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Down-going wave beam forming method and device

A beamforming and weighting vector technology, which is applied in the field of downlink beamforming methods and devices, can solve the problem of inability to obtain beamforming weight vectors of two downlink antennas

Active Publication Date: 2013-12-25
WUHAN HONGXIN TELECOMM TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a downlink beamforming method and device to solve the technical problem in the prior art that the beamforming weight vectors of the downlink two antennas cannot be obtained through channel reciprocity

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  • Down-going wave beam forming method and device

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Embodiment Construction

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention shall fall within the protection scope of the present invention.

[0020] A downlink beamforming method provided by the present invention will firstly be introduced in detail below.

[0021] Such as figure 2 As shown, it is a flow chart of Embodiment 1 of a downlink beamforming method provided by the present invention. This embodiment may specifically include the following steps:

[0022] S201: Acquire a first weight vector and a s...

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Abstract

The invention discloses a down-going wave beam forming method and device. The down-going wave beam forming method comprises the steps of obtaining a first weighted vector and a second weighted vector and conducting expansion on the first weighted vector according to the similarity between the second weighted vector and the first weighted vector so as to obtain a target weighted vector which meets the requirements for multiple-antenna down-going wave beam forming. The step of obtaining the first weighted vector further comprises the processes that an upstream channel is estimated according to detection reference signals sent by a terminal, and the first weighted vector is obtained by the utilization of the reciprocity of the upstream channel and a downstream channel. The step of obtaining the second weighted vector further comprises the processes that the terminal sends channel state information reference signals so that the terminal can feed back a precoding matrix index number determined according to the channel state reference signals; the precoding matrix index number fed back by the terminal is received, the second weighted vector is determined according to the index number, and the second weighted vector is a precoding matrix corresponding to the precoding matrix index number. Through weighted vector expansion, down-going wave beam forming weighted vectors applicable to multiple antennas are obtained.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a downlink beamforming method and device. Background technique [0002] Signals propagating in space are often interfered by the local cell or other adjacent cells. The desired signal may use the same frequency band as the interference signal. The traditional method cannot separate the desired signal from the received signal. The smart antenna can separate the useful signal from the space by using the different directions of arrival of the desired signal and the interference. The beamforming technology is used. The main principle of the beamforming technology is to use the strong correlation of the spatial channel and the interference principle of the wave. The weighted vector produces a strong directional radiation pattern, that is, the direction of the transmitted signal is adaptively pointed to the direction of the user, and at the same time, the signal ...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04L1/06
Inventor 郑璐滢张元雨吕喆朱宇霞姜韬
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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