CN101534268A - Codebook design and feedback method for pre-coding of multi-input and multi-output system - Google Patents
Codebook design and feedback method for pre-coding of multi-input and multi-output system Download PDFInfo
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Abstract
A codebook design and a feedback method for pre-coding of a multi-input and multi-output system relate to the emitter and receiver of an MIMO system. The method comprises the following steps of: a) designing layered upwards compatible codebook, namely carrying out layered quantification processing to the codebook according to the feedback expense requirement of the codebook, also namely grouping the codebook by layers; wherein each layer comprises a plurality of groups; each group comprises a plurality of codebooks and the first element of the lower layer of the codebook is the value of the upper layer of the codebook under the quantification situation; b) calculating the index of the feedback codebook and selecting the codebook feedback type to feed back the index of the codebook by the receiver; c) calculating the codebook weights by the emitter according to the codebook feedback type. Under the situation of no increasing system expense, the invention obtains exact channel information by the combination of previous and next feedback information. When the channel changes quickly, the method can be degenerated as the design of single layer codebook, thus ensuring the effectiveness of the feedback channel information.
Description
Technical field
The present invention relates to multiple-input and multiple-output (MIMO, Multi-Input Multi-Output) system coding method in the wireless communication field, relate in particular to the code book method for designing of precoding in the mimo system (Precoding).
Background technology
Precoding technique is the channel information by recipient's feedback, the data that send are handled with pre-coding matrix, the equivalence in the space channel transmission course of each data flow is transmitted for separate channel, can enough be obtained channel information but prerequisite is emission.In the practical design, Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplex) in the system or time division duplex (TDD, Time Division Duplex) in the system under the channel heterogeneite failure conditions, channel information needs to obtain by feedback usually, and the feedback of channel information expense is a problem must considering in the system design.Therefore prior art all is to handle by the mode of code book, warp is by quantizing the possible situation of channel, and remove to mate a most approaching code book with the decomposition amount of current channel, and feed back the sequence number of this code book, but in fact, if make code book travel through all the most basic channel possibilities, still need very big feedback overhead.The channel parameter of for example supposing every antenna only is quantified as 4 kinds of values, if each channel is independent, and independent between the stream, suppose that number of transmit antennas is m, the number of data streams of using is k, then will have (4)
M*kIndividual code book.Although this quantification is very coarse, it is very big that required expense remains.
Formed a pair of contradiction to the restriction of channel feedback expense with to the requirement of channel feedback information accuracy.Therefore, how under the situation of restriction expense, the precision that improves the feedback code book is a difficult problem of current research.Existing code book method for designing under the situation of restriction expense, is difficult to guarantee the accuracy of feedback code book.The thought of code book layering is by designing the code book on several different levels, and makes up by the code book on the different levels and to reach the effect that improves feedback accuracy, under the situation of same feedback overhead, makes code book obtain higher precision to the quantification of channel.
Summary of the invention
Technical problem to be solved by this invention provides a kind of code book design and feedback method of multiple-input multiple-output system precoding, can under the situation that does not increase the system feedback expense, improve the accuracy of feedback code book, and can be compatible mutually with existing code book method for designing.
In order to solve the problems of the technologies described above, the invention provides a kind of code book design and feedback method of multiple-input multiple-output system precoding, relate to the signal emission side and the receiving side signal of multi-input multi-output system, this method step is:
(a) the upward compatible layering code book of design, feedback overhead according to code book requires code book is carried out the layered quantization processing, also be about to code book by layer grouping, each layer comprises a plurality of groups, each group comprises a plurality of code books, and first element of following one deck code book is the value under the last layer codebook quantification situation;
(b) receiving side signal calculates the index of feedback code book, and selects the index of code book feedback system feedback code book.
Further, it is n bit that step (a) is established feedback overhead, and the layering number of code book is k, promptly divides into groups according to level ground by layer grouping: ground floor general (2
n)
kIndividual code book is divided into 2n group, and every group comprises (2
n)
K-1Individual code book; The second layer continues every group (2
n)
K-1Individual code book is divided into 2
nIndividual group ..., the code book number in every group of k layer is 2
n
Further, step (a) is for the design to the hierarchical code book, and the code book of following one deck has the status that equates with last layer, and different layers is represented the different components of code book; For the design of asymmetrical layering code book, following one deck code book is the further quantification to the last layer quantization error.
Further, step (b) code book feedback system comprises following one or more:
(1) code book of interleaved mode feedback is applicable to the feedback to the hierarchical code book, also is about to the multilayer code book according to time slot interleaving ground poll feedback, i.e. current time slots feedback ground floor code book, then one deck code book under next time slot feeds back successively; The code book of different layers has equal reliability requirement;
(2) according to different reliability requirements code book is fed back, be applicable to the feedback of asymmetrical layering code book, the code book that also is about to the highest layer of reliability requirement feeds back by control channel, and the code book of the lower layer of other reliability requirement is fed back by data channel;
(3) the code book feedback of bound fraction feedback and related operation mode, that is receiving-transmitting sides obtains final precoding weighted value code book with the code book of feedback layer and the code book of the local non-feedback layer of storing by functional operation in conjunction with the relation between the different layers code book.
Further, code book feedback system (3) comprises one or both of following mode:
(3A) each only feedback one deck code book wherein be used for the code book that preserve this locality is revised, and the ground floor code book is used for local code book is carried out initialization;
When (3B) feeding back code book, represent that with a bit current code book is that the last layer code book is revised or changed at every turn, represent to be used to the index of the code book revising or change with remaining bit; The last layer code book is revised, be meant that feedback ratio works as the more code book of low layer of anterior layer, more the code book of low layer is to the refinement of preceding one deck code book or to the correction of preceding one deck code book; The last layer code book is changed, be meant when code book changes greatly before and after next time slot signal recipient finds, no longer last layer is carried out refinement or correction, and reselect a code book from last layer.
Further, if adopt code book feedback system (1), then described method also comprises step:
(b1) according to the level number i of the index correspondence of the code book of last time feedback, calculate the current level number mod[(i+1 that should feed back), k], mod[wherein] and be mod, described k is the layering number of code book;
(b2) according to the decomposition value of the channel of current time slots, and, extract component, and the index that mates a most approaching code book correspondence feeds back when the anterior layer correspondence in conjunction with last feedback result.
Further, if adopt code book feedback system (2), then described method also comprises step:
(b1) channel according to current time slots decomposes, and obtains channel weights component, and mates with channel weights component and ground floor code book, obtains the index of time slot ground floor code book;
(b2) calculate the decomposition amount of the mean value correspondence of channel in each Resource Block RB scope respectively, the quantization error coupling of the code book that the decomposition amount that calculating obtains is corresponding with the ground floor code book index, and further quantized value and other layer code book of quantization error mated, obtain the index of other layer code book among each RB;
(b3) code book index with ground floor places control channel to transmit, and places reverse link traffic channel to transmit respectively the index of other layer code book among each RB.
Further, if coherence time and the feedback cycle of the channel that obtains of statistics are suitable, then only calculate the ground floor code book, and the index corresponding with first code book during each is organized mate respectively, receiving side signal only feeds back the index of ground floor code book at every turn; If the coherence time of the channel that obtains of statistics is much larger than feedback cycle, then feed back according to code book feedback system (1) or mode (2) or mode (3).
Further, described method comprises that also step (c) signal emission root calculates the code book weights according to the code book feedback system.
Further, if receiving side signal adopts the code book feedback of interleaved mode, then the code book weights are calculated and comprise step:
(c1) obtain the code book weights of current time slots and the code book weights of last time slot according to the code book index of current time slots feedback and the code book index of last time slot feedback respectively;
(c2) the code book weights of combination current time slots and the code book weights of last time slot obtain final code book weighing vector.
Further, the mode of code book feedback is carried out the code book feedback, then the code book weights is calculated and comprise step if receiving side signal adopts according to different reliability requirements:
(c1) obtain the code book of this layer by the code book index of understanding this layer from control channel;
(c2), obtain other layer code book of each RB according to the code book index of each RB;
(c3) with the code book of each RB described layer code book handled, obtained the code book of each other layer of RB and calculate weighing vector.
The present invention is based on the design philosophy of code book layering, proposed a kind of can with the layering code book method for designing of individual layer code book compatibility, and provide multiple code book feedback scheme.Can be under the situation that does not increase the system feedback expense, the combination by twice feedback information in front and back obtains precise channels information.Be far longer than in the channel variation cycle under the situation of feedback cycle, especially under the lower situation of UE speed, because the coherence time of channel is longer, channel variation is slower in twice feedback time in front and back.Can improve the channel information precision largely by the layering feedback.And under the channel variation cycle situation suitable with feedback cycle, this method can degenerate into the design of individual layer code book again, guarantees the validity of feedback channel information.The technical characterstic of layering code book design of the present invention and code book feedback can be applicable to mainly that usually UE low speed situation matches with precoding technique.
Description of drawings
Fig. 1 is of the present invention and layering code book design diagram individual layer code book compatibility;
Fig. 2 is the principle schematic of the staggered feedback of layering code book of the present invention;
Fig. 3 is the schematic diagram of layering code book layering feedback of the present invention;
Fig. 4 obtains weights method schematic diagram for bound fraction feedback of the present invention with a layer computing;
Fig. 5 is the code book design and the feedback method flow chart of mimo system precoding of the present invention.
Embodiment
The code book design and the feedback method of a kind of multiple-input multiple-output system precoding provided by the invention, comprise step:, design the layering code book of the different schemes of upward-compatible (being the design that layering code book design can compatible individual layer code book) based on the design philosophy of code book layering; Receiving side signal calculates the index of feedback code book, and according to the index of the feedback system feedback code book of the layering codebook selecting layering code book of different schemes; The signal emission root number of it is believed that recipient's code book feedback system is calculated the code book weights.
Below in conjunction with embodiment and accompanying drawing, technique scheme of the present invention is described in detail.
As shown in Figure 1, code book is carried out hierarchical design, represent main code book with ground floor, identical with existing individual layer code book design, other layer is the code book according to different reference values designs of proofreading and correct code book or having identical status, and other layer is inserted between the ground floor code book.Be the code book of the corresponding one group of different layers of each code book of ground floor, when code book sequence number value only is first of every group, then is individual layer code book situation, otherwise is multilayer code book design conditions.
2 layers of code book situation for example, establishing feedback overhead is n bit, is 2 with codebook quantification
nGroup, every group comprises 2 simultaneously
nIndividual code book then can obtain 2 after two groups of combinations
2nIndividual code book.The 1st code book in each code book group is main code book, when two layers of code book feeding back unsuccessful or when not feeding back, is weighted with this main code book.Therefore the method for designing of above-mentioned layering code book can be compatible with the code book method for designing under the not stratified situation.
Because the code book layering has the difference to hierarchical and asymmetrical layering, also have by combination and obtain the code book of actual needs and feedback layer code book and non-feedback layer code book are obtained the branch of the code book of actual needs by functional operation the multilayer code book, therefore, at the design of above-mentioned layering code book, the present invention has provided the feedback system of following several layering code books.
Mode 1: at the code book intersection feedback method of identical level reliability requirement
Particularly as shown in Figure 2, with two-layer code book poll feedback alternately, if promptly current feedback be the ground floor code book, then feed back second layer code book at next time slot.Because the feedback status of two-layer code book is reciprocity, therefore this feedback mechanism is suitable for the code book method for designing to the hierarchical code book.
What is called is meant that to the hierarchical code book code book of two aspects has equal reliability requirement, and the emission square tube is crossed the code book that the combination of two-layer code book is obtained actual needs.For example, code book is divided into reciprocity two groups, represents ground floor for first group, represent the second layer for second group; Perhaps the ground floor code book is used for feedback quantization result's real part, and second layer code book is used for feedback quantization result's imaginary part.
Fig. 2 supposes that the number of plies is 2, and the recipient is in the code book information of different feedback time slot interleaving ground feedback layer 1 and layer 2.Emission side utilizes the index of the two-layer code book of preceding twice feedback to determine the combination of code book information, constructs the weights that current transmission time interval (TTI, Transmit Time Interval) is used.
Mode 2: the code book at the different levels reliability requirement feeds back at different channels
Particularly as shown in Figure 3, if the layering code book is designed to the k layer, the layer that reliability requirement is the highest is by the control signaling feedback of control channel, because the transmission precision of control signaling is higher, can guarantee the reliability of this layer code book transmission, guarantee the basic transfer function of channel; Other to reliability requirement lower the layer code book in data channel transmission.Because this code book feedback mechanism is to the feedback reliability difference of different layers code book, therefore this scheme is more suitable for the method for designing of asymmetrical layering code book.
So-called asymmetrical layering code book design is meant that the code book importance of two aspects of design there are differences concerning system, system is also different to its reliability requirement, and the design of other layer code book is in order to improve the precision of ground floor code book.
Fig. 3 supposes that still the number of plies is 2, and second layer code book is the thin quantification to ground floor codebook quantification error, and this moment is still all meticulous than ground floor code book in the granularity of frequency domain in time domain.For example, that the ground floor code book reflects is a plurality of Resource Block (RB in the TTI, the decomposition amount of average channel information Resource Block), and the deviation of the relative average channel H decomposition amount of each RB in the second layer code book reflection TTI, be more suitable for adopting this feedback scheme to feed back this moment.I_1 represents ground floor code book feedback index among the figure, and it is positioned at control channel or other transmission reliability is had relatively high expectations and resource is more limited channel.II_1, II_2 ... be respectively the second layer code book index (weight vector that each RB calculates is the further quantized value of the quantization error of the code book corresponding with I_1) in the different RB.The recipient by the weights with the second layer code book index correspondence ground floor code book is rotated poll accordingly or other is handled, and improves the precision of feedback code book information.
Mode 3: bound fraction feedback and related operation feed back code book
Particularly as shown in Figure 4, the recipient only feeds back the one deck wherein (not necessarily ground floor) in which floor code book, receiving-transmitting sides is in conjunction with the relation between the different layers code book, the code book A of feedback layer and the code book B of the local non-feedback layer of storing are passed through a concrete function F (A, B) computing obtains final precoding weighted value code book B ' (such as B '=A * B, perhaps B '=a * A ± B or the like).
Be illustrated in figure 5 as the code book method for designing of mimo system precoding of the present invention, may further comprise the steps:
Step 510: the layering code book that designs upward compatible different schemes;
At first require to carry out codebook quantification according to the feedback overhead of code book, establishing feedback overhead is n bit, and the code book number of plies is k, designs 2
Kn=(2
n)
kIndividual code book, ground floor is divided into 2 with code book
nIndividual group, every group comprises (2
n)
K-1Individual code book; The code book that the second layer continues every group divides into groups, and every group comprises (2
n)
K-2Individual code book; ... the code book number in every group of the bottom (k layer) is 2
nWherein following principle is satisfied in the quantification of code book:
(1) for the design of asymmetrical layering code book, following one deck code book is the quantification to the last layer quantization error, and down first element of one deck (i layer) code book is a value (this principle be for individual layer or k-1 layer code book compatibility) under last layer (i-1 layer) the codebook quantification situation;
(2) for the design to the hierarchical code book, the code book of following one deck has the status that equates with last layer, and different layers is represented the different components of code book.This moment, first element of following one deck (i layer) code book was the value under last layer (i-1 layer) the codebook quantification situation in order to take into account the compatibility with the individual layer code book.
Step 520: the recipient calculates the index of feedback code book, and according to different designs Scheme Choice different modes feedback code book;
(1) if adopt interleaved mode to carry out the code book feedback, judges the level number of the code book index correspondence of last feedback, be assumed to be i, and the code book number of plies is k, utilize mod mod () to calculate the current level number mod[(i+1 that should feed back), k]; According to the decomposition value of the channel H of current time slots, and, extract component, and the index that mates a most approaching code book correspondence feeds back when the anterior layer correspondence in conjunction with former feedback result.
If coherence time and the feedback cycle of the channel variation that obtains of statistics are suitable, then only calculate one deck code book, and the index corresponding with first code book during each is organized mate respectively, the recipient only feeds back the index of ground floor code book at every turn.
(2) if employing is fed back code book according to different reliability requirements, then carry out according to following step:
A, decompose, obtain channel weights component, and with channel weights component and ground floor code book coupling, obtain the index of this time slot ground floor code book according to the channel H of current time slots;
B, each RB calculate the decomposition amount of the mean value correspondence of channel H in the RB scope respectively, the error coupling of the code book that the decomposition amount that calculating obtains is corresponding with the ground floor code book index, and, obtain other layer code book index among each RB with the further quantized value of described quantization error and other layer code book coupling;
C, the code book index of ground floor is placed on control channel transmits, the subcarrier that other layer code book that each RB coupling is obtained is placed on the Traffic Channel of the corresponding RB of up channel respectively transmits.
(3) if adopt bound fraction feedback and related operation that code book is fed back, then can carry out in the following ways respectively:
(3A) only feed back wherein that one deck code book is used for the code book that preserve this locality is revised, and the ground floor code book is used for local code book is carried out initialization at every turn.
When (3B) feeding back, represent that with a bit current code book is that the last layer code book is revised or changed at every turn, represent to be used to the index of the code book revising or change with remaining bit.
So-called correction to the last layer code book is meant that feedback ratio works as the more code book of low layer of anterior layer, this more the code book of low layer be the refinement of preceding one deck code book or be used for correction preceding one deck code book.The so-called code book of changing is meant before and after next time slot recipient finds and under the code book variation situation greatly, no longer last layer is carried out refinement or correction, but reselect a code book from last layer.
Step 530: the emission root calculates the code book weights according to recipient's code book feedback system.
(1) if the recipient adopts interleaved mode to carry out the code book feedback, then carry out according to following step:
A1, obtain the code book weights of current time slots and the code book weights of last time slot according to the code book index of current time slots feedback and the code book index of last time slot feedback respectively;
B1, twice weights of combination obtain final code book weighing vector.
If channel variation is very fast, then only use first weights in the code book group of code book index correspondence of current feedback as weighing vector.
(2) if the recipient adopts to feed back code book according to different reliability requirements, then carry out according to following step:
A2, at first separate the code book index of reading one deck, and obtain its code book from control channel;
B2, according to the code book index of each RB, obtain two layers of code book of each RB;
C2, one deck code book is handled, obtained the final code book weighing vector of each RB with two layers of code book of each RB.
The present invention is based on the design philosophy of code book layering, proposed a kind of can with the layering code book method for designing of individual layer code book compatibility, and two kinds of code book feedback schemes are provided, can be under the situation that does not increase the system feedback expense, the combination by the front and back feedback information or feedback information and non-feedback information are carried out computing obtain precise channels information.Be far longer than in the channel variation cycle under the situation of feedback cycle, can improve the channel information precision largely by the layering feedback.And under the channel variation cycle situation suitable with feedback cycle, this method can be changed into the design of individual layer code book again, guarantees the validity of feedback channel information.For example: the channel H that supposes each antenna is according to 4 quantized value analyses, at this moment from the quadrantal diagram analysis, can think that this is a most coarse a kind of quantification granularity, nonetheless can produce 256 code books altogether under 4 antenna single current situations, and require to analyze according to the 4-bit feedback overhead, common individual layer codebook design schemes only designs 16 code books, and it is very big being very easy to find its quantization error of the latter.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (11)
1, a kind of code book of multiple-input multiple-output system precoding designs and feedback method, relates to the signal emission side and the receiving side signal of described multi-input multi-output system, it is characterized in that described method step is:
(a) the upward compatible layering code book of design, feedback overhead according to code book requires described code book is carried out the layered quantization processing, also being about to described code book divides into groups by layer, each layer comprises a plurality of groups, each group comprises a plurality of code books, and first element of following one deck code book is the value under the last layer codebook quantification situation;
(b) described receiving side signal calculates the index of feedback code book, and selects the code book feedback system to feed back the index of described code book.
2, in accordance with the method for claim 1, it is characterized in that it is n bit that step (a) is established described feedback overhead, and the layering number of described code book is k, describedly promptly divides into groups: ground floor general (2 according to level ground by layer grouping
n)
kIndividual code book is divided into 2
nIndividual group, every group comprises (2
n)
K-1Individual code book; The second layer continues every group described (2
n)
K-1Individual code book is divided into 2
nIndividual group ..., the code book number in every group of k layer is 2
n
3, in accordance with the method for claim 2, it is characterized in that step (a) is for the design to the hierarchical code book, the described code book of one deck down has the status that equates with described last layer, the different components of the described code book of different described layer expression; For the design of asymmetrical layering code book, described one deck code book down is the further quantification to the last layer quantization error.
According to each described method of claim 1 to 3, it is characterized in that 4, the described code book feedback system of step (b) comprises following one or more:
(1) code book of interleaved mode feedback is applicable to described feedback to the hierarchical code book, also is about to the multilayer code book according to time slot interleaving ground poll feedback, i.e. current time slots feedback ground floor code book, then one deck code book under next time slot feeds back successively; The described code book of different layers has equal reliability requirement;
(2) according to different reliability requirements code book is fed back, be applicable to the feedback of described asymmetrical layering code book, the code book that also is about to the highest described layer of reliability requirement feeds back by control channel, and described layer the code book lower to other reliability requirement feeds back by data channel;
(3) the code book feedback of bound fraction feedback and related operation mode, that is receiving-transmitting sides obtains final precoding weighted value code book with the code book of feedback layer and the code book of the local non-feedback layer of storing by functional operation in conjunction with the relation between the different layers code book.
5, in accordance with the method for claim 4, it is characterized in that described code book feedback system (3) further comprises one or both of following mode:
(3A) each only feedback one deck code book wherein be used for the code book that preserve this locality is revised, and the ground floor code book is used for local code book is carried out initialization;
When (3B) feeding back code book, represent that with a bit current code book is that the last layer code book is revised or changed at every turn, represent to be used for the index of the code book of described correction or described replacing with remaining bit; Described the last layer code book is revised, be meant that feedback ratio works as the more code book of low layer of anterior layer, the code book of described more low layer is to the refinement of preceding one deck code book or to the correction of preceding one deck code book; Described the last layer code book is changed, be meant when code book changes greatly before and after the described receiving side signal of next time slot is found, no longer last layer is carried out described refinement or described correction, and reselect a code book from last layer.
6, in accordance with the method for claim 4, it is characterized in that if adopt described code book feedback system (1), then described method also comprises step:
(b1) according to the level number i of the index correspondence of the described code book of last time feedback, calculate the current level number mod[(i+1 that should feed back), k], mod[wherein] and be mod, described k is the layering number of described code book;
(b2) according to the decomposition value of the channel of current time slots, and, extract component, and the index that mates a most approaching code book correspondence feeds back when the anterior layer correspondence in conjunction with last feedback result.
7, in accordance with the method for claim 4, it is characterized in that if adopt described code book feedback system (2), then described method also comprises step:
(b1) channel according to current time slots decomposes, and obtains described channel weights component, and mates with described channel weights component and ground floor code book, obtains the index of described time slot ground floor code book;
(b2) calculate the decomposition amount of the mean value correspondence of channel in each Resource Block RB scope respectively, the quantization error coupling of the code book that the described decomposition amount that calculating obtains is corresponding with the ground floor code book index, and further quantized value and other layer code book of described quantization error mated, obtain the index of other layer code book among described each RB;
(b3) code book index with described ground floor places described control channel to transmit, and places reverse link traffic channel to transmit respectively the index of other layer code book among described each RB.
8, in accordance with the method for claim 4, it is characterized in that, if the coherence time and the feedback cycle of the channel that statistics obtains are suitable, then only calculate the ground floor code book, and mate respectively with the corresponding index of first code book in each group, described receiving side signal only feeds back the index of described ground floor code book at every turn; If the coherence time of the channel that obtains of statistics is much larger than feedback cycle, then feed back according to described code book feedback system (1) or mode (2) or mode (3).
9, in accordance with the method for claim 1, it is characterized in that described method comprises that also the described signal emission of step (c) root calculates the code book weights according to described code book feedback system.
10, in accordance with the method for claim 9, it is characterized in that if described receiving side signal adopts the code book feedback of described interleaved mode, the then described code book weights are calculated comprises step:
(c1) obtain the code book weights of described current time slots and the code book weights of described last time slot according to the code book index of current time slots feedback and the code book index of last time slot feedback respectively;
(c2) the code book weights of the described current time slots of combination and the code book weights of described last time slot obtain final code book weighing vector.
11, in accordance with the method for claim 9, it is characterized in that if described receiving side signal adopts the described mode of code book being fed back according to different reliability requirements to carry out the code book feedback, the then described code book weights are calculated comprises step:
(c1) obtain described layer code book by the code book index of understanding described layer from control channel;
(c2), obtain other layer code book of each described RB according to the code book index of each described RB;
(c3) with the code book of each described RB described layer code book handled, obtained the code book of each described other layer of RB and calculate weighing vector.
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| WO2010069242A1 (en) * | 2008-12-15 | 2010-06-24 | Huawei Technologies Co., Ltd. | Method for employing six-bit rank 1 and 2 codebooks for four transmit antennas |
| CN101826945A (en) * | 2010-04-05 | 2010-09-08 | 中兴通讯股份有限公司 | Method and device for transmitting channel information |
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Family Cites Families (2)
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2008
- 2008-03-14 CN CN2008100847489A patent/CN101534268B/en active Active
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