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Method and apparatus for wave beam shaping

A beamforming and direction-of-arrival technology, which is applied in communication between multiple stations, space transmit diversity, diversity/multi-antenna systems, etc., can solve the problem of reduced shaping gain, large angular spread, and complex channel space characteristics, etc. problems, to achieve the effect of improving the quality of signal reception

Inactive Publication Date: 2009-02-04
CHINA ACAD OF TELECOMM TECH
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Problems solved by technology

However, in the actual multipath environment, the spatial characteristics of the channel are very complex. In urban micro-cells or complex urban environments, the angular spread is large, and the multipath environment is complex. Suppression of directional multipath signals, thus causing a drop in shaping gain

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  • Method and apparatus for wave beam shaping
  • Method and apparatus for wave beam shaping

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Embodiment Construction

[0078] The core idea of ​​the present invention is to determine the multi-radial signals transmitted by the user terminal by estimating the spatial channel, and further judge which signals are effective signals, and perform beamforming in these effective signal radial directions according to the determined effective signals , so as to ensure the signal reception quality of the user terminal. The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0079] figure 1 It is a schematic diagram of the composition and structure of the beamforming device of the present invention, such as figure 1 As shown, the beamforming device of the present invention includes a channel estimation unit 10, a spatial covariance matrix calculation unit 11, a spatial power spectrum maximum determination unit 12, a user terminal effective direction of arrival determination unit 13 and a beamforming unit 14, Wherein, the channel ...

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Abstract

The invention discloses a method of shaped-beam, relating to the shaped-beam technique, aiming at developing the poor performance of the current shaped-beam in a multi-path environment. The method adopts the technical proposal of: A. processing channel estimation to the user signals received by an antenna array and calculating space covariance matrix and all the characteristic values of the received signals, or determining all the maximums of a spatial power spectrum of the received signals according to the space covariance matrix; B. determining all the directions of arrival of the user signals according to the spatial power spectrum or the characteristic values of the space covariance matrix; and C. using one or a plurality of the directions of arrival as the direction of shaped-beam and processing shaped-beam to the signals sent to a user terminal. A device for realizing the method is also disclosed. The invention processing shaped-beam to each effective multi-path direction develops the receiving quality of signals of the user terminal and better copes with the multi-path environment change.

Description

technical field [0001] The present invention relates to the field of wireless communication, and more specifically relates to a beamforming method and device of a multi-antenna array. Background technique [0002] In the mobile communication system, because the users are usually distributed in all directions, coupled with the multipath effect of the wireless mobile channel, there is a certain spatial distribution of useful signals. First, when the base station receives the signal, the useful signal from each user may reach the base station in different directions, and there is a complex dependency between the signal and its angle of arrival; second, when the base station transmits the signal, the useful signal that can be effectively received by the user It's only part of the signal. Considering this factor, it is a natural idea to adjust the antenna pattern so that it can achieve directional reception and transmission, which is the original source of the concept of beamfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/26
Inventor 孙长果吴柯维
Owner CHINA ACAD OF TELECOMM TECH
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