CN105812305B - The generation processing method of pilot frequency in wireless communication system sequence - Google Patents
The generation processing method of pilot frequency in wireless communication system sequence Download PDFInfo
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Abstract
This application discloses a kind of generation processing methods of pilot frequency in wireless communication system sequence, comprising: according to cell ID and n-thPRBThe absolute frequency point call number of a frequency point is described n-thPRBPilot frequency locations in synchronization frame on a frequency point generate pilot frequency sequence；Pilot frequency sequence generated is mapped to described n-thPRBThe corresponding pilot frequency locations of synchronization frame on a frequency point.Using the present invention, the pilot configuration of the Resource Allocation Formula of down-going synchronous frame can be correctly matched.
Description
Technical field
This application involves at wireless communication technology field more particularly to a kind of generation of pilot frequency in wireless communication system sequence
Reason method.
Background technique
In a wireless communication system, orthogonal frequency division multiplexing (OFDM) is a kind of particular frequencies multiplexing using multi-carrier modulation
Technology.In traditional Frequency Division Multiplexing system (FDM): entire signal frequency range is divided into N number of frequency subchannels not overlapped each other, often
Sub-channels transmit independent modulation symbol, and N number of subchannel is then carried out channeling again, and this method is conducive to eliminate channel
Between interfere, but frequency spectrum resource cannot be efficiently used.OFDM technology can use the orthogonality between subcarrier without this
Section guard band.To save bandwidth, thus the OFDM ratio FDM availability of frequency spectrum is higher.The basic principle of OFDM is exactly height
Fast data flow is assigned in the relatively low several sub-channels of transmission rate and is transmitted by serial to parallel conversion.It is each in this way
Symbol period in sub-channels can be elongated, therefore can mitigate multidiameter delay influence caused by system.OFDM is using easy
The Fourier transform modulation orthogonal based on carrier frequency realized, directly in Base-Band Processing.
Fig. 1 is a kind of existing wireless communication system spectrum diagram.Referring to Fig. 1, wireless communication system occupancy does not connect
Continuous spectral bandwidth, each frequency domain are that the physical channel of 25kHz bandwidth is defined as a frequency point, at most
A frequency point.Each frequency point uses OFDM technology, and all discontinuous frequency points condense together, and system does United Dispatching and distributes to user
Terminal constitutes the communication system with carrier wave polymerization property.The wireless communication system corresponding nothing on each frequency point
Line frame length is 25ms, includes 45 OFDM symbols.
Fig. 2 is the frequency point time interval resource structural schematic diagram of the wireless communication system, as shown in Fig. 2, the downlink resource
Occupy 13 OFDM symbols.
Fig. 3 is the wireless communication system descending pilot frequency scheme schematic diagram, as shown in figure 3, wherein each of each frequency point
There is a RE as pilot tone in OFDM symbol, the position (k, l) of the pilot tone is according to cell IDWith OFDM symbol number l
To determine.
Wherein
For each pilot frequency locations in Fig. 3, it is as follows that pilot frequency sequence generates formula:
For a kind of descending pilot frequency scheme of the wireless communication system with carrier wave polymerization property shown in Fig. 3, Mei Gepin
The downlink reference signal that point, each radio frames generate are as follows:
Wherein, nPRBFor frequency point index value, value rangeC (n) is pseudorandom sequence
Column, the generating mode of c (n) are as follows:
C (n)=(x1(n+NC)+x2(n+NC))mod2
x1(n+31)=(x1(n+3)+x1(n))mod2
x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2
Wherein NC=1600, first m-sequence initialization of register is x1(0)=1, x1..., (n)=0, n=1,2 30.
Second m-sequence initialization of register becinitInitial value are as follows:
WhereinRepresent the OFDM symbol index in a radio frames.
Reference signal sequence rl(nPRB), it will be mapped to complex value modulation symbol as followsOn, as one
Downlink reference signal in radio frames:
But current pilot sequence generating method is not suitable for the pilot tone knot in the Resource Allocation Formula of down-going synchronous frame
Structure.Such as Fig. 4 is a kind of schematic diagram of the specific Resource Allocation Formula of down-going synchronous frame.Referring to fig. 4,10 × 13 square shown in
One resource block of matrix representation, wherein 10 rows indicate that bandwidth is 10 subcarriers of nominated bandwidth, each column is exactly an OFDM symbol,
One shares 13 column, this 13 OFDM symbols indicate the downlink resource of the down-going synchronous frame, specifically down time-frequency resource.
Preceding 6 ODFM symbols are occupied in the down-going synchronous frame as downlink heartbeat resource, such as the shaded block institute in Fig. 3
Show；After occupying simultaneously 7 ODFM symbols send the resource of downlink synchronous signal, such as the sky in Fig. 3 as down-going synchronous resource
Shown in white piece.In the downlink heartbeat resource；The pilot signal of downlink heartbeat signal occupies in 6 ODFM symbols
One OFDM symbol and the last one (i.e. the 6th) OFDM symbol are sent.Downlink heartbeat signal occupies described first
OFDM symbol between OFDM symbol and the last one OFDM symbol is sent, that is, occupies the described 2nd, 3,4,5 OFDM symbol
Number.
For the pilot configuration of the specific Resource Allocation Formula of down-going synchronous frame shown in Fig. 4, existing pilot frequency sequence is raw
Correct pilot frequency sequence can not be generated at method, can not correctly match leading for the specific Resource Allocation Formula of the down-going synchronous frame
Frequency structure.
Summary of the invention
In view of this, the main object of the present invention is to provide a kind of pilot sequence generating method of wireless communication system, it can
Correctly to match the pilot configuration of the Resource Allocation Formula of down-going synchronous frame.
The technical scheme of the present invention is realized as follows:
A kind of generation processing method of pilot frequency in wireless communication system sequence, comprising:
According to cell ID and n-thPRBThe absolute frequency point call number of a frequency point is described n-thPRBSynchronization frame on a frequency point
In pilot frequency locations generate pilot frequency sequence；
Pilot frequency sequence generated is mapped to described n-thPRBThe corresponding pilot frequency locations of synchronization frame on a frequency point.
In an advantageous embodiment, described according to cell ID and n-thPRBThe absolute frequency point call number of a frequency point, for institute
State n-thPRBPilot frequency locations in synchronization frame on a frequency point generate pilot frequency sequence, specifically include:
(1) generates the pilot frequency sequence according to the following formula:
Formula (1)
Wherein, k value range 0,1 ..., m-1, m are the sub-carrier number of the resource block of the synchronization frame, and the c is length
For MPNRandom sequence c (n), the MPN=m；
Wherein, random sequence c (n), n=0,1 ..., MPN- 1 (2) generation according to the following formula:
C (n)=(x1(n+NC)+x2(n+NC)) mod2 formula (2)
In formula (2), the x1For first m-sequence register, x1(3) generate according to the following formula；The x2It is second
A m-sequence register, x2(4) generate according to the following formula:
x1(n+31)=(x1(n+3)+x1(n)) mod2 formula (3)
x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n)) mod2 formula (4)
The wherein NC=1600,
First m-sequence initialization of register is x1(0)=1, x1(n)=0, n=1,2 ..., 30,
Second m-sequence initialization of register be
cinitInitial value are as follows:
Wherein, the SubBandIndex indicates described n-thPRBThe absolute frequency point call number of a frequency point,Indicate cell
Mark.
In an advantageous embodiment, described that pilot frequency sequence generated is mapped to described n-thPRBIt is same on a frequency point
The corresponding pilot frequency locations of step-frame, specifically include:
The formula (1) is obtained into the pilot frequency sequence of m point length, is respectively mapped to described according to identical mapping mode
nPRBOn m subcarrier of the corresponding pilot frequency locations of synchronization frame on a frequency point, the specific following formula of mapping mode (5):
Formula (5)
Wherein l indicates the serial number of the orthogonal frequency division multiplex OFDM symbol where pilot frequency locations.
In an advantageous embodiment, the m=10.
In an advantageous embodiment, the corresponding pilot tone that pilot frequency sequence generated is mapped to the synchronization frame
After position, this method further comprises: being directed to each frequency point, utilizes the pilot tone be mappeding in the synchronization frame pilot frequency locations
Sequence generates the time domain continuous signal that the frequency point emits on single antenna port in the corresponding OFDM symbol of the synchronization frame, and
Emit the time domain continuous signal.
In an advantageous embodiment, the utilization be mapped to the pilot frequency sequence in the synchronization frame pilot frequency locations, raw
At the time domain continuous signal that the frequency point emits on single antenna port in the corresponding OFDM symbol of the synchronization frame, specifically include:
Using following formula (6), determine that the frequency point is sent out on single antenna port in the corresponding OFDM symbol of the synchronization frame
The time domain continuous signal penetrated
Formula (6)
Wherein: nPRBFor the serial number of the frequency point,
L is the serial number of the corresponding OFDM symbol of the synchronization frame,
0≤t<(Ncp,l+N)×Ts,
Ncp,lFor the length of the cyclic prefix CP of first of OFDM symbol,
N=64,For sampling interval, fsFor baseband sampling rate；
For the number of subcarriers of a resource block of the synchronization frame；
△ f=2kHz.
In an advantageous embodiment, the transmitting time domain continuous signal, specifically includes:
N-thPRBThe sequential transmission that the OFDM symbol in synchronization frame on a frequency point is incremented by since l=0 according to l, in subframe
The OFDM symbol of l > 0 is at the momentStart to emit.
It in an advantageous embodiment, include 13 ODFM symbols in the downlink resource in the synchronization frame, wherein occupying
Preceding 6 ODFM symbols are as downlink heartbeat resource, and 7 ODFM symbols are as down-going synchronous resource after occupancy, wherein described first 6
The time that ODFM symbol occupies is identical with the time that rear 7 ODFM symbols occupy.
In an advantageous embodiment, in preceding 6 ODFM symbols, before having 13 dot cycles before each OFDM symbol
Sew；After described in 7 ODFM symbols, there are 15 dot cycle prefixes before first OFDM symbol, before rear 6 ODFM symbols all
There is no cyclic prefix.
In an advantageous embodiment, described to send downlink heartbeat letter to user terminal using the downlink heartbeat resource
Number, it specifically includes:
The pilot signal of downlink heartbeat signal occupies first OFDM symbol and the last one in 6 ODFM symbols
OFDM symbol is sent, and downlink heartbeat signal occupies between first OFDM symbol and the last one OFDM symbol
OFDM symbol is sent.
Compared with prior art, the present invention is according to cell ID and n-thPRBThe absolute frequency point call number of a frequency point, is described
N-thPRBPilot frequency locations in synchronization frame on a frequency point generate pilot frequency sequence；Pilot frequency sequence generated is mapped to described
nPRBThe corresponding pilot frequency locations of synchronization frame on a frequency point, so as to correctly match the resource allocation side of down-going synchronous frame
The pilot configuration of case.It especially can correctly match the money of the down-going synchronous frame of the wireless communication system with carrier wave polymerization property
The pilot configuration of source allocation plan.
Detailed description of the invention
Fig. 1 is a kind of existing wireless communication system spectrum diagram；
Fig. 2 is the frequency point time interval resource structural schematic diagram of the wireless communication system；
Fig. 3 is the wireless communication system descending pilot frequency scheme schematic diagram；
Fig. 4 is a kind of schematic diagram of the specific Resource Allocation Formula of down-going synchronous frame；
Fig. 5 is the process flow diagram of the generation processing method of pilot frequency in wireless communication system sequence of the present invention.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is further described in more detail.
Fig. 5 is the process flow diagram of the generation processing method of pilot frequency in wireless communication system sequence of the present invention.Referring to
Fig. 5, this method comprises:
Step 501, according to cell ID and n-thPRBThe absolute frequency point call number of a frequency point is described n-thPRBOn a frequency point
Synchronization frame in pilot frequency locations generate pilot frequency sequence；
Pilot frequency sequence generated is mapped to described n-th by step 502PRBThe corresponding pilot tone of synchronization frame on a frequency point
Position.
In a preferred embodiment of the present invention, this hair is introduced by taking the Resource Allocation Formula for synchronization frame described in Fig. 4 as an example
The bright pilot frequency sequence generates processing method.In the present embodiment, pilot frequency sequence uses length for the PN code of m.The PN code
It is 0 and 1 coded sequence constituted with the automatic correlative property similar with white noise.The m is the money of the synchronization frame
The sub-carrier number of source block, for example, if being suitable for the resource block of synchronization frame shown in Fig. 4, then m=10.
As shown in figure 4, shown in Fig. 4 10 × 13 matrix indicates a resource block, wherein 10 rows indicate that bandwidth is to refer to
Determine 10 subcarriers of bandwidth, each column is exactly an OFDM symbol, and one shares 13 column, this 13 OFDM symbols indicate the downlink
The downlink resource of synchronization frame, specifically down time-frequency resource.Wherein preceding 6 OFDM symbols (dash area in such as figure) are occupied
Time and rear 7 OFDM symbols occupied time be identical.It is commonly referred to as each of resource block cell
Resource particle (Resource element).In information transmission, these resource particles is needed to modulate (QAM) respectively, be carried out
IFFT transformation is carried out after serial to parallel conversion, then carries out parallel serial conversion, is formed OFDM data stream after cyclic prefix (CP) is added.
The cyclic prefix (CP) of the OFDM is exactly that a part duplication of OFDM symbol tail portion is put into before OFDM, CP's
Effect is to eliminate symbol-interference (ISI) and interchannel interference (ICI).
In the present invention, as shown in figure 4, including 13 ODFM symbols in downlink resource in the down-going synchronous frame, in institute
It states and occupies preceding 6 ODFM symbols in down-going synchronous frame as downlink heartbeat resource, as shown in the shaded block in Fig. 4；It occupies simultaneously
Afterwards 7 ODFM symbols send the resource of downlink synchronous signal, as shown in the blank block in Fig. 4 as down-going synchronous resource.?
In the downlink heartbeat resource；The pilot signal of downlink heartbeat signal occupies the symbol of first OFDM in 6 ODFM symbols
Number and the last one (i.e. the 6th) OFDM symbol sent, in the 1st and the 6th OFDM symbol, before each OFDM symbol
There are 13 dot cycle prefixes (CP) in face.Downlink heartbeat signal occupies between first OFDM symbol and the last one OFDM symbol
OFDM symbol sent, that is, occupy the described 2nd, 3,4,5 OFDM symbol, have 13 point CP before each OFDM symbol.Such as
It is described by the occupied rear 7 ODFM symbols of downlink synchronous signal shown in Fig. 3, have follow at 15 points before first OFDM symbol
Ring prefix, all without cyclic prefix before rear 6 ODFM symbols.
In an advantageous embodiment, described according to cell ID and n-th in step 501PRBThe absolute frequency point of a frequency point
Call number is described n-thPRBPilot frequency locations in synchronization frame on a frequency point generate pilot frequency sequence, specific generating mode are as follows:
(1) generates the pilot frequency sequence according to the following formula:
Formula (1)
Wherein, k value range 0,1 ..., m-1, m are the sub-carrier number of the resource block of the synchronization frame, and the c is length
For MPNRandom sequence c (n), the MPN=m；
Wherein, random sequence c (n), n=0,1 ..., MPN- 1 (2) generation according to the following formula:
C (n)=(x1(n+NC)+x2(n+NC)) mod2 formula (2)
In formula (2), the x1For first m-sequence register, x1(3) generate according to the following formula；The x2It is second
A m-sequence register, x2(4) generate according to the following formula:
x1(n+31)=(x1(n+3)+x1(n)) mod2 formula (3)
x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n)) mod2 formula (4)
The wherein NC=1600,
First m-sequence initialization of register is x1(0)=1, x1(n)=0, n=1,2 ..., 30,
Second m-sequence initialization of register be
cinitInitial value are as follows:
Wherein, the SubBandIndex indicates described n-thPRBThe absolute frequency point call number of a frequency point,Indicate cell
Mark.
It is described that pilot frequency sequence generated is mapped to described n-th in the step 502PRBSynchronization frame on a frequency point
Corresponding pilot frequency locations, specifically include:
The formula (1) is obtained into the pilot frequency sequence of m point length, is respectively mapped to described according to identical mapping mode
nPRBOn m subcarrier of the corresponding pilot frequency locations of synchronization frame on a frequency point, the specific following formula of mapping mode (5):
Formula (5)
Wherein l indicates the serial number of the orthogonal frequency division multiplex OFDM symbol where pilot frequency locations.
Such as the pilot frequency locations for synchronization frame as shown in Figure 4, the pilot tone of 10 length is obtained using the formula (1)
Sequence is respectively mapped on 10 subcarriers of 2 OFDM symbols according to identical mapping mode, and specific mapping mode is as follows:
Wherein l=1,6 respectively indicate the pilot frequency locations where pilot signal, i.e., in the 1st OFDM symbol and the 6th OFDM
On symbol.In scene shown in Fig. 4, the m=10, i.e., the described pilot frequency sequence use length for 10 PN code.
In the further embodiment of the method for the invention, it is described pilot frequency sequence generated is mapped to it is described same
After the corresponding pilot frequency locations of step-frame, this method further comprises subsequent step 503:
Step 503 is directed to each frequency point, using the pilot frequency sequence be mappeding in the synchronization frame pilot frequency locations, generates
The time domain continuous signal that the frequency point emits on single antenna port in the corresponding OFDM symbol of the synchronization frame, and when emitting described
Domain continuous signal.
In the step 503, the utilization be mapped to the pilot frequency sequence in the synchronization frame pilot frequency locations, and generating should
The time domain continuous signal that frequency point emits on single antenna port in the corresponding OFDM symbol of the synchronization frame, specifically includes:
Using following formula (6), determine that the frequency point is sent out on single antenna port in the corresponding OFDM symbol of the synchronization frame
The time domain continuous signal penetrated
Formula (6)
Wherein: nPRBFor the serial number of the frequency point,
L is the serial number of the corresponding OFDM symbol of the synchronization frame, for the resource allocation side of synchronization frame as shown in Figure 4
Case, the l are 0 and 5；
0≤t<(Ncp,l+N)×Ts,
Ncp,lFor the length of the cyclic prefix CP of first of OFDM symbol,
N=64,For sampling interval, fsFor baseband sampling rate；More specifically, fs=128kHz；
For the number of subcarriers of a resource block of the synchronization frame, such as the money for synchronization frame shown in Fig. 4
Source allocation plan, should
△ f=2kHz.
The transmitting time domain continuous signal, specifically includes: n-thPRBThe OFDM symbol in synchronization frame on a frequency point from
L=0 starts the sequential transmission being incremented by according to l, and the OFDM symbol of l > 0 is at the moment in subframeStart to send out
It penetrates.
For the Resource Allocation Formula of synchronization frame as shown in Figure 4, different OFDM symbols has not in the synchronization frame
Same circulating prefix-length, is given by:
The generation processing method of the pilot frequency sequence of synchronization frame of the present invention, it is particularly possible to be suitable for that there is carrier wave polymerization
The wireless communication system of characteristic.The present invention can be by being frequency point n in the wireless communication system with carrier wave polymerization propertyPRB
On synchronization frame in pilot frequency locations generate different pilot frequency sequences, to meet system design considerations.
In addition, each embodiment of the invention can pass through the data processing by data processing equipment such as computer execution
Program is realized.Obviously, data processor constitutes the present invention.In addition, being commonly stored data in one storage medium
Processing routine is by directly reading out storage medium for program or by installing or copying to data processing equipment for program
It stores in equipment (such as hard disk and/or memory) and executes.Therefore, such storage medium also constitutes the present invention.Storage medium can be with
Use any kind of recording mode, such as paper storage medium (such as paper tape), magnetic storage medium (such as floppy disk, hard disk, flash memory
Deng), optical storage media (such as CD-ROM), magnetic-optical storage medium (such as MO) etc..
Therefore the invention also discloses a kind of storage mediums, wherein it is stored with data processor, the data processor
For executing any embodiment of the above method of the present invention.
In addition, method and step of the present invention is with data processor in addition to that can be realized, can also by hardware Lai
It realizes, for example, can be by logic gate, switch, specific integrated circuit (ASIC), programmable logic controller (PLC) and insertion microcontroller
Etc. realizing.Therefore this hardware that the method for the invention may be implemented also may be constructed the present invention.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (9)
1. a kind of generation processing method of pilot frequency in wireless communication system sequence characterized by comprising
According to cell ID and n-thPRBThe absolute frequency point call number of a frequency point is described n-thPRBIn synchronization frame on a frequency point
Pilot frequency locations generate pilot frequency sequence；
Pilot frequency sequence generated is mapped to described n-thPRBThe corresponding pilot frequency locations of synchronization frame on a frequency point；
Wherein, described according to cell ID and n-thPRBThe absolute frequency point call number of a frequency point is described n-thPRBOn a frequency point
Pilot frequency locations in synchronization frame generate pilot frequency sequence, specifically include:
(1) generates the pilot frequency sequence according to the following formula:
Wherein, k value range 0,1 ..., m-1, m are the sub-carrier number of the resource block of the synchronization frame, and the c is that length is MPN
Random sequence c (n), the MPN=m；
Wherein, random sequence c (n), n=0,1 ..., MPN- 1 (2) generation according to the following formula:
C (n)=(x1(n+NC)+x2(n+NC)) mod2 formula (2)
In formula (2), the x1For first m-sequence register, x1(3) generate according to the following formula；The x2For second m
Sequential register, x2(4) generate according to the following formula:
x1(n+31)=(x1(n+3)+x1(n)) mod2 formula (3)
x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n)) mod2 formula (4)
The wherein NC=1600,
First m-sequence initialization of register is x1(0)=1, x1(n)=0, n=1,2 ..., 30,
Second m-sequence initialization of register be
cinitInitial value are as follows:
Wherein, the SubBandIndex indicates described n-thPRBThe absolute frequency point call number of a frequency point,Indicate cell ID.
2. the method according to claim 1, wherein described be mapped to described for pilot frequency sequence generated
nPRBThe corresponding pilot frequency locations of synchronization frame on a frequency point, specifically include:
The formula (1) is obtained into the pilot frequency sequence of m point length, is respectively mapped to described n-th according to identical mapping modePRB
On m subcarrier of the corresponding pilot frequency locations of synchronization frame on a frequency point, the specific following formula of mapping mode (5):
Wherein l indicates the serial number of the orthogonal frequency division multiplex OFDM symbol where pilot frequency locations.
3. according to the method described in claim 2, it is characterized in that, the m=10.
4. the method according to claim 1, wherein described be mapped to the synchronization for pilot frequency sequence generated
After the corresponding pilot frequency locations of frame, this method further comprises:
The frequency point is generated described using the pilot frequency sequence be mappeding in the synchronization frame pilot frequency locations for each frequency point
The time domain continuous signal that the corresponding OFDM symbol of synchronization frame emits on single antenna port, and emit the time domain continuous signal.
5. according to the method described in claim 4, it is characterized in that, the utilization is be mapped in the synchronization frame pilot frequency locations
Pilot frequency sequence, generate the frequency point and continuously believe in the time domain that the corresponding OFDM symbol of the synchronization frame emits on single antenna port
Number, it specifically includes:
Using following formula (6), determine what the frequency point emitted on single antenna port in the corresponding OFDM symbol of the synchronization frame
Time domain continuous signal
Wherein: nPRBFor the serial number of the frequency point,
L is the serial number of the corresponding OFDM symbol of the synchronization frame,
0≤t < (Ncp,l+N)×Ts,
Ncp,lFor the length of the cyclic prefix CP of first of OFDM symbol,
N=64,For sampling interval, fsFor baseband sampling rate；
For the number of subcarriers of a resource block of the synchronization frame；
Δ f=2kHz.
6. according to the method described in claim 5, it is characterized in that, the transmitting time domain continuous signal, specifically includes:
N-thPRBThe sequential transmission that the OFDM symbol in synchronization frame on a frequency point is incremented by since l=0 according to l, l > 0 in subframe
OFDM symbol at the momentStart to emit.
7. method according to claim 1-6, which is characterized in that include in the downlink resource in the synchronization frame
13 ODFM symbols, wherein occupying preceding 6 ODFM symbols as downlink heartbeat resource, 7 ODFM symbols are as downlink after occupancy
Isochronous resources, wherein the time that preceding 6 ODFM symbols occupy is identical with the time of rear 7 ODFM symbols occupancy.
8. the method according to the description of claim 7 is characterized in that
In preceding 6 ODFM symbols, there are 13 dot cycle prefixes before each OFDM symbol；
After described in 7 ODFM symbols, there are 15 dot cycle prefixes before first OFDM symbol, before rear 6 ODFM symbols
All without cyclic prefix.
9. according to the method described in claim 8, it is characterized in that, in the downlink heartbeat resource:
The pilot signal of downlink heartbeat signal occupies first OFDM symbol and the last one OFDM in 6 ODFM symbols
Symbol is sent, and downlink heartbeat signal occupies the symbol of the OFDM between first OFDM symbol and the last one OFDM symbol
It number is sent.
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| CN101478338A (en) * | 2008-01-04 | 2009-07-08 | 大唐移动通信设备有限公司 | Multiplex transmission method for public reference signal and special reference signal |
| EP2445253A1 (en) * | 2009-06-18 | 2012-04-25 | Sharp Kabushiki Kaisha | Communication system, communication apparatus and communication method |
| CN103428143A (en) * | 2012-05-22 | 2013-12-04 | 普天信息技术研究院有限公司 | Method for sending synchronization signals |
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| CN101478338A (en) * | 2008-01-04 | 2009-07-08 | 大唐移动通信设备有限公司 | Multiplex transmission method for public reference signal and special reference signal |
| EP2445253A1 (en) * | 2009-06-18 | 2012-04-25 | Sharp Kabushiki Kaisha | Communication system, communication apparatus and communication method |
| CN103428143A (en) * | 2012-05-22 | 2013-12-04 | 普天信息技术研究院有限公司 | Method for sending synchronization signals |
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