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Path-by-path channel estimation method and codebook construction method under multipath channel

A channel estimation and codebook technology, applied in channel estimation, baseband system components, electrical components, etc., can solve problems such as estimation bias, and achieve the effect of avoiding estimation bias, facilitating reconstruction, and reducing the influence of estimated paths.

Active Publication Date: 2020-11-10
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0007] To sum up, the existing methods have the following problems: due to the estimated deviation caused by the remaining energy of the estimated path, the mobile terminal needs to obtain the antenna arrangement information of the base station, and the antenna array has different characteristics in each angle and uses the same method for the entire angle domain. codebook

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  • Path-by-path channel estimation method and codebook construction method under multipath channel
  • Path-by-path channel estimation method and codebook construction method under multipath channel
  • Path-by-path channel estimation method and codebook construction method under multipath channel

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[0041] The specific embodiments of the invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0042] Such as figure 1 As shown, the present invention provides a method for path-by-path channel estimation under a multipath channel, the method comprising:

[0043] S1: Initialize l=1, generate multi-level codebook set {F l,s |s=1,...,S}, the codebook contains S-level codewords, and as the number of levels increases, each level of codewords corresponds to a higher-precision angle range.

[0044] S2: Estimate the lth path and get the AOD information θ of this path t (l).

[0045] S3: Yes {F l,s} in each level of codewords, and delete the alignment θ in each level of codewords t The beamforming vector component in the (l) direction obtains a new codebook set F for est...

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Abstract

The invention provides a channel estimation method under a multi-path channel, and a codebook construction method in wireless communication. The method comprises: a new channel estimation scheme for reducing influence of estimated paths on channel estimation one by one, wherein a codebook can be updated or improved according to estimated path information in the scheme, so that the purpose that a receiving end does not receive energy propagated by the estimated paths any longer can be achieved; a new multi-level codebook design scheme, wherein each codeword in the codebook is formed by addition of one or more narrow beams; the codebook is convenient to improve, and suitable for the scheme for reducing influence of the estimated paths one by one; and in addition, according to the characteristics of the antenna gain in angle domains, different optimal codebooks are used in different angle domains, so that the global optimal effect is realized.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a path-by-path channel estimation method and a codebook design and construction method suitable for multi-path channels. Background technique [0002] The MIMO technology can improve the capacity of the wireless channel, that is, the utilization rate of the spectrum can be significantly improved without increasing the bandwidth and the transmission power of the antenna. However, the traditional MIMO technology still cannot meet the demands of the contemporary exponentially increasing wireless transmission rate. In 2010, Bell Labs proposed the concept of massive MIMO. Compared with traditional MIMO systems, massive MIMO systems use hundreds of antennas to provide services to users at the same time, which not only inherits all the advantages of MIMO systems, but also makes communication more robust, safer and more effective. [0003] In massive MIMO systems, accurate channel...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04B7/0456H04B7/0417
CPCH04B7/0417H04B7/0456H04L25/0202
Inventor 孙浩强李南希李高斯韦再雪张欣杨大成
Owner BEIJING UNIV OF POSTS & TELECOMM
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