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A Transmitting Method for Joint Beamforming and Antenna Selection in Cooperative Communication Systems

A technology of combined beamforming and antenna selection, applied in transmission systems, space transmit diversity, radio transmission systems, etc., to achieve the effect of improving energy consumption efficiency

Active Publication Date: 2020-12-01
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

By solving the energy efficiency based precoding design problem, new precoding vectors are obtained every iteration

Method used

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  • A Transmitting Method for Joint Beamforming and Antenna Selection in Cooperative Communication Systems
  • A Transmitting Method for Joint Beamforming and Antenna Selection in Cooperative Communication Systems
  • A Transmitting Method for Joint Beamforming and Antenna Selection in Cooperative Communication Systems

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Embodiment Construction

[0029] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] figure 1 It is a schematic diagram of the beamforming mode of the cooperative communication system, figure 2 Flowchart of the transmission scheme for joint beamforming and antenna selection in a CoMP system, combined with figure 1 and figure 2 The specific implementation is described, and the applicable scenarios include the existing LTE-A system and the future new generation of green radio access network architecture C-RAN.

[0031] The transmission scheme of joint beamforming and antenna selection in the cooperative communication system of the present invention includes the following steps:

[0032] Step 1. The base station pool obtains the downlink channel status information of the cooperative users h l,m,n Indicates the channel matrix of the nth user from base station l to base station m, assuming that there are N coopera...

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Abstract

The invention discloses a transmission scheme combining beamforming and antenna selection in a coordinated communication system, and belongs to the technical field of coordinated beamforming under an LTE-A (Long Term Evolution-Advanced) system. The scheme is specifically implemented by the following steps: initializing a transmission antenna selection matrix and a precoding vector; solving the problem of non-convex optimization of maximum energy efficiency to obtain a new pre-encoded vector; and on the basis of comparing new pre-encoded vector elements, updating a selection matrix of a user transmission antenna, and performing repeated iterative convergence to obtain an antenna selection matrix of the system and an optimized beamforming pre-encoded vector corresponding to the antenna selection matrix. The transmission scheme aims to increase the energy consumption efficiency of a base station, and obtain an optimal solution of system performance by design under the condition that a transmission antenna is uncertain specific to a pre-encoded vector designing method of maximized energy efficiency, so that the aims of saving energy and reducing emission of C-RAN (Centralized-Radio Access Network) wireless network architecture are fulfilled.

Description

technical field [0001] The invention belongs to the field of coordinated beamforming under the LTE-A system, relates to beamforming precoding vector design and antenna selection scheme in a coordinated communication system, and particularly relates to coordinated beamforming (Coordinated Scheduling / Coordinated) in a C-RAN environment Beam-forming, CS / CB) mode in the beamforming design method. Background technique [0002] Due to the practical needs of mobile communications, the Green Cloud Architecture Radio Access Network (C-RAN) came into being. During the design process of the C-RAN system, Coordinated Multi-Point transmission (CoMP) has always been regarded as a key technology to improve system spectrum efficiency and edge user throughput, and has received extensive attention and research. An implementation form of the CoMP technology is: base stations share channel information of cooperative users, and implement interference suppression of cooperative users among multi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/0456
CPCH04B7/0456H04B7/0663H04B7/0695Y02D30/70
Inventor 余翔管茂林段思睿郑寒冰
Owner CHONGQING UNIV OF POSTS & TELECOMM