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A Uplink Beamforming Method for Multi-source and Multi-Relay Cooperative Network

A multi-source multi-relay, beamforming technology, applied in radio relay systems, diversity/multi-antenna systems, space transmit diversity and other directions, can solve the problem of not being globally optimal

Inactive Publication Date: 2015-12-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this model, the original beamforming optimization scheme is solved by an iterative method, which is not globally optimal

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  • A Uplink Beamforming Method for Multi-source and Multi-Relay Cooperative Network
  • A Uplink Beamforming Method for Multi-source and Multi-Relay Cooperative Network
  • A Uplink Beamforming Method for Multi-source and Multi-Relay Cooperative Network

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Embodiment Construction

[0018] Aiming at the cooperative network of multi-source and multi-relay with multi-antenna at the base station end device, the present invention proposes a joint optimization problem of beamforming weight vector at the relay node and linear equalization vector at the base station by using convex optimization and dichotomy. The original problem of the joint optimization is non-convex and multi-vector, and the present invention optimizes the system by discovering the connection between two vectors and having a unique linear equalization vector for each beamforming weight vector. In this way, the original problem can be transformed into a single-vector optimization problem, which is also a feasibility problem. We use the dichotomy method and use convex optimization in each iteration to obtain the target value of the system SINR optimization, and the corresponding The corresponding beamforming weight vector and equalization vector at the base station.

[0019] The present inventi...

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Abstract

For a multisource multi-relay base station provided with a multi-antenna collaborative communication model, the invention provides a technical scheme of joint optimization of weight vectors of relay nodes and linear equalization vectors of the base station so as to enable the minimum signal interference noise ratio to be maximized in the base station on the premise that total power of the relay nodes is not larger than the given threshold. Two vectors to be optimized are involved in the optimization. By the upstream beam forming method, the internal link between the two vectors is found, multi-vector optimization is changed into single-vector optimization and further into convex feasibility, the optimum value of the signal interference noise ratio is solved by means of convex optimization and the bisection method, and the beam forming weight vector of the relay nodes and the configuration value of the linear equalization vectors in the base station are obtained when the optimum value is obtained.

Description

technical field [0001] The invention discloses an uplink beamforming method for multi-antenna configuration at a base station and a multi-source multi-relay cooperative network, and belongs to the technical fields of signal processing and wireless communication. Background technique [0002] Antenna diversity technology has attracted much attention in the past few decades due to its multiplexing and diversity gain, which can significantly improve the spectrum efficiency and reliability of wireless communication systems. Among all space diversity technologies, beamforming technology obtains space diversity gain through multi-antenna transceivers, and is the most common because of its simple implementation. In an actual application environment, multiple antennas can be configured on the base station, but due to limitations in space, complexity, and power consumption, it is not feasible to configure multiple antennas on the mobile terminal. In recent years, in cooperative dive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04B7/06H04B7/14
Inventor 刘琚王超许宏吉董郑王新华王清
Owner SHANDONG UNIV