Wave beam forming method, signal emission equipment and signal reception equipment

A beamforming method and technology for signal receiving equipment, applied in the field of communication, can solve the problems of easy intersection of directional beams, interference between users, errors, etc., and achieve the effects of reducing beam leakage, improving accuracy, and reducing errors

Active Publication Date: 2016-09-21
SHANGHAI HUAWEI TECH CO LTD
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Problems solved by technology

[0004] In the MU-MIMO system, for the 4-dimensional complex vector space where the channel main eigenvectors are located, only 16 precoding matrices are defined in LongTerm Evolution (LTE) R11 and previous versions. According to the above precoding There is a significant error between the main eigenvectors calculated by the matrix and the main eigenvectors of the real channel, and the directional beams generated for different users are easy to cross, and beam crossing will cause strong inter-user interference

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  • Wave beam forming method, signal emission equipment and signal reception equipment
  • Wave beam forming method, signal emission equipment and signal reception equipment
  • Wave beam forming method, signal emission equipment and signal reception equipment

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Embodiment Construction

[0043] For ease of understanding, the technical terms in this application are firstly introduced below:

[0044] 1. Channel quantization codebook: the matrix or vector used to quantize the MIMO channel that has been set by the communication protocol standard. For the LTE system, it is the precoding codebook (Precoding Codebook), Signal to Interference plus Noise Ratio, referred to as SINR) quantization table.

[0045] 2. PMI codeword: In the LTE system, the PMI fed back by the UE is in the precoding codebook as follows:

[0046] The corresponding precoding matrix in

[0047] r,i∈{0,...,B-1}, B is the precoding codebook size, the number of rows of the matrix N T is the number of antennas of the eNB, the number of columns r is the rank of the precoding matrix; PMI itself is the index (i) of each codeword in the precoding codebook.

[0048] 3. Feedback rank (Rank): the rank of the precoding codebook W on which UE feedback is based. When the rank is 1, each PMI codeword is...

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Abstract

The invention discloses a wave beam forming method. The wave beam forming method comprises steps that a downlink pilot frequency symbol sequence and an MUB codebook are acquired by the signal emission equipment, the downlink pilot frequency symbol sequence is weighted according to the MUB codebook to acquire a downlink pilot frequency symbol set, the downlink pilot frequency symbol set is sent on all antennas in a pilot frequency weighting period, a pre-coding matrix indication set sent by the signal reception equipment is received, a reconstruction channel characteristic vector is calculated according to the pre-coding matrix indication set, wave beam forming of the downlink data is carried out according to the reconstruction channel characteristic vector, precision of directive wave beams can be improved, and wave beam leakage among users can be reduced. The invention further provides the signal emission equipment and the signal reception equipment capable of realizing the wave beam forming method.

Description

technical field [0001] The present invention relates to the communication field, in particular to a beam forming method, a signal transmitting device and a signal receiving device. Background technique [0002] Beamforming technology is a multi-antenna transmission technology. Its main principle is to use the wave interference principle to generate a strong directional radiation pattern, so that the main lobe of the radiation pattern adaptively points to the direction of the mobile terminal. Beamforming technology can compensate for signal fading and distortion caused by factors such as space loss and multipath effects during wireless propagation, and at the same time reduce interference between co-channel users, thereby improving communication link performance and system capacity. In a multi-antenna communication system, an evolved base station (Evolved Node B, referred to as eNB) and a user equipment (User Equipment, referred to as UE) are respectively provided with severa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06H04L25/02H04L25/03
CPCH04B7/04H04B7/06H04L25/03H04B7/0408H04B7/0456H04B7/0617H04L25/0202H04L25/0224H04L25/03878
Inventor 杨非朱秋平徐波阙程晟
Owner SHANGHAI HUAWEI TECH CO LTD
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