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Method and apparatus for multi-antenna layered pre-encoding

A precoding and multi-antenna technology, applied in diversity/multi-antenna systems, space transmit diversity, prevention/detection of errors through diversity reception, etc., can solve the problems of command consumption, processing delay, and complicated calculation and selection process, and avoid The codebook calculation process and the effect of reducing complexity

Active Publication Date: 2013-01-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The calculation and selection process of the codebook W(i) is quite complicated, which requires at least one look-up table, one conjugate transposition operation of the matrix, two matrix multiplications, and one matrix and constant division (u n H u n The result is a constant), a series of operations such as matrix subtraction, and a column transformation, so that the process of multi-antenna layered precoding is quite expensive in the implementation of DSP (Digital Signal Processing, digital signal processing), resulting in processing delays; FPGA (Field Programmable Gate Array, Field Programmable Gate Array) implementation also consumes a lot of hardware resources

Method used

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  • Method and apparatus for multi-antenna layered pre-encoding
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  • Method and apparatus for multi-antenna layered pre-encoding

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Experimental program
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Embodiment 1

[0043] Pre-save the data related to the codebook of the data stream layered precoding in the transmitter of the MIMO system - the set of code table matrices, and then only need to look up the code table matrix corresponding to the data stream when performing hierarchical precoding without Calculate the code table matrix required in the precoding process again.

[0044] Such as figure 2 As shown, the multi-antenna layered precoding method provided by the embodiment of the present invention includes the following steps:

[0045] 21. Find the code table matrix corresponding to the data stream in the pre-saved code table matrix set according to the codebook number n of the data stream.

[0046] Wherein, the pre-saved code table matrix set is a 4×4 matrix W calculated by formula 3 n A collection of; for a 4-antenna MIMO system, the collection of possible data stream code table matrices is as follows:

[0047] W 0 = ...

Embodiment 2

[0060] Pre-save the data related to the codebook for hierarchical precoding of the data stream at the transmitting end of the MIMO system—the codebook set, and then only need to look up the codebook corresponding to the data stream when performing hierarchical precoding without recomputing The codebook required in the precoding process.

[0061] Such as image 3 As shown, the multi-antenna layered precoding method provided by the embodiment of the present invention includes the following steps:

[0062] 31. Find the codebook corresponding to the data stream in the pre-saved codebook set according to the codebook number n and the layer number v of the data stream.

[0063] Wherein, the pre-saved codebook set is obtained through the following process:

[0064] i) Calculate all possible data stream code table matrix W by formula 3 n (0≤n≤15), obtain altogether 16 4 * 4 matrices (with 16 code table matrices W in the embodiment one n are the same and will not be described in de...

Embodiment 3

[0076] If the codebook-related data stored in advance at the transmitting end of the MIMO system is a set of code table matrices, the multi-antenna layered precoding device provided by the embodiment of the present invention, such as Figure 5 As shown, it includes a determination unit 51, an encoding unit 52 and a calculation unit 53; wherein,

[0077] The determination unit 51 determines the codebook corresponding to the data stream according to the codebook number n and the layer number v of the data stream and the pre-saved code table matrix set, and then the encoding unit 52 performs precoding on the data stream in combination with the codebook .

[0078] Further, the determination unit 51 includes: a storage module 511, a search module 512, a selection module 513 and a division module 514;

[0079] Wherein, a code table matrix set is stored in the storage module 511, and the search module 512 searches the code table matrix W corresponding to the code book number in the ...

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Abstract

The embodiment of the invention discloses a multiaerial layered precoding method and a device thereof, which relates to the mobile communication field and is used for reducing the complexity of realizing the layered precoding process, shortening processing delay or saving hardware resource. The multiaerial layered precoding method provided by the embodiment of the invention comprises the following steps: a codebook corresponding to the data flow is determined according to the codebook number and the number of layers of the data flow and the relevant data of the prestored codebook; and carrying out precoding is carried out on the data flow by combining the codebook. The invention is applied to the precoding process of layered data flows of a transmitting end in a MIMO system.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method and device for multi-antenna layered precoding in a MIMO system. Background technique [0002] In order to improve system capacity, the next generation wireless broadband mobile communication system will adopt MIMO (Multi Input Multi Output) technology, that is, multiple antennas are placed at the base station and multiple antennas are placed at the mobile station. A MIMO communication link is formed between the mobile stations. [0003] At the sending end of the MIMO system, the transmission data stream is space-time coded to form P data sub-streams, and the P data sub-streams are transmitted by P antennas. For the transmission data stream that has been divided into v layers, the layered precoding process of converting it into P data sub-streams is as follows: [0004] 1) One is without CDD (Cyclic Delay Diversity, cyclic delay diversity) precoding: [0005] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04L1/06
Inventor 许炳
Owner HUAWEI TECH CO LTD