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A codebook search method and device

A search method and codebook technology, applied in the field of codebook search methods and devices, can solve problems such as ineffective application and increased computational complexity

Active Publication Date: 2020-09-08
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although the above traversal method can obtain the optimal precoding matrix, as the number of codebooks increases, the computational complexity will increase exponentially when traversing and searching the codebook, which cannot be effectively applied in practice.

Method used

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  • A codebook search method and device
  • A codebook search method and device
  • A codebook search method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a codebook search method, such as figure 1 As shown, the processing flow of the method in this embodiment includes the following steps:

[0049] Step 101: Search for the first optimal precoding matrix from the precoding matrix set.

[0050] Generally, a codebook is a set of several precoding matrices, that is, a set of precoding matrices, which can be expressed as C={W 0 ,W 1 ,...,W i ,...,W N-1 }, and 0≤i≤N-1, where N is the number of precoding matrices in the precoding matrix set; in the initial case, the codebook search device will search for the first precoding matrix set The optimal precoding matrix of 1 time.

[0051] Here, the codebook search device may use a traversal search method or other search methods to search all precoding matrices in the precoding matrix set, and search for the first optimal precoding matrix from the precoding matrix set .

[0052] Optionally, the codebook search apparatus may use the traverse search method to search fo...

Embodiment 2

[0093] The embodiment of the present invention also provides a codebook search device, such as figure 2 As shown, the device includes: a searching unit 201 and a determining unit 202, where

[0094] The searching unit 201 is configured to search for the first optimal precoding matrix from the precoding matrix set;

[0095] The determining unit 202 is configured to determine the nth codebook search subset according to the n-1th optimal precoding matrix and the nth chord distance level searched by the searching unit 201; The nth codebook search subset is a subset of the precoding matrix set;

[0096] The searching unit 201 is further configured to search for the nth optimal precoding matrix from the nth codebook search subset determined by the determining unit 202; where n is 2,..., m, the m is an integer greater than or equal to 2.

[0097] Optionally, the determining unit 202 is specifically configured to determine the nth time according to the n-1th optimal precoding matrix and the...

Embodiment 3

[0110] The embodiment of the present invention also provides a codebook search device, such as image 3 As shown, the device includes: a storage module 301, a codebook search and selection module 302, a channel time correlation evaluation module 303, and a codebook search subset determination module 304; wherein,

[0111] The storage module 301 is configured to pre-store the corresponding relationship, and the corresponding relationship is the corresponding relationship between the precoding matrix index, the chord distance level and the codebook search subset;

[0112] The codebook search and selection module 302 is configured to search for the first optimal precoding matrix from the precoding matrix set;

[0113] The channel time correlation evaluation module 303 is configured to monitor the channel time correlation index in real time and calculate the channel time correlation index value at the nth time;

[0114] The codebook search subset determining module 304 determines the nth c...

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Abstract

Disclosed is a codebook search method, comprising: finding a 1st optimal pre-coding matrix from a pre-coding matrix set; determining an nth codebook search subset according an (n-1)th optimal pre-coding matrix and an nth chordal distance level, the nth codebook search subset being a subset of the pre-coding matrix set; and finding an nth optimal pre-coding matrix from the nth codebook search subset, wherein n is 2, …, m, and m is an integer greater than or equal to 2. Also disclosed are a codebook search device and a storage medium.

Description

Technical field [0001] The present invention relates to the field of wireless communication, in particular to a codebook search method and device. Background technique [0002] At present, multiple-input multiple-output (MIMO) technology, as one of the main methods to improve the spectrum efficiency of wireless communication, has been applied to the wireless local area network communication standard 802.11n / ac, long term evolution (Long Term Evolution, LTE). ) / Enhanced Long Term Evolution (LTE-Advanced, LTE-A) and other new generation high throughput wireless communication protocols. [0003] In practical applications, since the channel between the base station and the terminal in the MIMO wireless communication system has time-varying multipath fading characteristics, the base station uses precoding technology to ensure transmission reliability and improve system performance. The existing codebook-based limited feedback precoding technology is widely used due to the small amount ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456
CPCH04B7/0456H04B7/04
Inventor 易立强
Owner SANECHIPS TECH CO LTD
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