CN104796377B

CN104796377B - Transmitter and communication system

Info

Publication number: CN104796377B
Application number: CN201510218022.XA
Authority: CN
Inventors: 王轶; 张元涛; 周华; 吴建明
Original assignee: Fujitsu Ltd
Current assignee: Fujitsu Ltd
Filing date: 2010-01-08
Publication date: 2018-06-01
Anticipated expiration: 2030-01-08

Abstract

The present invention relates to transmitters and communication system.The transmitter includes：Unrelated sequence maker, generation are used for the demodulated reference signal unrelated sequence of first resource block；First spectrum-spreading unit spreads demodulated reference signal with the element for the first frequency resource that will be mapped to first resource block in unrelated sequence with first group of orthogonal mask；Second spectrum-spreading unit spreads demodulated reference signal with the element for the second frequency resource that will be mapped to first resource block in unrelated sequence with second group of orthogonal mask；Second frequency resource and first frequency resource are the side frequency resources in the frequency resource elements sent in first resource block for demodulated reference signal, second group of code and first group of code row mirror image each other；And map unit, for the element after spread spectrum to be respectively mapped to the first and second frequency resources.The method and apparatus of the present invention can increase the randomization of pilot tone, overcome the problems, such as that pilot tone transmit power is unbalanced, meet the orthogonality demand of time-frequency bidimensional.

Description

Transmitter and communication system

The application is the applying date on 01 08th, 2010, and Application No. 201080060993.1 is entitled " orthogonal The divisional application of the application for a patent for invention of mask generating means, demodulated reference signal generating means and method ".

Technical field

The present invention relates to the transmission technology in wireless communication system, more specifically to being used in LTE/LTE-A systems Orthogonal mask generating means, demodulated reference signal generating means and method.

Background technology

Next-Generation Wireless Communication Systems LTE (long term evolution, Long Term Evolution)-Advanced of 3GPP will Downlink is asked to provide the peak rate of 1Gps, the peaks spectrum efficiency of 30bps/Hz, this brings for system physical layer transmission plan Challenge.The multiaerial system of multiple-input, multiple-output (Multiple input multiple output, MIMO) can be supported parallel Data flow is sent, so as to greatly increase the handling capacity of system.In normal circumstances, the data streams in parallel in multi-antenna transmission is first Independent forward error correction coding is first carried out, then the code word after coding is mapped on one or more data transfer layer. When code word is mapped as multiple transport layers, it is corresponding multilayer that the serial data of encoder output is carried out serial to parallel conversion. In once transmitting, all numbers of plies that system is supported are also known as the rank number (Rank) of this transmission.The data of each layer are converted It is known as the precoding process of signal for the process of the data on each physical antenna.LTE-Advanced Rel-10 support maximum order Number is 8 precoding technique.

Carrying out MIMO decodings and correlation demodulation, transmitting terminal for receiving terminal need to transmit to estimate the pilot frequency sequence of channel, i.e., Demodulated reference signal (Demodulation reference signal, DMRS).The design of DMRS need to meet each data transmission The corresponding DMRS of layer is mutually orthogonal, that is, ensures that equivalent channel of the channel of each transmission antenna after precoding is noiseless. In Rel-10 systems, side that the corresponding DMRS of each data transfer layer passes through frequency division multiplexing (FDM) and/or code division multiplexing (CDM) Formula distinguishes.Code division multiplexing is ideal to correlation by orthogonal mask sequence (Orthogonal Cover Code) Sequence carries out spread spectrum realization.Orthogonal mask sequence generally use Walsh sequences, discrete Fourier transform (DFT) sequence etc..

During the present invention is made, inventor has found, if orthogonal mask sequence is mapped in time-domain, that is, exists Time-domain is spread, then often assumes that the channel on the corresponding physical resource of the mask code sequence is identical.Assuming that spread spectrum The sequence spread spectrum factor is M, then, it is believed that the channel response of M OFDM symbol is identical.This hypothesis is only in low-speed motion environment It sets up, with the increase of mobile station translational speed, the channel response variation increase of M OFDM symbol, the orthogonality quilt of spreading code It destroys, so that each data transfer layer interferes with each other, reduces the precision of channel estimation.

Meanwhile in Rel-10 systems, DMRS passes through the precoding processing identical with data, is mapped to each transmission antenna On.Precoding processing causes the corresponding DMRS of each data transfer layer of code division multiplexing to carry out linear superposition, when M data transmission When the corresponding DMRS of layer is superimposed in the same direction, the signal that amplitude is M is obtained, and when the corresponding DMRS of M data transfer layer is reversely superimposed When, it cancels out each other to obtain the signal that amplitude is 0.If the power imbalances of this each transmission antenna go out in entire frequency domain bandwidth It is existing, transmit power efficiency can be substantially reduced.

It should be noted that the introduction of technical background is intended merely to above it is convenient technical scheme is carried out it is clear, Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes the present invention Background section is set forth and thinks that above-mentioned technical proposal is known to those skilled in the art.

The bibliography of the present invention is listed below, is incorporated them by quoting in this, as made in the present specification Detailed description.

1st, [patent document 1]：Hooli Kari,Pajukoski Ka,et al.,Method,apparatuses, system and related computer product for resource allocation(WO 2009056464A1)

2nd, [patent document 2]：Che Xiangguang,Guo Chunyan,et al.,Variable transmission structure for reference signals in uplink messages(WO 2009022293A2)

3rd, [patent document 3]：Cho Joon-young,Zhang Jianzhong,et al.,Apparatus and method for allocating code resource to uplink ACK/NACK channels in a cellular wireless communication system(US 2009046646A1)

4th, [patent document 4]：Yang Yunsong,Kwon Younghoon,System and method for adaptively controlling feedback information(US 20090209264A1)

5th, [patent document 5]：Pajukoski Kari P,Tiirola Esa,Providing improved scheduling request signaling with ACK/NACK or CQI(US 20090100917)

6th, [patent document 6]：Li Don,Yang Guang,Multi-channel spread spectrum system (US20020015437A1)

The content of the invention

Embodiments of the present invention are in view of the above problem of the prior art is made, for overcoming or alleviated by the one of the prior art The shortcomings that a or more, provides at a kind of beneficial selection.In order to realize above-mentioned purpose, the present invention provides following sides Face.

Aspect 1, a kind of demodulated reference signal maker, for generating demodulated reference signal, the demodulated reference signal life Grow up to be a useful person including：

Unrelated sequence maker, for generating the pilot tone unrelated sequence for first resource block；

First spectrum-spreading unit, for using first group of orthogonal mask to the pilot tone with will be mapped to institute in unrelated sequence The element for stating the first frequency resource of first resource block is spread；

Second spectrum-spreading unit, for using second group of orthogonal mask to the pilot tone with will be mapped to institute in unrelated sequence The element for stating the second frequency resource of first resource block is spread；The second frequency resource is with the first frequency resource For the side frequency resource of the first group data stream, second group of orthogonal mask and first group of orthogonal mask row mirror each other Picture；And

Map unit, for that will be spread through the element after first spectrum-spreading unit spread spectrum and through second spectrum-spreading unit Element afterwards is respectively mapped in the first frequency resource and the second frequency resource of the first resource block.

Aspect 2, the demodulated reference signal maker according to aspect 1, which is characterized in that the demodulated reference signal life It grows up to be a useful person and further includes：

3rd spectrum-spreading unit, for using the 3rd group of orthogonal mask to will be mapped in the pilot tone unrelated sequence The element of 3rd frequency resource is spread；

4th spectrum-spreading unit, for using the 4th group of orthogonal mask to the pilot tone with will be mapped in unrelated sequence The element of four frequency resources is spread；3rd frequency resource is directed to the second group data stream with the 4th frequency resource Side frequency resource, the 3rd group of orthogonal mask and the 4th group of orthogonal mask row mirror image each other,

The map unit also expands by the element after the 3rd spectrum-spreading unit spread spectrum and through the 4th spectrum-spreading unit Element after frequency is respectively mapped in the 3rd frequency resource and the 4th frequency resource.

Aspect 3, the demodulated reference signal maker according to aspect 2, which is characterized in that the 4th group of orthogonal mask It is by first group of orthogonal mask and second group of orthogonal mask with one group in the 3rd group of orthogonal mask One group of carry out column vector cyclic shift formation.

Aspect 4, the demodulated reference signal maker according to aspect 3, which is characterized in that identical column vector is described In first group of orthogonal mask, second group of orthogonal mask, the 3rd group of orthogonal mask and the 4th group of orthogonal mask Row sequence number is different.

Aspect 5, the demodulated reference signal maker according to aspect 1, which is characterized in that

The unrelated sequence maker generation is for the pilot tone unrelated sequence of Secondary resource block, the Secondary resource Block is adjacent with the first resource block；

First spectrum-spreading unit utilizes first group of orthogonal mask to the pilot tone for Secondary resource block with non- The element that will be mapped to the first frequency resource of the Secondary resource block in correlated series is spread；

Second spectrum-spreading unit utilizes second group of orthogonal mask to the pilot tone for Secondary resource block with non- The element that will be mapped to the second frequency resource of the Secondary resource block in correlated series is spread；The Secondary resource block Second frequency resource and the first frequency resource of the Secondary resource block are the adjacent frequencies for first group data stream Rate resource；

The map unit will also expand in the pilot tone unrelated sequence for Secondary resource block through described first The element of frequency unit spread spectrum and the element spread through second spectrum-spreading unit are respectively mapped to the Secondary resource In the first frequency resource of block and the second frequency resource of the Secondary resource block, wherein

The first frequency resource of the Secondary resource block and the first frequency resource or second frequency of the first resource block Resource corresponds to, the second frequency resource of the Secondary resource block and the second frequency resource or first frequency of the first resource block Resource corresponds to so that in the first resource block and the Secondary resource block, will be mapped to for first group data stream Side frequency resource on the pilot tone unrelated sequence for first resource block in and/or for Secondary resource block Pilot tone unrelated sequence in element spread respectively by first group of orthogonal mask and second group of orthogonal mask.

Aspect 6, the demodulated reference signal maker according to aspect 1, which is characterized in that

The unrelated sequence maker also generates the pilot tone unrelated sequence for Secondary resource block, second money Source block is adjacent with the first resource block；

First spectrum-spreading unit utilizes the 3rd group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the first frequency resource of the Secondary resource block in sequence is spread；

Second spectrum-spreading unit utilizes the 4th group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the second frequency resource of the Secondary resource block in sequence is spread；The second of the Secondary resource block Frequency resource and the first frequency resource of the Secondary resource block are the side frequency resources for first group data stream；Institute The 4th group of orthogonal mask and the 3rd group of orthogonal mask row mirror image each other are stated,

The map unit will be spread in the pilot tone unrelated sequence for Secondary resource block through described first The element of unit spread spectrum and the element spread through second spectrum-spreading unit are respectively mapped to the first frequency of the Secondary resource block In rate resource and the second frequency resource of the Secondary resource block, wherein

The first frequency resource of the Secondary resource block and the first frequency resource or second frequency of the first resource block Resource corresponds to, the second frequency resource of the Secondary resource block and the second frequency resource or first frequency of the first resource block Resource corresponds to so that in the first resource block and the Secondary resource block, will be mapped to for first group data stream Side frequency resource on the pilot tone unrelated sequence for first resource block in and/or for Secondary resource block Pilot tone unrelated sequence in element spread respectively by first group of orthogonal mask and second group of orthogonal mask, will The pilot tone for first resource block in the side frequency resource for second group data stream is mapped to irrelevant Element in sequence and/or for Secondary resource block pilot tone unrelated sequence is respectively by the 3rd group of orthogonal mask It is spread with the 4th group of orthogonal mask,

One in the 4th group of orthogonal mask and the 3rd group of orthogonal mask is by orthogonal to described first group One group of carry out column vector cyclic shift formation in mask and second group of orthogonal mask.

Aspect 7, the demodulated reference signal maker according to aspect 6, which is characterized in that identical column vector is described In first group of orthogonal mask, second group of orthogonal mask, the 3rd group of orthogonal mask and the 4th group of orthogonal mask Row sequence number is different.

Aspect 8, the demodulated reference signal maker according to aspect 2, which is characterized in that

First spectrum-spreading unit utilizes the 5th group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the first frequency resource of the Secondary resource block in sequence is spread；

Second spectrum-spreading unit utilizes the 6th group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the second frequency resource of the Secondary resource block in sequence is spread；The second of the Secondary resource block Frequency resource and the first frequency resource of the Secondary resource block are the side frequency resources for first group data stream；Institute The 6th group of orthogonal mask and the 5th group of orthogonal mask row mirror image each other are stated,

3rd spectrum-spreading unit utilizes the 7th group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the 3rd frequency resource of the Secondary resource block in sequence is spread；

4th spectrum-spreading unit utilizes the 8th group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the 4th frequency resource of the Secondary resource block in sequence is spread；The 3rd of the Secondary resource block Frequency resource and the 4th frequency resource of the Secondary resource block are the side frequency resources for second group data stream；Institute The 7th group of orthogonal mask and the 8th group of orthogonal mask row mirror image each other are stated,

The map unit will also be spread in the second pilot tone of Secondary resource block unrelated sequence through described first The element that unit, second spectrum-spreading unit, the 3rd spectrum-spreading unit and the 4th spectrum-spreading unit are spread is respectively mapped to described second In the first frequency resource of resource block, second frequency resource, the 3rd frequency resource and the 4th frequency resource.

Aspect 9, the demodulated reference signal maker according to aspect 8, which is characterized in that identical column vector is described In 5th group of orthogonal mask, the 6th group of orthogonal mask, the 7th group of orthogonal mask and the 8th group of orthogonal mask Row sequence number is different, one in the 5th group of orthogonal mask and the 6th group of orthogonal mask be by described first group just What friendship mask and the column vector cyclic shift of one group of first displacement of carry out in second group of orthogonal mask were formed, the described 7th One in group orthogonal mask and the 8th group of orthogonal mask is by first group of orthogonal mask and second group described What the column vector cyclic shift of one group of carry out second displacement in orthogonal mask was formed.

Aspect 10, the demodulated reference signal maker according to aspect 1, which is characterized in that described first group orthogonal to cover Code character and second group of orthogonal mask group are all Walsh codes sequence or are all Fourier's change sequences.

Aspect 11, a kind of demodulated reference signal generation method, for generating demodulated reference signal, the demodulated reference signal Generation method includes：

Unrelated sequence generation step, for generating the pilot tone unrelated sequence for first resource block；

First spreading step, for using first group of orthogonal mask to the pilot tone with will be mapped to institute in unrelated sequence The element for stating the first frequency resource of first resource block is spread；

Second spreading step, for using second group of orthogonal mask to the pilot tone with will be mapped to institute in unrelated sequence The element for stating the second frequency resource of first resource block is spread；The second frequency resource is with the first frequency resource For the side frequency resource of the first group data stream, second group of orthogonal mask and first group of orthogonal mask row mirror each other Picture；And

Mapping step, for that will be spread through the element after first spreading step spread spectrum and through second spreading step Element afterwards is respectively mapped in the first frequency resource and the second frequency resource of the first resource block.

Aspect 12, the demodulated reference signal generation method according to aspect 11, which is characterized in that the demodulation reference letter Number generation method further includes：

3rd spreading step, for using the 3rd group of orthogonal mask to will be mapped in the pilot tone unrelated sequence The element of 3rd frequency resource is spread；

4th spreading step, for using the 4th group of orthogonal mask to the pilot tone with will be mapped in unrelated sequence The element of four frequency resources is spread；3rd frequency resource is directed to the second group data stream with the 4th frequency resource Side frequency resource, the 3rd group of orthogonal mask and the 4th group of orthogonal mask row mirror image each other,

The mapping step also expands by the element after the 3rd spreading step spread spectrum and through the 4th spreading step Element after frequency is respectively mapped in the 3rd frequency resource and the 4th frequency resource.

Aspect 13, the demodulated reference signal generation method according to aspect 12, which is characterized in that described 4th group orthogonal One group in mask and the 3rd group of orthogonal mask is by orthogonal being covered to first group of orthogonal mask and described second group One group of carry out column vector cyclic shift formation in code.

Aspect 14, the demodulated reference signal generation method according to aspect 13, which is characterized in that identical column vector exists First group of orthogonal mask, second group of orthogonal mask, the 3rd group of orthogonal mask and the 4th group of orthogonal mask In row sequence number it is different.

Aspect 15, the demodulated reference signal generation method according to aspect 11, which is characterized in that

The unrelated sequence generation step generation is for the pilot tone unrelated sequence of Secondary resource block, second money Source block is adjacent with the first resource block；

First spreading step utilizes first group of orthogonal mask to the pilot tone for Secondary resource block with non- The element that will be mapped to the first frequency resource of the Secondary resource block in correlated series is spread；

Second spreading step utilizes second group of orthogonal mask to the pilot tone for Secondary resource block with non- The element that will be mapped to the second frequency resource of the Secondary resource block in correlated series is spread；The Secondary resource block Second frequency resource and the first frequency resource of the Secondary resource block are the adjacent frequencies for first group data stream Rate resource；

The mapping step will also expand in the pilot tone unrelated sequence for Secondary resource block through described first The element of frequency step spread spectrum and the element spread through second spreading step are respectively mapped to the Secondary resource In the first frequency resource of block and the second frequency resource of the Secondary resource block, wherein

Aspect 16, the demodulated reference signal generation method according to aspect 11, which is characterized in that

The unrelated sequence generation step also generates the pilot tone unrelated sequence for Secondary resource block, and described second Resource block is adjacent with the first resource block；

First spreading step utilizes the 3rd group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the first frequency resource of the Secondary resource block in sequence is spread；

Second spreading step utilizes the 4th group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the second frequency resource of the Secondary resource block in sequence is spread；The second of the Secondary resource block Frequency resource and the first frequency resource of the Secondary resource block are the side frequency resources for first group data stream；Institute The 4th group of orthogonal mask and the 3rd group of orthogonal mask row mirror image each other are stated,

The mapping step will be spread in the pilot tone unrelated sequence for Secondary resource block through described first The element of step spread spectrum and the element spread through second spreading step are respectively mapped to the first frequency of the Secondary resource block In rate resource and the second frequency resource of the Secondary resource block, wherein

Aspect 17, the demodulated reference signal generation method according to aspect 16, which is characterized in that identical column vector exists First group of orthogonal mask, second group of orthogonal mask, the 3rd group of orthogonal mask and the 4th group of orthogonal mask In row sequence number it is different.

Aspect 18, the demodulated reference signal generation method according to aspect 12, which is characterized in that

First spreading step utilizes the 5th group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the first frequency resource of the Secondary resource block in sequence is spread；

Second spreading step utilizes the 6th group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the second frequency resource of the Secondary resource block in sequence is spread；The second of the Secondary resource block Frequency resource and the first frequency resource of the Secondary resource block are the side frequency resources for first group data stream；Institute The 6th group of orthogonal mask and the 5th group of orthogonal mask row mirror image each other are stated,

3rd spreading step utilizes the 7th group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the 3rd frequency resource of the Secondary resource block in sequence is spread；

4th spreading step utilizes the 8th group of orthogonal mask to the pilot tone for Secondary resource block with irrelevant The element that will be mapped to the 4th frequency resource of the Secondary resource block in sequence is spread；The 3rd of the Secondary resource block Frequency resource and the 4th frequency resource of the Secondary resource block are the side frequency resources for second group data stream；Institute The 7th group of orthogonal mask and the 8th group of orthogonal mask row mirror image each other are stated,

The mapping step will also be spread in the second pilot tone of Secondary resource block unrelated sequence through described first The element that step, second spreading step, the 3rd spreading step and the 4th spreading step are spread is respectively mapped to described second In the first frequency resource of resource block, second frequency resource, the 3rd frequency resource and the 4th frequency resource.

Aspect 19, the demodulated reference signal generation method according to aspect 18, which is characterized in that identical column vector exists The 5th group of orthogonal mask, the 6th group of orthogonal mask, the 7th group of orthogonal mask and the 8th group of orthogonal mask In row sequence number it is different, one in the 5th group of orthogonal mask and the 6th group of orthogonal mask is by described first What group orthogonal mask and the column vector cyclic shift of one group of first displacement of carry out in second group of orthogonal mask were formed, it is described One in 7th group of orthogonal mask and the 8th group of orthogonal mask is by first group of orthogonal mask and described What the column vector cyclic shift of one group of carry out second displacement in two groups of orthogonal masks was formed.

Aspect 20, the demodulated reference signal generation method according to aspect 11, which is characterized in that described first group orthogonal Mask set and second group of orthogonal mask group are all Walsh codes sequence or are all Fourier's change sequences.

Aspect 21, a kind of orthogonal mask generating means, the orthogonal mask generating means include：Basic orthogonal code obtains dress Put, unit map, row cycle shift unit and group are to a group acquiring unit,

The basis orthogonal code acquisition device is for one group of basis orthogonal code of acquisition；

The row cycle shift unit is used to carry out the basic orthogonal code that the basic orthogonal code acquisition device is generated Column vector cyclic shift；

The unit map is used for the basic orthogonal code that basic orthogonal code acquisition device is generated into ranks image, thus First pair of basic orthogonal code sets pair is obtained, the unit map is additionally operable to described after row cycle shift unit row cyclic shift Basic orthogonal code into ranks image, so as to obtain second pair of orthogonal mask group pair.

Aspect 22, the orthogonal mask generating means according to aspect 21, the displacement of wherein column vector cyclic shift can Variation.

Aspect 23, the orthogonal mask generating means according to aspect 21, the orthogonal mask generating means further include group To a group acquiring unit, described group is used to control row cycle shift unit and unit map to group acquiring unit, so as to Obtaining same column row number in different orthogonal mask groups has different row numbers to have differentiation orthogonal mask group to group.

It is proposed according to the present invention for generating the method and apparatus of orthogonal mask, can increase pilot tone randomization or It can overcome the problems, such as that transmission pilot power is unbalanced or can meet the orthogonality demand of time-frequency bidimensional, can provide more For the channel estimating performance of robust.

With reference to following explanation and attached drawing, these of the invention will become clearer with further aspect and feature. In the explanation and attached drawing, only certain exemplary embodiments of this invention is disclosed in detail, specifying the principle of the present invention can be by By the way of.It should be understood that the present invention is not so limited in scope.In the spirit and terms of appended claims In the range of, the present invention includes many changes, modifications and is equal.

The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more Used in a other embodiment, with the feature in other embodiment it is combined or substitute other embodiment in feature.

It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.

Description of the drawings

By the detailed description below in conjunction with attached drawing, above-mentioned and other purposes of the invention, feature and advantage will more It is clear that in the accompanying drawings：

Figure 1A shows the schematic diagram of the demodulated reference signal generating means according to one embodiment of the present invention.

Figure 1B shows the schematic diagram of the demodulated reference signal generating means according to one embodiment of the present invention.

Fig. 2 and Fig. 3 show a kind of advantages of demodulated reference signal generating means according to the present invention.

Fig. 4 shows the flow diagram of the method according to the invention generation orthogonal mask group pair.

Fig. 5 A show the flow chart of the demodulated reference signal generation method according to one embodiment of the present invention.

Fig. 5 B show the schematic diagram of the demodulated reference signal generation method according to another embodiment of the present invention.

Fig. 6 shows an implementation of the downlink DMRS resources generated using the demodulated reference signal generation method of the present invention The schematic diagram of example.

Fig. 7 shows another reality of the downlink DMRS resources generated using the demodulated reference signal generation method of the present invention Apply the schematic diagram of example.

Fig. 8 shows 4 groups of orthogonal mask sequences (row number, which has, distinguishes orthogonal mask group to the group) warp generated according to the present invention The power distribution schematic diagram being mapped to after precoding on the 1st transmission antenna.

Fig. 9 and Figure 10 shows a kind of spread processing of the embodiment according to the invention to Secondary resource block.

Figure 11 and Figure 12 shows spread processing of the another embodiment according to the invention to Secondary resource block.

Figure 13 shows the schematic diagram of the orthogonal mask group generating means according to one embodiment of the present invention.

Figure 14, which is shown, can be used for implementing the schematic block diagram with the computer of device according to the method for the embodiment of the present invention.

Figure 15 shows the signal sexual function of the transmitter of the demodulated reference signal generating means and method using the present invention Block diagram.

Specific embodiment

The preferred embodiment of the present invention is described in detail with reference to the accompanying drawings, be omitted in the course of the description for Unnecessary details and function for the present invention, to prevent the understanding of the present invention from causing to obscure.

Figure 1A shows the schematic diagram of the demodulated reference signal generating means according to one embodiment of the present invention.Such as Figure 1A Shown, a kind of demodulated reference signal generating means 100 of embodiment according to the invention include unrelated sequence generation unit 101st, the first spectrum-spreading unit 102, the second spectrum-spreading unit 103 and map unit 104.

For unrelated sequence generation unit 101 for generating pilot tone unrelated sequence, pilot tone is related with unrelated sequence Property should the more satisfactory (sequence of smaller even 0) of correlation.Here unrelated sequence such as Zadoff-Chu sequence Or PN code sequences.It may be employed that those skilled in the art are currently known or any method for knowing generates Zadoff- in the future The unrelated sequences such as Chu sequences or PN code sequences.It is no longer described in detail herein.Such as unrelated sequence generation unit 101 generate the unrelated sequence (a, c) for a certain resource block.

First spectrum-spreading unit 102 will be used for using first group of orthogonal mask to will map in the pilot tone unrelated sequence Element (such as a) to first frequency resource is spread.

Second spectrum-spreading unit 103 will be used for using second group of orthogonal mask to will map in the pilot tone unrelated sequence Element (such as c) to second frequency resource is spread；The second frequency resource is to be directed to the first frequency resource The side frequency resource of first group data stream, second group of orthogonal mask and second group of orthogonal mask row mirror image each other. First group of orthogonal mask and second group of orthogonal mask are properly termed as orthogonal mask group pair.

Map unit 104 is used for the element after first spectrum-spreading unit spread spectrum in the pilot tone unrelated sequence It is mapped to the element after second spectrum-spreading unit spread spectrum in corresponding frequencies resource, that is, is respectively mapped to first frequency resource In second frequency resource.

In one embodiment, first group of orthogonal mask and second group of orthogonal mask are walsh codes.In another kind In embodiment, first group of orthogonal mask and second group of orthogonal mask are Discrete Fourier Transform (DFT) sequences.Described One group of orthogonal mask and second group of orthogonal mask can also use other well known orthogonal mask sequence.For convenience of description, It is only illustrated below by taking walsh codes as an example.

Fig. 2 and Fig. 3 show a kind of advantages of demodulated reference signal generating means according to the present invention.It is led using 4 During frequency signal, as shown in Fig. 2, in the prior art, only use one group of orthogonal mask, the spreading length of time domain be 4 (a ,-a, A ,-a or c ,-c, c ,-c).And as shown in figure 3, using embodiment according to the invention demodulated reference signal generating means, 4 pilot signals can be respectively mapped on two subcarriers, so that the spreading length in time domain is reduced to 2, from And reduce the requirement to the translational speed of mobile station.

On the other hand, power distribution can also be made to become more uniformly, this will will be described later.The present invention simultaneously should not One embodiment solves existing whole technical problems in the prior art, has the present invention without an embodiment The whole technological merits mentioned.

Illustrate the generation of orthogonal mask sequence below.

Fig. 4 shows the flow diagram of the method according to the invention generation orthogonal mask group pair.In this example, common property 8 groups of orthogonal mask sequences are given birth to, every group of orthogonal mask sequence includes 4 orthogonal sequences, and each orthogonal sequence length is 4.This shows In example, the orthogonal mask sequence of generation is Walsh sequences.It should be noted that the numbers such as 4,8 here be merely to illustrate that it is clear Purpose used in, be not the limitation to protection scope of the present invention.

As shown in figure 4, specifically include following steps：

Step S401 generates one group of orthogonal mask sequence.In the case shown in figure 4, with Matrix C₁=[C_1,1；C_1,2； C_1,3；C_1,4] represent.This group of orthogonal mask sequence (orthogonal mask group) includes 4 orthogonal sequences mutually orthogonal, length is 4

Such as in Fig. 4, have

And so on.

Step S402 obtains one group of new orthogonal mask sequence C to this group of orthogonal mask sequence C 1 into ranks mirror image processing₂ =[C_2,1；C_2,2；C_2,3；C_2,4]=[C_1,4；C_1,3；C_1,2；C_1,1]。

Thus obtain the orthogonal mask group pair that a pair of matched set uses.

Further, when the orthogonal mask group pair for needing more to match, this method can also include：

Step S403, by this group of orthogonal sequence C₁Column vector cyclic shift processing is carried out, obtains one group of new orthogonal mask Sequence C₃=[C_3,1；C_3,2；C_3,3；C_3,4]；Then

Step S404, to orthogonal mask sequence group C₃Into ranks mirror image processing, another group of new orthogonal mask sequence C is obtained₄ =[C_4,1；C_4,2；C_4,3；C_4,4]。

The cyclic shift p of column vector cyclic shift processing can change, such as in the case of figure 4, cyclic shift p can be with Equal to 1,2 and 3.Thus when needing the group pair more to match, step S403 and step S404 can be repeatedly.Every time Change cyclic shift p.

Fig. 4 shown as p=2, the C of gained₃And C₄.Fig. 4 is also shown as P=3, and another pair of gained is orthogonal to be covered Code character C₅And C₆And as P=1, another pair orthogonal mask group C of gained₇And C₈。

Preferably, when needing to select two pairs of orthogonal mask groups pair, the identical column vector of orthogonal mask sequence can be made to exist The row sequence number of every two pairs of orthogonal masks group centering is different, that is, forming row number has differentiation mask vector group to group.With in this example complete 1 Column vector exemplified by, in C₁~C₄It is middle to correspond to the 1st, 4,3,2 row respectively, and in C₅~C₈Middle the 4th, 1,2,3 row corresponding respectively, and This 8 groups of orthogonal mask sequence matrix are not mutually equal, thus can be by C₁~C₄It is used in conjunction with, and C₅~C₈It is used in conjunction with.Here C₁ ~C₄Constituting row number has differentiation mask vector group to group, C₅~C₈Constituting row number has differentiation mask vector group to group.Equally Ground, in C₁、C₂、C₇And C₈In, complete 1 column vector arranges respectively the 1st, 4,2,3, in C₃、C₄、C₅And C₆In, complete 1 column vector point It is not arranged the 3rd, 2,4,1, thus C₃、C₄、C₅And C₆It can be used in conjunction with, C₁、C₂、C₇And C₈It can be used in conjunction with.C₃、C₄、C₅With C₆Also constituting row number has differentiation mask vector group to group, C₁、C₂、C₇And C₈Also constituting row number has differentiation mask vector group pair Group.Using row number have distinguish mask vector group to group the advantages of be that the power in each frequency resource of transmission pilot tone can be made equal Weighing apparatus, this is described below.

All orthogonal mask group can obtained to afterwards, by certain method come choose row number have distinguish mask to Amount group can also increase judgment step after every progress one cycle displacement, see that whether forming row number has differentiation mask to group Vector Groups choose suitable orthogonal mask group pair, and abandon inappropriate orthogonal mask group pair to group.

In generated 8 groups of orthogonal mask sequences, by each orthogonal mask group to (orthogonal mask sequence matrix group to) C₁ With C₂、C₃With C₄、C₅With C₆And C₇With C₈In element composition vector meet mutually orthogonal relation.With C₁With C₂Exemplified by, [C₁₁, C₁₂,C₂₁,C₂₂] it is mutually orthogonal, [C₁₃,C₁₄,C₂₃,C₂₄] and orthogonal, etc., it will thus be seen that so obtain Orthogonal mask group is to that can realize the orthogonalities of two dimensions of frequency and time.

Figure 1B shows the schematic diagram of the demodulated reference signal generating means according to another embodiment of the present invention.Such as figure Shown in 1B, a kind of 100 ＇ of demodulated reference signal generating means of embodiment according to the invention, which is removed, includes non-phase shown in FIG. 1 It closes outside sequence generating unit 101, the first spectrum-spreading unit 102, the second spectrum-spreading unit 103 and map unit 104, further includes the Three spectrum-spreading units 105, the 4th spectrum-spreading unit 106.

In 100 ＇ of demodulated reference signal generating means preferably, the unrelated sequence maker generates pilot tone Use unrelated sequence.Such as generate pilot tone unrelated sequence (a, b, c, d).

First spectrum-spreading unit 102 is used to utilize first group of orthogonal mask (such as C₁) in the pilot tone unrelated sequence The element (such as a) that will be mapped to first frequency resource is spread.

Second spectrum-spreading unit 103 is used to utilize second group of orthogonal mask (such as C₂) in the pilot tone unrelated sequence The element (such as c) that will be mapped to second frequency resource is spread；The second frequency resource and the first frequency resource It is the side frequency resource for the first group data stream, second group of orthogonal mask arranges each other with second group of orthogonal mask Mirror image.First group of orthogonal mask and second group of orthogonal mask are properly termed as orthogonal mask group pair.First group data stream is, for example, 1st, 2,5,6 layer data stream.Herein, the second frequency resource and the first frequency resource are both for first group of data The frequency resource of stream, it is meant that the pilot tone that two frequency resources are carried is for the first group data stream.

3rd spectrum-spreading unit 105 is used to (such as utilize C using the 3rd group of orthogonal mask₃) to the pilot tone with irrelevant sequence The element (such as b) that will be mapped to the 3rd frequency resource in row is spread.

4th spectrum-spreading unit 106 is used to utilize the 4th group of orthogonal mask (such as C₄) in the pilot tone unrelated sequence The element (such as d) that will be mapped to the 4th frequency resource is spread；3rd frequency resource and the 4th frequency resource It is side frequency resource for second group data stream, the 3rd group of orthogonal mask and the 4th group of orthogonal mask are each other Row mirror image.Herein, the 3rd frequency resource and the 4th frequency resource are both for the frequency of the second group data stream Resource, it is meant that the pilot tone that two frequency resources are carried is for the second group data stream.Second group data stream is, for example, 3rd, 4,7,8 layer of data flow.

Preferably, first group of orthogonal mask and second group of orthogonal mask and the 3rd group of orthogonal mask and it is described 4th group just Mask set is handed over to have into row number and distinguishes orthogonal mask group to group, such as C as shown above₁、C₂With C₃And C₄Combined situation. But it's not necessary, can also use such as C₁、C₂With C₅And C₆Combination.

As shown in Figure 5A, first, in step S501, unrelated sequence generation unit 101 generates pilot tone unrelated sequence. Here pilot tone unrelated sequence such as Zadoff-Chu sequence or PN code sequences.It is present that those skilled in the art may be employed It is known or any method for knowing generates the correlated serieses such as Zadoff-Chu sequence or PN code sequences in the future.Herein not into Row detailed description.

In step S502, the first spectrum-spreading unit 102 is using first group of orthogonal mask to that will be mapped in the unrelated sequence Element to first frequency resource is spread.

In step S503, the second spectrum-spreading unit 103 is using second group of orthogonal mask to that will be mapped in the unrelated sequence Element to second frequency resource is spread；The second frequency resource is for same group of number with the first frequency resource According to stream, adjacent frequency resource, second group of orthogonal mask and second group of orthogonal mask row mirror image each other.First group Orthogonal mask and second group of orthogonal mask are properly termed as orthogonal mask group pair.

Then in step S504, map unit 104 will be single through the described first spread spectrum in the pilot tone unrelated sequence Element after member spread spectrum and the element mapping after second spectrum-spreading unit spread spectrum and in corresponding frequencies resource, i.e., reflect respectively It is mapped in first frequency resource and second frequency resource.

It is readily conceivable that step S502 and step S503 can be carried out in succession, can also carry out parallel.

As shown in Figure 5 B, the demodulated reference signal generation method of a kind of embodiment according to the invention, first in step S501, generates pilot tone unrelated sequence, the correlation of each unrelated sequence should it is relatively good (it is small, even 0).Here phase Close sequence such as Zadoff-Chu sequence or PN code sequences.

Then, in step S502, the first spectrum-spreading unit is using first group of orthogonal mask to the pilot tone unrelated sequence In will be mapped to the element of first frequency resource and spread.

In step S503, the second spectrum-spreading unit is using second group of orthogonal mask to being incited somebody to action in the multiple first unrelated sequence The element for being mapped to second frequency resource is spread；The second frequency resource is for first with the first frequency resource The side frequency resource of group data stream, second group of orthogonal mask and first group of orthogonal mask row mirror image each other.

Different from the demodulated reference signal generation method shown in Fig. 5 A, the demodulated reference signal generation method shown in Fig. 5 B is also Including step S505 and S506.

In step S505, the 3rd spectrum-spreading unit is using the 3rd group of orthogonal mask to that will be reflected in the pilot tone unrelated sequence The element for being mapped to the 3rd frequency resource is spread.

In step S506, the 4th spectrum-spreading unit is using the 4th group of orthogonal mask to that will be reflected in the pilot tone unrelated sequence The element for being mapped to the 4th frequency resource is spread；4th frequency resource and the 3rd frequency resource are for described the The side frequency resource of two group data streams, the 4th group of orthogonal mask and the 3rd group of orthogonal mask row mirror image each other.

And preferably, the 4th group of orthogonal mask and the 3rd group of orthogonal mask and described first group orthogonal are covered The group of code and second group of orthogonal mask composition, which is configured to group row number, has differentiation orthogonal mask group to group.

In step S504, map unit 104 is by the pilot tone after first spectrum-spreading unit to the 4th spectrum-spreading unit is spread It is mapped to the element of unrelated sequence in corresponding frequencies resource, that is, is respectively mapped to first frequency resource to the 4th frequency resource On.

It is readily conceivable that above step S502, S503, S505 and S506 can be carried out in succession, can also carry out parallel.

Fig. 6 is shown a case that when data flow is 2.It is assumed that pilot tone is in each subframe of lte-a system, occupy the 6th, 12 in the Physical Resource Block of 7 OFDM symbols and 13,14 OFDM symbols (Physical Resource Block, PRB) Subcarrier (Resource Element, RE).The 1st layer of PRB identical with the 2nd layer of pilot tone occupancy, by length be 2 it is orthogonal Mask is distinguished.

In this case, after pilot tone unrelated sequence (such as a, b, c) is generated, with the first orthogonal mask group pair Pilot tone unrelated sequence, will be mapped in for the first group data stream (data flow of first layer and the second layer) the 1st son carry Element (such as a) on ripple is spread, with the second orthogonal mask group to that will be mapped in the 6th subcarrier (and for first group The subcarrier of data flow) on, pilot tone spread with the element (such as b) of unrelated sequence, with the first orthogonal mask group pair Element (the example of the pilot tone unrelated sequence of (and subcarrier for the first group data stream) will be mapped on the 11st subcarrier As c) spread.Then mapped.

Here the first orthogonal mask group and the second orthogonal mask group are the mask sets of mutual row mirror image, that is, constitute orthogonal cover Code character pair.

Here, although for example shown subcarrier of the 1st, 6 and 11 is not physically adjacent, since they are used for For the pilot tone of same data stream, thus they are adjacent for same data stream this point, referred to as described The side frequency resource of one group data stream.

Fig. 7 show a case that when data flow be 4 when, it is assumed that pilot tone in each subframe of lte-a system, occupy the 6th, 24 in the Physical Resource Block of 7 OFDM symbols and 13,14 OFDM symbols (Physical Resource Block, PRB) Subcarrier (Resource Element, RE).The 1st layer of PRB identical with the 2nd layer of pilot tone occupancy, by length be 2 it is orthogonal Mask is distinguished.The 3rd layer of PRB identical with the 4th layer of pilot tone occupancy is distinguished by the orthogonal mask that length is 2.

In this case, after the unrelated sequence of pilot tone is generated, with the first orthogonal mask group (such as C₁) right Pilot tone is spread with the element that will be mapped on the 0th subcarrier for first layer and the second layer of unrelated sequence, with the Two orthogonal mask groups (such as C₂) the 5th subcarrier for being directed to first layer and the second layer will be mapped in pilot tone unrelated sequence On element spread, with the first orthogonal mask group will be mapped in for first layer and second to pilot tone unrelated sequence Element on 10th subcarrier of layer is spread.With the 3rd orthogonal mask group (such as C₃) pilot tone is incited somebody to action with unrelated sequence It is mapped in and is spread for the element in third layer and the 4th layer of the 1st subcarrier, with the 4th orthogonal mask group (such as C₄) To being spread for third layer and the 4th layer of element on the 6th subcarrier be mapped in unrelated sequence to pilot tone, used 3rd orthogonal mask group will be mapped in pilot tone unrelated sequence for member in third layer and the 4th layer of the 11st subcarrier Element spread.Then mapped.

Here the first orthogonal mask group and the second orthogonal mask group are the mask sets of mutual row mirror image, that is, constitute orthogonal cover Code character pair.Here the 3rd orthogonal mask group and the 4th orthogonal mask group are the mask sets of mutual row mirror image, that is, are also constituted orthogonal Mask set pair.It can be distinguished for 1,2 layer and 3,4 layers distinguish using the form of FDM with frequency.

It should be noted that here the first orthogonal mask group and the second orthogonal mask group composition orthogonal mask group to can with by 3rd orthogonal mask group and the orthogonal mask group of the 4th orthogonal mask group composition, can not also be same to identical.

When data flow be more than 4 when, can also by with it is shown in Fig. 7 in a manner of similar mode carry out.Pilot tone will be carried Frequency resource is divided into two groups for different data streams, and every group respectively with different orthogonal mask groups to will be mapped on them Pilot tone is spread with the element of irrelevant code.It is distinguished between different groups by frequency.

Such as equally under pilot resources pattern shown in Fig. 7, after the unrelated sequence of pilot tone is generated, with One orthogonal mask group the element being mapped on the 0th subcarrier for 1-4 layers being expanded with unrelated sequence to pilot tone Frequently, with the second orthogonal mask group to the member that will be mapped on the 5th subcarrier for 1-4 layers of pilot tone unrelated sequence Element is spread, and the 10th son that 1-4 layers are directed to being mapped in of pilot tone unrelated sequence is carried with the first orthogonal mask group Element on ripple is spread.Pilot tone unrelated sequence will be mapped in for 5-8 layers with the 3rd orthogonal mask group Element on 1st subcarrier is spread, with the 4th orthogonal mask group will be mapped in for pilot tone unrelated sequence Element on 5-8 layers of the 6th subcarrier is spread, with the 3rd orthogonal mask group will map to pilot tone unrelated sequence Element on the 11st subcarrier for 5-8 layers is spread.Then mapped.

Here the first orthogonal mask group and the second orthogonal mask group are the mask sets of mutual row mirror image, that is, constitute orthogonal cover Code character pair.Here the 3rd orthogonal mask group and the 4th orthogonal mask group are the mask sets of mutual row mirror image, that is, are also constituted orthogonal Mask set pair.It can be distinguished for 1-4 layers and 5-8 layers distinguish using the form of FDM with frequency.At this moment, it is orthogonal The length of mask should be 4.

It should be noted in this case that orthogonal the covering of the first orthogonal mask group and the second orthogonal mask group composition here Code character, can not also to can be with the orthogonal mask group being made of the 3rd orthogonal mask group and the 4th orthogonal mask group to identical Together.But preferably, had using row number and distinguish orthogonal mask group to group.This inner layer 1-4 constitutes the first group data stream, layer 5-8 Constitute the second group data stream.But this is exemplary, such as the first group data stream can be 1,2,5,6 layer of data flow.The Two group data streams can be the 3rd, 4,7,8 layer of data flow.

As can be seen from Figures 6 and 7, orthogonal mask sequence is spread in time domain, i.e., the the 6th, 7,13,14 OFDM symbol The corresponding DMRS of upper same sub-carrier forms the spreading code that length is 4.Meanwhile the kth in the 6th, 7,13 and 14 OFDM symbol It is a, on+6 subcarrier of kth corresponding DMRS also form length be 4 spreading code, i.e., provide orthogonality in time-frequency two-dimensional.

Fig. 8 show according to embodiment of the present invention generation 4 groups of orthogonal mask sequences (row number have distinguish orthogonal mask group To group) the power distribution schematic diagram on the 1st transmission antenna is mapped to after precoding.If it can be seen from the figure that precoding Row vector is complete 1 in matrix, then 4 groups of orthogonal mask sequence matrix C₁~C₄Column vector respectively with the pre-coding matrix row to Amount is multiplied after addition, and on k-th of subcarrier, corresponding DMRS is respectively 4a in the 6th, 7,13,14 OFDM symbol, and 0,0,0；The On k+1 subcarrier, corresponding DMRS is respectively 0,0,4c in the 6th, 7,13,14 OFDM symbol, and 0；+ 6 subcarriers of kth On, corresponding DMRS is respectively 0,0,0,4d in the 6th, 7,13,14 OFDM symbol；On+7 subcarriers of kth, the 6th, 7,13, Corresponding DMRS is respectively 0,4b, 0,0 in 14 OFDM symbols.It is not difficult to find out, the power of DMRS is evenly distributed on 4 OFDM symbols On number, unbalanced power problem is avoided.

A kind of embodiment according to the invention, as shown in Figure 9, Figure 10, for adjacent resource block (such as Fig. 9, Figure 10 Secondary resource block), the mode identical with former resource block (such as first resource block of Fig. 9, Figure 10) may be employed and be demodulated Reference signal generates, while between making Secondary resource block, for the side frequency resource of same data stream, the application it is orthogonal Mask set mutually row mirror image forms orthogonal mask group pair.For example, it as shown in Figure 10, is carried for the 10th son of first resource block 0th subcarrier of ripple and Secondary resource block, using orthogonal mask the group C1 and C2 of row mirror image each other, for the of first resource block 1st subcarrier of 11 subcarriers and Secondary resource block, using orthogonal mask the group C3 and C4 of row mirror image each other.In another example such as Fig. 9 It is shown, for the 11st subcarrier of first resource block and the 1st subcarrier of Secondary resource block, covered using the orthogonal of row mirror image each other Code character C1 and C2.

It will be noted that as shown in Figure 9 and Figure 10, first frequency resource and second frequency resource can in different resource blocks To refer to different subcarriers.

Another embodiment according to the invention, as is illustrated by figs. 11 and 12, for adjacent resource block, using each other Two groups of orthogonal mask groups of row mirror image.As shown in figure 11, in Secondary resource block, pair with former resource frequency resource (example in the block As first resource is in the block 1st, 6,11 subcarriers) corresponding frequency resource (such as Secondary resource the 1st, 6,11 son in the block Carrier wave) apply different orthogonal mask groups pair.Preferably, this two groups of orthogonal mask groups have differentiation orthogonal mask to foring row number Group is to group.In another example as shown in figure 12, in Secondary resource block, pair provided with the former corresponding frequency of resource frequency resource in the block Apply different orthogonal mask groups pair in source.The orthogonal mask group applied in adjacent resource block has differentiation to also constituting row number Orthogonal mask group is to group.It is logical to an orthogonal mask group in group that row number applied to Secondary resource block, which has differentiation orthogonal mask group, It crosses to have the row number for being applied to first resource block and distinguishes orthogonal mask group to orthogonal mask group progress cycling of column vector in group Mobile acquisition.

As shown in figure 13, include basic orthogonal code acquiring unit 1301 according to orthogonal mask group generating means of the present invention, reflect As unit 1302, row cycle shift unit 1303 and group are to group acquiring unit 1304.

Basic orthogonal code acquisition device 1301 for obtain one group of basis orthogonal code, such as foregoing walsh codes or DFT codes.

The basic orthogonal code that row cycle shift unit 1303 is used to generate basic orthogonal code acquisition device 1301 carries out Column vector cyclic shift.The displacement of column vector cyclic shift can change.

Unit map 1302 is used for the basic orthogonal code that basic orthogonal code acquisition device 1301 is generated into ranks image, So as to obtain first pair of orthogonal mask group pair, and for orthogonal to the basis after 1303 row cyclic shift of row cycle shift unit Code is into ranks image, and so as to obtain second pair, the 3rd pair or more to orthogonal mask group pair.

Group is used to control row cycle shift unit 1303 and unit map 1302 to group acquiring unit 1304, from And there is differentiation orthogonal mask group to group according to row number is obtained.

It should be noted that in specific applications, group can be omitted group acquiring unit 1304.

In certain circumstances, row cycle shift unit 1303 can also be omitted.

All modules, unit, subelement can pass through software, firmware, hardware or the side of its combination in above device Formula is configured.Specific means workable for configuration or mode are well known to those skilled in the art, and details are not described herein.Logical It crosses in the case that software or firmware realize, (such as is incorporated to from storage medium or network to the computer with specialized hardware structure The all-purpose computer shown in special purpose computer or Figure 14 in transmitter or receiver) program for forming the software, the meter are installed Calculation machine is able to carry out various functions etc. when being equipped with various programs.

In fig. 14, central processing unit (CPU) 1401 according to the program stored in read-only memory (ROM) 1402 or from The program that storage part 1408 is loaded into random access memory (RAM) 1403 performs various processing.In RAM1403, root is gone back According to needing to store the required data when CPU 1401 performs various processing etc..CPU 1401, ROM 1402 and RAM 1403 It is connected to each other via bus 1404.Input/output interface 1405 is also connected to bus 1404.

Components described below is connected to input/output interface 1405：Importation 1406 (including keyboard, mouse etc.), output Part 1407 (including display, such as cathode-ray tube (CRT), liquid crystal display (LCD) etc. and loud speaker etc.), storage part Divide 1408 (including hard disks etc.), communications portion 1409 (including network interface card such as LAN card, modem etc.).Communication unit 1409 are divided to perform communication process via network such as internet.As needed, driver 1410 can be connected to input/output and connect Mouth 1405.Detachable media 1411 such as disk, CD, magneto-optic disk, semiconductor memory etc. can be mounted as needed On driver 1410 so that the computer program read out is mounted to as needed in storage part 1408.

It is such as removable from network such as internet or storage medium in the case where realizing above-mentioned series of processes by software Unload the program that the installation of medium 1411 forms software.

It will be understood by those of skill in the art that this storage medium is not limited to wherein be stored with journey shown in Figure 14 Sequence separately distributes the detachable media 1411 for providing a user program with equipment.The example bag of detachable media 1411 Containing disk (include floppy disk (registered trademark)), CD (including compact disc read-only memory (CD-ROM) and digital versatile disc (DVD)), Magneto-optic disk (including mini-disk (MD) (registered trademark)) and semiconductor memory.Alternatively, storage medium can be ROM 1402, deposit Hard disk included in storage part 1408 etc., wherein computer program stored, and user is distributed to together with the equipment comprising them.

The present invention also proposes a kind of program product for the instruction code for being stored with machine-readable.Described instruction code is by machine When device reads and performs, can perform it is above-mentioned according to the method for the embodiment of the present invention.

Correspondingly, also wrapped for carrying the storage medium of the program product of the above-mentioned instruction code for being stored with machine-readable It includes in disclosure of the invention.The storage medium includes but not limited to floppy disk, CD, magneto-optic disk, storage card, memory stick etc. Deng.

Figure 15 shows the signal sexual function of the transmitter of the demodulated reference signal generating means and method using the present invention Block diagram.It is omitted in the block diagram and to understanding that technical scheme relation is not very big power supply, storage unit, data life Into module etc..

As shown in figure 15, data carry out channel coding at channel encoding unit 1501, then at modulation unit 1502 Be modulated, it is modulated after data resource impact is carried out at resource mapping unit 1503.At the same time, generated in DRMS single DRMS is generated using the demodulated reference signal generating means or method of the present invention and mapped at member 1506.It will be noted that In the above description, demodulated reference signal generating means also have map unit, the map unit and resource mapping unit 1503 actually one, i.e. data map simultaneously with DRMS.Then, data on the physical channel are mapped in precoding list Precoding is subjected at member 1504, and receives OFDM modulation to the greatest extent at OFDM modulation units 1505, is then sent through antenna.

Description of the invention provides for the sake of example and description, and is not exhaustively or by the present invention It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches It states embodiment and is to more preferably illustrate the principle of the present invention and practical application, and those of ordinary skill in the art is enable to manage The present invention is solved so as to design the various embodiments with various modifications suitable for special-purpose.

Claims

1. a kind of transmitter, the transmitter includes demodulated reference signal maker, and the demodulated reference signal maker includes：

Unrelated sequence maker, for generating the demodulated reference signal unrelated sequence for first resource block；

First spectrum-spreading unit, for utilizing first group of orthogonal mask to the demodulated reference signal for first resource block with non- The element of the first frequency resource that will be mapped to the first resource block in correlated series is spread；

Second spectrum-spreading unit, for utilizing second group of orthogonal mask to the demodulated reference signal for first resource block with non- The element of the second frequency resource that will be mapped to the first resource block in correlated series is spread；The second frequency money Source is in the frequency resource elements sent in the first resource block for demodulated reference signal with the first frequency resource For the side frequency resource of the first group data stream, second group of orthogonal mask and first group of orthogonal mask row mirror each other Picture；

3rd spectrum-spreading unit, for utilizing the 3rd group of orthogonal mask to the demodulated reference signal for first resource block with non- The element of the 3rd frequency resource that will be mapped to the first resource block in correlated series is spread；

4th spectrum-spreading unit, for utilizing the 4th group of orthogonal mask to the demodulated reference signal for first resource block with non- The element of the 4th frequency resource that will be mapped to the first resource block in correlated series is spread；The 3rd frequency money Source is pin in the frequency resource elements sent in the first resource block for demodulated reference signal with the 4th frequency resource To the side frequency resource of the second group data stream, the 3rd group of orthogonal mask and the 4th group of orthogonal mask row mirror each other Picture, the 3rd frequency resource and the first frequency resource are physically adjacent, and the 4th frequency resource and described Two frequency resources are physically adjacent or the 3rd frequency resource and the second frequency resource it is physically adjacent, and 4th frequency resource and the first frequency resource are physically adjacent；And

Map unit, for by the element after first spectrum-spreading unit is spread and after second spectrum-spreading unit spread spectrum Element is respectively mapped in the first frequency resource and the second frequency resource of the first resource block, will be through described Element after three spectrum-spreading units spread spectrum and the element after the 4th spectrum-spreading unit spread spectrum are respectively mapped to the first resource In the 3rd frequency resource of block and the 4th frequency resource,

Also, one group in the 4th group of orthogonal mask and the 3rd group of orthogonal mask is by orthogonal to described first group One group of carry out column vector cyclic shift formation in mask and second group of orthogonal mask, and identical column vector is in institute It states in first group of orthogonal mask, second group of orthogonal mask, the 3rd group of orthogonal mask and the 4th group of orthogonal mask Row sequence number it is different.

2. a kind of communication system, the communication system includes：

Transmitter is used to emit demodulated reference signal；And

Terminal is received, is used to receive the demodulated reference signal；

Wherein, the transmitter includes demodulated reference signal maker, and the demodulated reference signal maker includes：