Method and system for transmitting data based on random beam shaping

A data transmission method and beamforming technology, applied in baseband system components, multi-frequency code systems, diversity/multi-antenna systems, etc.

Inactive Publication Date: 2009-01-28
ELECTRONICS & TELECOMM RES INST +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The problem to be solved by the embodiments of the present invention is to provide a data transmission method and system based on random beamforming, so as to overcome the defect that the existing OCS technology is only applicable to MIMO systems with no more than 3 transmit antennas

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  • Method and system for transmitting data based on random beam shaping
  • Method and system for transmitting data based on random beam shaping
  • Method and system for transmitting data based on random beam shaping

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Embodiment Construction

[0053]The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0054] The flow of a data transmission method based on random beamforming in an embodiment of the present invention is as follows figure 2 shown, including the following steps:

[0055] In step s201, the base station generates a beamforming unitary matrix C in which the amplitude of each element is constant and the phase varies randomly. The specific process is:

[0056] At the start time t of the training period, the base station randomly generates M phases θ uniformly distributed in the range [0, 2π) t =[θ 1 θ 2 …theta M ];

[0057] The base station generates an M×M dimensional Fourier matrix

[0058]

[0059] where w=e -j2π / M ;

[0060] The phase vector θ ...

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Abstract

The invention discloses a method for transmitting data based on random wave beam shaping, comprising the following steps: a base station terminal generates a beam shaping unitary matrix with constant amplitude for each element and random variable phase position; the base station terminal transmits a plurality of different training symbols to user equipment through the unitary matrix; the user equipment feeds back a received maximum value in a plurality of SINR corresponding to a launching beam and a corresponding number of the launching beam to a base station; and the base station selects the user equipment corresponding to the maximum SINR in the beam for different launching beams for data transmission. The method is applicable to arbitrary number of launching antennae, not only ensures the same amplitude for all the elements of a beam shaping matrix so as to significantly reduce the requirement on a dynamic range of a power amplifier and realize the random beam shaping technology with only one set of phase switcher as well, but also can obtain the same thuoughput as the prior random beam shaping system.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a data transmission method and system based on random beamforming. Background technique [0002] MIMO (Multiple-Input Multiple-Output) communication system has higher spatial multiplexing gain and diversity gain by using multiple transmitting and receiving antennas, and can be obtained through multi-user scheduling technology in multi-user systems Significant multi-user diversity gain, so it will become the key technology of the next generation wireless communication system. In a MIMO system, beamforming technology can be used to obtain a certain beamforming gain by weighting signals on different transmit antennas. However, conventional beamforming techniques require high computational complexity and feedback complexity. [0003] At present, a wireless communication technology using OBS (Opportunistic Beamforming System, random beamforming system) has the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L25/03H04L27/26H04B7/06H04B7/08
Inventor 夏明华金洙畅王京冯伟
Owner ELECTRONICS & TELECOMM RES INST
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