein, as b=1, a=8 or 7 or 6 or 4 or 3 or 2, as b=2, a=6 Or 5 or 3 or 2, as b=3, a=4 or 2；

Method 2：DM-RS RE corresponding to DM-RS antenna port in one packet are according to sub- load in each PRB pair The order of ripple numbering from low to high is the 5th, the 6th, the 11st and the 12nd corresponding in one or two OFDM symbols Individual RE；DM-RS RE corresponding to DM-RS antenna port in another packet are according to subcarrier in each PRB pair The 3rd, the 4th, the 9th and the 10th RE corresponding in one or two OFDM symbols of numbering from low to high, or Person, be in each PRB pair according to subcarrier number order from low to high in one or two OFDM symbols Corresponding 2nd, the 3rd, the 8th and the 9th RE；

Method 3：With in each PRB pair according to subcarrier number order from low to high one or two 1st, the 4th, the 7th and the 10th RE corresponding in OFDM symbol is one group of DM-RS RE, the 3rd, the 6th, the 9th and 12nd RE is one group of DM-RS RE, and the 2nd, the 5th, the 8th and the 11st RE is one group of DM-RS RE, in a packet DM-RS RE corresponding to DM-RS antenna port are one group in 3 groups of DM-RS RE；DM-RS antennas in another packet DM-RS RE corresponding to port are another group in 3 groups of DM-RS RE；

Method 4：DM-RS RE corresponding to DM-RS antenna port in one packet are according to sub- load in each PRB pair The order of ripple numbering from low to high 12-b-c+1-a, 12-b+1-a corresponding in one or two OFDM symbols Individual, 12-b-c+1 and the 12-b+1 RE；DM-RS RE corresponding to DM-RS antenna port in another packet are institutes State in each PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to B-thth, b+c, b+a and the b+c+a RE；Wherein, b=1, c=3, a=6, or, b=1, c=2, a=4, or b =2, c=2, a=4；

Method 5：DM-RS RE corresponding to DM-RS antenna port in one packet are according to sub- load in each PRB pair The order of ripple numbering from low to high is the 2nd, the 5th, the 8th and the 11st corresponding in one or two OFDM symbols Individual RE；DM-RS RE corresponding to DM-RS antenna port in another packet are according to subcarrier in each PRB pair The order of numbering from low to high is the 1st, the 4th, the 7th and the 10th corresponding in one or two OFDM symbols According to subcarrier number order from low to high in one or two OFDM symbols in RE, or each PRB pair 3rd, the 6th, the 9th and the 12nd RE corresponding to upper；Or

As A=2 and when DM-RS is mapped into two OFDM symbols：DM-RS corresponding to DM-RS antenna port in one packet RE be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to 12-b+1-a and the 12-b+1 RE；DM-RS RE corresponding to DM-RS antenna port in another packet are described every In individual PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to b-th and b+ A RE, wherein, as b=1, a is 1 to 10 include any integer including 1 and 10, and as b=2, a includes for 1 to 10 Any integer in addition to 9 including 1 and 10, as b=3, a includes the appointing in addition to 7 including 1 and 9 for 1 to 9 One integer, as b=4, a is 1 to 8 include any integer in addition to 5 including 1 and 8, and as b=5, a is in 1 to 7 Any integer in addition to 3 including 1 and 7.

9. the method as described in any in claim 1 or 7~8, it is characterised in that be used to transmit in the burst in network side On DM-RS physical resource, after sending the resource impact to terminal by being used to transmitting DM-RS antenna port in the subframe DM-RS before, further comprise：

When A is not 4 integral multiple and DM-RS is mapped in two OFDM symbols：

For each DM-RS antenna port, by adjacent or distance is most in described two OFDM symbols in the DM-RS antenna port 4 DM-RS on two near subcarriers use the orthogonal sequence point that length corresponding to the antenna port is 4 as one group It is other that spread processing is carried out to every group of DM-RS；Or

When A is 4 integral multiple：

For each DM-RS antenna port, phase in DM-RS OFDM symbol will be mapped with each in the DM-RS antenna port 4 DM-RS on 4 adjacent or closest subcarriers are 4 just as one group, and using length corresponding to the antenna port Sequence is handed over to carry out spread processing to every group of DM-RS respectively.

10. the method as described in claim 1, it is characterised in that 8 DM-RS antenna ports are divided into 4 groups, each packet Comprising 2 DM-RS antenna ports, 2 DM-RS days lower ports in same packet correspond to identical DM-RS RE；For every Individual packet, the different subcarrier of A numbering is determined in each PRB pair, the subcarrier determined for different grouping is different；Will The A subcarrier determined in each PRB pair corresponding RE in one or two OFDM symbols is grouped as corresponding In DM-RS antenna port during corresponding DM-RS RE, specifically included in each PRB pair：

As A=3 and when DM-RS is mapped into two OFDM symbols：

DM-RS RE corresponding to DM-RS antenna port in first packet are according to subcarrier in each PRB pair The order of numbering from low to high the 4th, the 8th and the 12nd RE corresponding in described two OFDM symbols；

DM-RS RE corresponding to DM-RS antenna port in second packet are according to subcarrier in each PRB pair The order of numbering from low to high the 1st, the 5th and the 9th RE corresponding in described two OFDM symbols；

DM-RS RE corresponding to DM-RS antenna port in 3rd packet are according to subcarrier in each PRB pair The order of numbering from low to high the 3rd, the 7th and the 11st RE corresponding in described two OFDM symbols；

DM-RS RE corresponding to DM-RS antenna port in 4th packet are according to subcarrier in each PRB pair The order of numbering from low to high the 2nd, the 6th and the 10th RE corresponding in described two OFDM symbols；Or

As A=2 and when DM-RS is mapped into one or two OFDM symbol, including following method 1 is to one in method 3：

Method 1：By in each PRB pair according to subcarrier number order from low to high one or two Corresponding in OFDM symbol b-th and the b+a RE as one group, obtain (12-a) group RE, wherein, a includes 2 Hes for 2 to 8 Any integer including 8, b include 1 and any integer including (12-a) for 1 to (12-a)；First, second, third and fourth packet In DM-RS antenna port corresponding to DM-RS RE be respectively one group of RE in (12-a) group RE, corresponding to each packet The RE groups are different；

Method 2：DM-RS RE corresponding to DM-RS antenna port in first packet be in each PRB pair according to The order of subcarrier number from low to high is b-th and the b+1 RE corresponding in one or two OFDM symbols；Second DM-RS RE corresponding to DM-RS antenna port in individual packet are from low in each PRB pair according to subcarrier number To high order corresponding 12-b and the 12-b+1 RE in one or two OFDM symbols；In 3rd packet DM-RS antenna port corresponding to DM-RS RE be according to subcarrier number from low to high suitable in each PRB pair Sequence is b+a and the b+1+a RE corresponding in one or two OFDM symbols；DM-RS days in 4th packet DM-RS RE corresponding to line end mouth are described in each PRB pair according to subcarrier number order from low to high 12-b-a and the 12-b+1-a RE corresponding in one or two OFDM symbol；Wherein, b=1, a=2 or 3 or 4, or Person, b=2, a=2 or 3, or b=3, a=2；

Method 3：DM-RS RE corresponding to DM-RS antenna port in first packet be in each PRB pair according to The order of subcarrier number from low to high is b-th and the b+1 RE corresponding in one or two OFDM symbols；Second DM-RS RE corresponding to DM-RS antenna port in individual packet are from low in each PRB pair according to subcarrier number To high order corresponding b+a and the b+a+1 RE in one or two OFDM symbols；In 3rd packet DM-RS RE corresponding to DM-RS antenna port are the orders according to subcarrier number from low to high in each PRB pair B+2a and the b+2a+1 RE corresponding in one or two OFDM symbols；DM-RS days in 4th packet DM-RS RE corresponding to line end mouth are described in each PRB pair according to subcarrier number order from low to high B+3a and the b+3a+1 RE corresponding in one or two OFDM symbol；Wherein, a=2, b include 1 and 5 for 1 to 5 Any integer inside, or, a=3, b=1 or 2.

11. the method as described in claim 1 or 10, it is characterised in that be used to transmit DM-RS's in the burst in network side On physical resource, by being used to transmit the DM-RS after DM-RS antenna port sends the resource impact to terminal in the subframe Before, further comprise：

When DM-RS is mapped into two OFDM symbols：

For each DM-RS antenna port, the 2 of same subcarrier will be corresponded on the antenna port in described two OFDM symbols Individual DM-RS is carried out at spread spectrum as one group, and using the orthogonal sequence that length corresponding to the antenna port is 2 to every group of DM-RS Reason；Or

When A is 2 integral multiple：

For each DM-RS antenna port, by 2 DM- on the antenna port in the OFDM symbol for being mapped with DM-RS RS carries out spread processing as one group, and using the orthogonal sequence that length corresponding to the antenna port is 2 to this group of DM-RS.

12. a kind of data demodulation method, it is characterised in that this method includes：

Terminal is according to the DM-RS resource mapping methods of each DM-RS antenna port, each DM-RS in present sub-frame respectively Antenna port it is described for transmit DM-RS physical resource on corresponding DM-RS resource units RE on obtain the DM-RS antennas DM-RS corresponding to port, DM-RS RE corresponding to each DM-RS antenna port are the top n orthogonal frequency in the subframe It is multiplexed the RE in one or two OFDM symbol of OFDM symbol where being different from synchronous transmission of signal in OFDM symbol；Wherein N For the integer not less than 1 and no more than 6；

Or when supporting maximum 2 DM-RS antenna ports, DM-RS RE are identical corresponding to each DM-RS antenna port, and DM-RS RE corresponding to each DM-RS antenna port are determined as follows：One or two are mapped to as A=2 and by DM-RS During individual OFDM symbol：DM-RS RE corresponding to each DM-RS antenna port are according to subcarrier in each PRB pair The order of numbering from low to high is corresponding b-th and the b+a RE in one or two OFDM symbols, wherein, a 1 Include any integer including 1 and 11 to 11, b be 1 include 1 and (12-a) to (12-a) including any integer；Or As A=3 and when DM-RS is mapped into two OFDM symbols：DM-RS RE corresponding to each DM-RS antenna port are described every In individual PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 2nd, the 7th With the 12nd RE, or DM-RS RE corresponding to each DM-RS antenna port are according to subcarrier in each PRB pair The order of numbering from low to high the 1st, the 6th and the 11st RE corresponding in described two OFDM symbols；Or work as A=4 And when DM-RS is mapped into one or two OFDM symbol：DM-RS RE corresponding to each DM-RS antenna port are described every In individual PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to b Individual, b+a, b+2a and the b+3a RE, wherein, a=1, b are 1 to 9 any integer including 1 and 9, or a= 2, b be 1 to 6 any integer including 1 and 6, or a=3, b=1 or 2 or 3 or 4；Or each DM-RS antenna port pair The DM-RS RE answered are one or two in each PRB pair according to subcarrier number order from low to high B-th corresponding in individual OFDM symbol, b+1, b+a and the b+1+a RE, wherein, a be 3 to 10 including 3 and 10 Interior any integer, for 1 to (11-a) any integer including 1 and (11-a)；Or mapped as A=6 and by DM-RS During to one or two OFDM symbol：DM-RS RE corresponding to each DM-RS antenna port are in each PRB pair According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 2nd, the 3rd, the 6th Individual, the 7th, the 10th and the 11st RE；

Wherein A is the integer more than 1 and less than 12；

Terminal DM-RS according to corresponding to each DM-RS antenna port, the downlink data received on respective antenna port is carried out Demodulation.

13. method as claimed in claim 12, it is characterised in that for conventional cyclic prefix CP, the maximum occurrences of the N are 6；For extending CP, the maximum occurrences of the N are 5；Or

Maximum occurrences for conventional CP and extension CP, the N are 3.

14. method as claimed in claim 12, it is characterised in that in TDD system, the subframe is conventional CP The special subframe of lower corresponding special subframe configuration 9, or to correspond to the special subframe of special subframe configuration 7 under extension CP；Or

The subframe is the descending sub frame in FDD system；Or

15. method as claimed in claim 12, it is characterised in that if the subframe is synchronous transmission of signal subframe, further Including：

Terminal receives synchronizing signal in the 3rd OFDM symbol in the subframe.

16. method as claimed in claim 12, it is characterised in that DM-RS RE corresponding to each DM-RS antenna port To be different from the RE in two OFDM symbols of synchronous transmission of signal place OFDM symbol in the top n OFDM symbol in the subframe When, described two OFDM symbols are continuous or discrete OFDM symbol；Or

17. method as claimed in claim 16, it is characterised in that described two OFDM symbols are the 1st in the subframe OFDM symbol and the 2nd OFDM symbol, or be the 4th OFDM symbol and the 5th OFDM symbol in the subframe, or be described The 5th OFDM symbol and the 6th OFDM symbol in subframe, or be the 2nd OFDM symbol and the 4th OFDM in the subframe Symbol, or be the 4th OFDM symbol and the 6th OFDM symbol in the subframe, or be the 1st, 2,4,5,6 in the subframe The discontinuous OFDM symbol of any two in individual OFDM symbol；

18. method as claimed in claim 12, it is characterised in that DM-RS RE corresponding to each DM-RS antenna port, It is the A volume that each PRB pair are included during the PRB pair for being used to transmit corresponding to DM-RS physical resource gather Number different subcarriers corresponding RE in one or two OFDM symbols.

19. method as claimed in claim 12, it is characterised in that 8 DM-RS antenna ports are divided into 2 groups, each packet Comprising 4 DM-RS antenna ports, 4 DM-RS antenna ports in same packet correspond to identical DM-RS RE；For every Individual packet, the different subcarrier of A numbering is determined in each PRB pair, the subcarrier determined for different grouping is different；Will The A subcarrier determined in each PRB pair corresponding RE in one or two OFDM symbols is grouped as corresponding In DM-RS antenna port in each PRB pair corresponding DM-RS RE, specifically include：

20. the method as described in any in claim 12 or 18~19, it is characterised in that the terminal is according to each DM-RS The DM-RS resource mapping methods of antenna port, respectively each DM-RS antenna port in present sub-frame it is described be used for transmit DM-RS corresponding to obtaining the DM-RS antenna port on corresponding DM-RS RE on DM-RS physical resource, is specifically included：

When A is not 4 integral multiple and DM-RS is mapped in two OFDM symbols：

When A is 4 integral multiple：

21. method as claimed in claim 12, it is characterised in that 8 DM-RS antenna ports are divided into 4 groups, each packet Comprising 2 DM-RS antenna ports, 2 DM-RS days lower ports in same packet correspond to identical DM-RS RE；For every Individual packet, the different subcarrier of A numbering is determined in each PRB pair, the subcarrier determined for different grouping is different；Will The A subcarrier determined in each PRB pair corresponding RE in one or two OFDM symbols is grouped as corresponding In DM-RS antenna port during corresponding DM-RS RE, specifically included in each PRB pair：

As A=3 and when DM-RS is mapped into two OFDM symbols：

22. the method as described in claim 12 or 21, it is characterised in that the terminal is according to each DM-RS antenna port DM-RS resource mapping methods, each DM-RS antenna port in present sub-frame is in the thing for being used to transmit DM-RS respectively DM-RS corresponding to obtaining the DM-RS antenna port on corresponding DM-RS RE in reason resource, is specifically included：

When DM-RS is mapped into two OFDM symbols：

When A is 2 integral multiple：

23. a kind of base station, it is characterised in that the base station includes：

DM-RS map units, for the DM-RS resource mapping methods according to each DM-RS antenna port, respectively by present sub-frame In each DM-RS antenna port corresponding to DM-RS be mapped to the DM-RS antenna port and be used to transmit DM-RS thing described Manage in resource on corresponding DM-RS resource units RE, DM-RS RE corresponding to each DM-RS antenna port are in the subframe Top n orthogonal frequency division multiplex OFDM symbol in be different from synchronous transmission of signal where OFDM symbol one or two OFDM symbol RE on number；Wherein N is the integer not less than 1；

Wherein, the DM-RS map units are further used for：When supporting maximum 8 DM-RS antenna ports, according to such as lower section Method determines DM-RS RE corresponding to each DM-RS antenna port：8 DM-RS antenna ports are divided into 2 groups, Mei Gefen Group includes 4 DM-RS antenna ports, and 4 DM-RS antenna ports in same packet correspond to identical DM-RS RE；For Each packet, the different subcarrier of A numbering is determined in each Physical Resource Block is to PRB pair, is determined for different grouping Subcarrier is different；By the A subcarrier determined in each PRB pair in one or two OFDM symbols corresponding to RE corresponding DM-RS RE in each PRB pair as the DM-RS antenna port in corresponding be grouped；Or supporting maximum During 8 DM-RS antenna ports, DM-RS RE corresponding to each DM-RS antenna port are determined as follows：By 8 DM-RS antenna port is divided into 4 groups, and each packet includes 2 DM-RS antenna ports, 2 in same packet DM-RS days Line end mouth corresponds to identical DM-RS RE；For each packet, the different son load of A numbering is determined in each PRB pair Ripple, the subcarrier determined for different grouping are different；By the A subcarrier determined in each PRB pair one or two In individual OFDM symbol corresponding RE as the DM-RS antenna port in corresponding be grouped the corresponding DM-RS in each PRB pair RE；

Or the DM-RS map units are further used for：When supporting maximum 4 DM-RS antenna ports, by 4 DM-RS Antenna port is divided into 2 groups, and each packet includes 2 DM-RS antenna ports, 2 DM-RS antenna ports in same packet Corresponding identical DM-RS RE, and DM-RS RE corresponding to each DM-RS antenna port are determined as follows：As A=3 and When DM-RS is mapped into two OFDM symbols：Determine that DM-RS RE corresponding to the DM-RS antenna port in a packet are in institute State in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 2nd, 7th and the 12nd RE, determine that DM-RS RE corresponding to the DM-RS antenna port in another packet are in each PRB In pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 1st, the 6th and the 11st Individual RE；Or as A=4 and when DM-RS is mapped into an OFDM symbol：Determine the DM-RS antenna port pair in a packet The DM-RS RE answered are in described two OFDM in each PRB pair according to subcarrier number order from low to high 3rd, the 4th, the 11st and the 12nd RE corresponding on symbol, determine that the DM-RS antenna port in another packet is corresponding DM-RS RE be to be accorded with each PRB pair according to the order of subcarrier number from low to high in described two OFDM 1st, the 2nd, the 9th and the 10th RE corresponding on number；Or it is mapped to one or two as A=6 and by DM-RS During OFDM symbol：It is in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in a packet According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 3rd, the 4th, the 7th Individual, the 8th, the 11st and the 12nd RE；Determine that DM-RS RE corresponding to the DM-RS antenna port in another packet are in institute State in each PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE；

Or the DM-RS map units are further used for：When supporting maximum 2 DM-RS antenna ports, it is determined that each DM- DM-RS RE are identical corresponding to RS antenna ports, and determine DM-RS corresponding to each DM-RS antenna port as follows RE：As A=2 and when DM-RS is mapped into one or two OFDM symbol：It is determined that DM-RS corresponding to each DM-RS antenna port RE is in one or two OFDM symbols in each PRB pair according to subcarrier number order from low to high B-th and the b+a RE corresponding to upper, wherein, a is 1 to 11 to include any integer including 1 and 11, and b arrives (12-a) for 1 Include any integer including 1 and (12-a)；Or as A=3 and when DM-RS is mapped into two OFDM symbols：It is it is determined that every DM-RS RE corresponding to individual DM-RS antenna port are according to subcarrier number from low to high suitable in each PRB pair Sequence the 2nd, the 7th and the 12nd RE corresponding in described two OFDM symbols, or determine that each DM-RS antenna port is corresponding DM-RS RE be to be accorded with each PRB pair according to the order of subcarrier number from low to high in described two OFDM 1st, the 6th and the 11st RE corresponding on number；Or it is mapped to one or two OFDM symbol as A=4 and by DM-RS When：It is determined that DM-RS RE corresponding to each DM-RS antenna port be in each PRB pair according to subcarrier number from Low to high order is b-th corresponding in one or two OFDM symbols, b+a, b+2a and b+3a RE, wherein, a=1, b are 1 to 9 any integer including 1 and 9, or a=2, b are 1 to 6 any whole including 1 and 6 Number, or a=3, b=1 or 2 or 3 or 4；Or it is determined that DM-RS RE corresponding to each DM-RS antenna port are described each In PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to b-th, B+1, b+a and the b+1+a RE, wherein, a is 3 to 10 any integer including 3 and 10, and (11-a) is arrived for 1 Any integer including 1 and (11-a)；Or as A=6 and when DM-RS is mapped into one or two OFDM symbol：Really DM-RS RE corresponding to fixed each DM-RS antenna port be in each PRB pair according to subcarrier number from low to high Order in one or two OFDM symbols corresponding to the 2nd, the 3rd, the 6th, the 7th, the 10th and the 11st RE；

Wherein A is the integer more than 1 and less than 12；

Transmission unit, for the physical resource for being used to transmit DM-RS in the burst, by being used to transmit DM- in the subframe RS antenna port to terminal send resource impact after DM-RS.

24. base station as claimed in claim 23, it is characterised in that the DM-RS map units are specifically used for：Followed for conventional Ring prefix CP, the maximum occurrences for determining the N are 6；For extending CP, the maximum occurrences for determining the N are 5；Or

25. base station as claimed in claim 23, it is characterised in that the DM-RS map units are specifically used for：In time division duplex In TDD system, it is that the special subframe of special subframe configuration 9 is corresponded under conventional CP to determine the subframe, or to be corresponded under extension CP The special subframe of special subframe configuration 7；Or

Determine the subframe for the descending sub frame in FDD system；Or

In a tdd system, it is that corresponding other special subframes in addition to special subframe configuration 9 are matched somebody with somebody under conventional CP to determine the subframe The special subframe put, or the special subframe for corresponding other special subframes configuration in addition to special subframe configuration 7 under extension CP； Or

In a tdd system, it is that the special subframe of any special subframe configuration is corresponded under conventional CP to determine the subframe, or is extension The special subframe of any special subframe configuration is corresponded under CP.

26. base station as claimed in claim 23, it is characterised in that the transmission unit is additionally operable to：

When the subframe is synchronous transmission of signal subframe, synchronous signal transmission in the 3rd OFDM symbol in the burst.

27. base station as claimed in claim 23, it is characterised in that the DM-RS map units are specifically used for：When described each DM-RS RE corresponding to DM-RS antenna port are to be different from the top n OFDM symbol in the subframe where synchronous transmission of signal During RE in two OFDM symbols of OFDM symbol, determine described two OFDM symbols for continuous or discrete OFDM symbols Number；Or

When DM-RS RE corresponding to each DM-RS antenna port are to be different from together in the top n OFDM symbol in the subframe When walking the RE in an OFDM symbol of signal transmission place OFDM symbol, it is the top n to determine one OFDM symbol Any one OFDM symbol in OFDM symbol in addition to OFDM symbol where synchronous transmission of signal.

28. base station as claimed in claim 27, it is characterised in that the DM-RS map units are further used for：It is it is determined that described Two OFDM symbols are the 1st OFDM symbol and the 2nd OFDM symbol in the subframe, or are the 4th in the subframe OFDM symbol and the 5th OFDM symbol, or be the 5th OFDM symbol and the 6th OFDM symbol in the subframe, or be described The 2nd OFDM symbol and the 4th OFDM symbol in subframe, or be the 4th OFDM symbol and the 6th OFDM in the subframe Symbol, or be the discontinuous OFDM symbol of any two in the 1st, 2,4,5,6 OFDM symbol in the subframe；

Determine one OFDM symbol for the 1st OFDM symbol in the subframe, the 2nd OFDM symbol, the 4th OFDM symbol Number, any one in the 5th OFDM symbol, the 6th OFDM symbol.

29. base station as claimed in claim 23, it is characterised in that the DM-RS map units are specifically used for：Determine described every DM-RS RE corresponding to individual DM-RS antenna port, it is the PRB pair collection for transmitting corresponding to DM-RS physical resource In conjunction, the different subcarrier of included A numbering of each PRB pair is corresponding in one or two OFDM symbols RE。

30. base station as claimed in claim 23, it is characterised in that when the DM-RS map units are by 8 DM-RS antenna ends When mouth is divided into 2 groups, the DM-RS map units are further used for：

As A=6 and when DM-RS is mapped into two OFDM symbols, determine corresponding to the DM-RS antenna port in a packet DM-RS RE are in described two OFDM symbols in each PRB pair according to subcarrier number order from low to high 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE corresponding to upper；Determine the DM-RS antennas in another packet DM-RS RE corresponding to port are described two in each PRB pair according to subcarrier number order from low to high 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE corresponding in individual OFDM symbol；Or

As A=4 and when DM-RS is mapped into one or two OFDM symbol, as follows 1 to a side in method 5 Method determine two packet in DM-RS antenna port corresponding to DM-RS RE：

Method 1：Determine DM-RS RE corresponding to the DM-RS antenna port in a packet be in each PRB pair according to The order of subcarrier number from low to high 12-b-a, 12-b+1-a corresponding in one or two OFDM symbols Individual, 12-b and the 12-b+1 RE；Determine that DM-RS RE corresponding to the DM-RS antenna port in another packet are institutes State in each PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to B-thth, b+1, b+a and the b+1+a RE；Wherein, as b=1, a=8 or 7 or 6 or 4 or 3 or 2, b=2 is worked as When, a=6 or 5 or 3 or 2, as b=3, a=4 or 2；

Method 2：Determine DM-RS RE corresponding to the DM-RS antenna port in a packet be in each PRB pair according to The order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 5th, the 6th, the 11st and 12nd RE；Determine DM-RS RE corresponding to the DM-RS antenna port in another packet be in each PRB pair by According to subcarrier number from low to high in one or two OFDM symbols corresponding to the 3rd, the 4th, the 9th and the 10th Individual RE, or, it is one or two in each PRB pair according to subcarrier number order from low to high 2nd, the 3rd, the 8th and the 9th RE corresponding in OFDM symbol；

Method 3：With in each PRB pair according to subcarrier number order from low to high one or two 1st, the 4th, the 7th and the 10th RE corresponding in OFDM symbol is one group of DM-RS RE, the 3rd, the 6th, the 9th and 12nd RE is one group of DM-RS RE, and the 2nd, the 5th, the 8th and the 11st RE is one group of DM-RS RE, determines a packet In DM-RS antenna port corresponding to DM-RS RE be 3 groups of DM-RS RE in one group；Determine in another packet DM-RS RE corresponding to DM-RS antenna port are another group in 3 groups of DM-RS RE；

Method 4：Determine DM-RS RE corresponding to the DM-RS antenna port in a packet be in each PRB pair according to The order of subcarrier number from low to high 12-b-c+1-a, 12-b corresponding in one or two OFDM symbols + 1-a, 12-b-c+1 and the 12-b+1 RE；Determine DM-RS corresponding to the DM-RS antenna port in another packet RE be in each PRB pair according to subcarrier number order from low to high in one or two OFDM symbols Corresponding b-th, b+c, b+a and the b+c+a RE；Wherein, b=1, c=3, a=6, or, b=1, c=2, a =4, or b=2, c=2, a=4；

Method 5：Determine DM-RS RE corresponding to the DM-RS antenna port in a packet be in each PRB pair according to The order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 2nd, the 5th, the 8th and 11st RE；Determine DM-RS RE corresponding to the DM-RS antenna port in another packet be in each PRB pair by According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 1st, the 4th, the 7th, With in the 10th RE, or each PRB pair according to subcarrier number order from low to high one or two 3rd, the 6th, the 9th and the 12nd RE corresponding in OFDM symbol；Or

As A=2 and when DM-RS is mapped into two OFDM symbols, determine corresponding to the DM-RS antenna port in a packet DM-RS RE be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols Corresponding 12-b+1-a and the 12-b+1 RE；Determine DM-RS corresponding to the DM-RS antenna port in another packet RE be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to B-th and the b+a RE, wherein, as b=1, a is 1 to 10 to include any integer including 1 and 10, and as b=2, a is 1 to 10 includes any integer in addition to 9 including 1 and 10, and as b=3, a includes removing including 1 and 9 for 1 to 9 Any integer beyond 7, as b=4, a is 1 to 8 to include any integer in addition to 5 including 1 and 8, works as b=5 When, a includes any integer in addition to 3 including 1 and 7 for 1 to 7.

31. the base station as described in any in claim 23 or 29~30, it is characterised in that the base station also includes：

First spectrum-spreading unit, for the physical resource for being used to transmit DM-RS in the burst, by being used to transmit in the subframe DM-RS antenna port send the resource impact to terminal after DM-RS before：

When A is not 4 integral multiple and DM-RS is mapped in two OFDM symbols：For each DM-RS antenna port, by the DM- 4 DM-RS on RS antenna ports on two subcarriers adjacent or closest in described two OFDM symbols are as one Group, and spread processing is carried out to every group of DM-RS respectively using the orthogonal sequence that length corresponding to the antenna port is 4；Or

When A is 4 integral multiple：For each DM-RS antenna port, DM- will be mapped with each in the DM-RS antenna port 4 DM-RS in RS OFDM symbol on 4 adjacent or closest subcarriers use the antenna port as one group The orthogonal sequence that corresponding length is 4 carries out spread processing to every group of DM-RS respectively.

32. base station as claimed in claim 23, it is characterised in that when the DM-RS map units are by 8 DM-RS antenna ends When mouth is divided into 4 groups, the DM-RS map units are further used for：

As A=3 and when DM-RS is mapped into two OFDM symbols, determine that the DM-RS antenna port in first packet is corresponding DM-RS RE be to be accorded with each PRB pair according to the order of subcarrier number from low to high in described two OFDM 4th, the 8th and the 12nd RE corresponding on number；Determine DM-RS RE corresponding to the DM-RS antenna port in second packet Be in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to 1st, the 5th and the 9th RE；It is described every to determine DM-RS RE corresponding to the DM-RS antenna port in the 3rd packet In individual PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 3rd, the 7th With the 11st RE；It is in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in the 4th packet According to subcarrier number order from low to high in described two OFDM symbols corresponding to the 2nd, the 6th and the 10th RE；Or

As A=2 and when DM-RS is mapped into one or two OFDM symbol, as follows 1 to a side in method 3 Method determine four packet in DM-RS antenna port corresponding to DM-RS RE：

Method 1：By in each PRB pair according to subcarrier number order from low to high one or two Corresponding in OFDM symbol b-th and the b+a RE as one group, obtain (12-a) group RE, wherein, a includes 2 Hes for 2 to 8 Any integer including 8, b include 1 and any integer including (12-a) for 1 to (12-a)；Determine first, second, third and fourth One group of RE in respectively described (12-a) the group RE of DM-RS RE corresponding to DM-RS antenna port in packet, each packet pair The RE groups answered are different；

Method 2：It is in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in first packet According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to b-th and the b+1 RE； It is according to subcarrier in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in second packet The order of numbering from low to high is 12-b and the 12-b+1 RE corresponding in one or two OFDM symbols；It is determined that DM-RS RE corresponding to DM-RS antenna port in 3rd packet are according to subcarrier number in each PRB pair Order from low to high is b+a and the b+1+a RE corresponding in one or two OFDM symbols；Determine the 4th DM-RS RE corresponding to DM-RS antenna port in packet be in each PRB pair according to subcarrier number from it is low to High order is 12-b-a and the 12-b+1-a RE corresponding in one or two OFDM symbols；Wherein, b=1, A=2 or 3 or 4, or, b=2, a=2 or 3, or b=3, a=2；

Method 3：It is in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in first packet According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to b-th and the b+1 RE； It is according to subcarrier in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in second packet The order of numbering from low to high is b+a and the b+a+1 RE corresponding in one or two OFDM symbols；Determine DM-RS RE corresponding to DM-RS antenna port in three packets be in each PRB pair according to subcarrier number from Low to high order is b+2a and the b+2a+1 RE corresponding in one or two OFDM symbols；Determine the 4th DM-RS RE corresponding to DM-RS antenna port in packet be in each PRB pair according to subcarrier number from it is low to High order is b+3a and the b+3a+1 RE corresponding in one or two OFDM symbols；Wherein, a=2, b 1 Include any integer including 1 and 5, or, a=3, b=1 or 2 to 5.

33. the base station as described in claim 23 or 32, it is characterised in that the base station also includes：

Second spectrum-spreading unit, for the physical resource for being used to transmit DM-RS in the burst, by being used to transmit in the subframe DM-RS antenna port send the resource impact to terminal after DM-RS before：

When DM-RS is mapped into two OFDM symbols：For each DM-RS antenna port, by the antenna port described 2 DM-RS of same subcarrier are corresponded in two OFDM symbols as one group, and the use of length corresponding to the antenna port are 2 Orthogonal sequence spread processing is carried out to every group of DM-RS；Or

When A is 2 integral multiple：For each DM-RS antenna port, it will be mapped with DM-RS's described on the antenna port 2 DM-RS in OFDM symbol are as one group, and using the orthogonal sequence that length corresponding to the antenna port is 2 to this group of DM- RS carries out spread processing.

34. a kind of terminal, it is characterised in that the terminal includes：

DM-RS acquiring units, for the DM-RS resource mapping methods according to each DM-RS antenna port, respectively in present sub-frame In each DM-RS antenna port it is described for transmit DM-RS physical resource on corresponding DM-RS resource units RE on obtain DM-RS corresponding to the DM-RS antenna port is taken, DM-RS RE corresponding to each DM-RS antenna port are in the subframe One or two OFDM symbol of OFDM symbol where being different from synchronous transmission of signal in top n orthogonal frequency division multiplex OFDM symbol On RE；Wherein N is the integer not less than 1 and no more than 6；

Wherein, the DM-RS acquiring units are further used for：When supporting maximum 8 DM-RS antenna ports, according to such as lower section Method determines DM-RS RE corresponding to each DM-RS antenna port：8 DM-RS antenna ports are divided into 2 groups, Mei Gefen Group includes 4 DM-RS antenna ports, and 4 DM-RS antenna ports in same packet correspond to identical DM-RS RE；For Each packet, the different subcarrier of A numbering is determined in each Physical Resource Block is to PRB pair, is determined for different grouping Subcarrier is different；By the A subcarrier determined in each PRB pair in one or two OFDM symbols corresponding to RE corresponding DM-RS RE in each PRB pair as the DM-RS antenna port in corresponding be grouped；Or by 8 DM-RS Antenna port is divided into 4 groups, and each packet includes 2 DM-RS antenna ports, 2 DM-RS antenna ports in same packet Corresponding identical DM-RS RE；For each packet, the different subcarrier of A numbering is determined in each PRB pair, for not The subcarrier determined with packet is different；By the A subcarrier determined in each PRB pair in one or two OFDM On symbol corresponding RE as the DM-RS antenna port in corresponding be grouped the corresponding DM-RS RE in each PRB pair；

Or the DM-RS acquiring units are further used for：When supporting maximum 4 DM-RS antenna ports, by 4 DM-RS Antenna port is divided into 2 groups, and each packet includes 2 DM-RS antenna ports, 2 DM-RS antenna ports in same packet Corresponding identical DM-RS RE, and DM-RS RE corresponding to each DM-RS antenna port are determined as follows：As A=3 and When DM-RS is mapped into two OFDM symbols：Determine that DM-RS RE corresponding to the DM-RS antenna port in a packet are in institute State in each PRB pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 2nd, 7th and the 12nd RE, determine that DM-RS RE corresponding to the DM-RS antenna port in another packet are in each PRB In pair according to subcarrier number order from low to high in described two OFDM symbols corresponding to the 1st, the 6th and the 11st Individual RE；Or as A=4 and when DM-RS is mapped into an OFDM symbol：Determine the DM-RS antenna port pair in a packet The DM-RS RE answered are in described two OFDM in each PRB pair according to subcarrier number order from low to high 3rd, the 4th, the 11st and the 12nd RE corresponding on symbol, determine that the DM-RS antenna port in another packet is corresponding DM-RS RE be to be accorded with each PRB pair according to the order of subcarrier number from low to high in described two OFDM 1st, the 2nd, the 9th and the 10th RE corresponding on number；Or it is mapped to one or two as A=6 and by DM-RS During OFDM symbol：It is in each PRB pair to determine DM-RS RE corresponding to the DM-RS antenna port in a packet According to the order of subcarrier number from low to high in one or two OFDM symbols corresponding to the 3rd, the 4th, the 7th Individual, the 8th, the 11st and the 12nd RE；Determine that DM-RS RE corresponding to the DM-RS antenna port in another packet are in institute State in each PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE；

Or the DM-RS acquiring units are further used for：When supporting maximum 2 DM-RS antenna ports, it is determined that each DM- DM-RS RE are identical corresponding to RS antenna ports, and determine DM-RS corresponding to each DM-RS antenna port as follows RE：As A=2 and when DM-RS is mapped into one or two OFDM symbol：It is determined that DM-RS corresponding to each DM-RS antenna port RE is in one or two OFDM symbols in each PRB pair according to subcarrier number order from low to high B-th and the b+a RE corresponding to upper, wherein, a is 1 to 11 to include any integer including 1 and 11, and b arrives (12-a) for 1 Include any integer including 1 and (12-a)；Or as A=3 and when DM-RS is mapped into two OFDM symbols：It is it is determined that every DM-RS RE corresponding to individual DM-RS antenna port are according to subcarrier number from low to high suitable in each PRB pair Sequence the 2nd, the 7th and the 12nd RE corresponding in described two OFDM symbols, or determine that each DM-RS antenna port is corresponding DM-RS RE be to be accorded with each PRB pair according to the order of subcarrier number from low to high in described two OFDM 1st, the 6th and the 11st RE corresponding on number；Or it is mapped to one or two OFDM symbol as A=4 and by DM-RS When：It is determined that DM-RS RE corresponding to each DM-RS antenna port be in each PRB pair according to subcarrier number from Low to high order is b-th corresponding in one or two OFDM symbols, b+a, b+2a and b+3a RE, wherein, a=1, b are 1 to 9 any integer including 1 and 9, or a=2, b are 1 to 6 any whole including 1 and 6 Number, or a=3, b=1 or 2 or 3 or 4；Or it is determined that DM-RS RE corresponding to each DM-RS antenna port are described each In PRB pair according to subcarrier number order from low to high in one or two OFDM symbols corresponding to b-th, B+1, b+a and the b+1+a RE, wherein, a is 3 to 10 any integer including 3 and 10, and (11-a) is arrived for 1 Any integer including 1 and (11-a)；Or as A=6 and when DM-RS is mapped into one or two OFDM symbol：Really DM-RS RE corresponding to fixed each DM-RS antenna port be in each PRB pair according to subcarrier number from low to high Order in one or two OFDM symbols corresponding to the 2nd, the 3rd, the 6th, the 7th, the 10th and the 11st RE；

Wherein A is the integer more than 1 and less than 12；

Demodulating unit, for the DM-RS according to corresponding to each DM-RS antenna port, to being received down on respective antenna port Row data are demodulated.

35. terminal as claimed in claim 34, it is characterised in that the DM-RS acquiring units are specifically used for：Followed for conventional Ring prefix CP, the maximum occurrences for determining the N are 6；For extending CP, the maximum occurrences for determining the N are 5；Or

36. terminal as claimed in claim 34, it is characterised in that the DM-RS acquiring units are specifically used for：In time division duplex In TDD system, it is that the special subframe of special subframe configuration 9 is corresponded under conventional CP to determine the subframe, or to be corresponded under extension CP The special subframe of special subframe configuration 7；Or

Determine the subframe for the descending sub frame in FDD system；Or

37. terminal as claimed in claim 34, it is characterised in that the DM-RS acquiring units are additionally operable to：

When the subframe is synchronous transmission of signal subframe, synchronizing signal is received in the 3rd OFDM symbol in the subframe.

38. terminal as claimed in claim 34, it is characterised in that in DM-RS corresponding to each DM-RS antenna port RE is in two OFDM symbols of OFDM symbol where being different from synchronous transmission of signal in the top n OFDM symbol in the subframe During RE, the DM-RS acquiring units are specifically used for：Determine described two OFDM symbols for continuous or discrete OFDM symbols Number；Or

It is different from the top n OFDM symbol during DM-RS RE corresponding to each DM-RS antenna port are the subframe same When walking the RE in an OFDM symbol of signal transmission place OFDM symbol, the DM-RS acquiring units are specifically used for：Determine institute An OFDM symbol is stated as any one in the top n OFDM symbol in addition to OFDM symbol where synchronous transmission of signal OFDM symbol.

39. terminal as claimed in claim 38, it is characterised in that the DM-RS acquiring units are further used for：It is it is determined that described Two OFDM symbols are the 1st OFDM symbol and the 2nd OFDM symbol in the subframe, or are the 4th in the subframe OFDM symbol and the 5th OFDM symbol, or be the 5th OFDM symbol and the 6th OFDM symbol in the subframe, or be described The 2nd OFDM symbol and the 4th OFDM symbol in subframe, or be the 4th OFDM symbol and the 6th OFDM in the subframe Symbol, or be the discontinuous OFDM symbol of any two in the 1st, 2,4,5,6 OFDM symbol in the subframe；

40. terminal as claimed in claim 34, it is characterised in that the DM-RS acquiring units are specifically used for：Determine described every DM-RS RE corresponding to individual DM-RS antenna port, it is the PRB pair collection for transmitting corresponding to DM-RS physical resource In conjunction, the different subcarrier of included A numbering of each PRB pair is corresponding in one or two OFDM symbols RE。

41. terminal as claimed in claim 34, it is characterised in that when the DM-RS acquiring units are by 8 DM-RS antenna ends When mouth is divided into 2 groups, the DM-RS acquiring units are further used for：

42. the terminal as described in any in claim 34 or 40-41, it is characterised in that the DM-RS acquiring units are used for：

43. terminal as claimed in claim 34, it is characterised in that when the DM-RS acquiring units are by 8 DM-RS antenna ends When mouth is divided into 4 groups, the DM-RS acquiring units are further used for：

44. the terminal as described in claim 34 or 43, it is characterised in that the DM-RS acquiring units are used for：