Uplink collaboration relaying beam forming method based on convex optimization

A technology of beamforming and cooperative relay, applied in baseband system components, diversity/multi-antenna systems, advanced technologies, etc., can solve the problems of high computational complexity and easy to fall into local optimum, and achieve good results and computational complexity Reduce and avoid the effect of iteration

Inactive Publication Date: 2013-08-28
SHANDONG UNIV
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Problems solved by technology

For this model, the previous methods mainly use convex optimization iteratively to maximize the signal-to-interference-noise ratio and improve system performance, but this method has high computational complexity and is easy to fall into local optimum

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  • Uplink collaboration relaying beam forming method based on convex optimization
  • Uplink collaboration relaying beam forming method based on convex optimization
  • Uplink collaboration relaying beam forming method based on convex optimization

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Embodiment Construction

[0019] Aiming at a cooperative communication system with multi-source, multi-relay and multi-antenna devices at the base station, the present invention proposes a joint optimization method using convex optimization to realize the beamforming weight vector at the relay node and the linear equalization vector at the base station. When the signal-to-noise ratio satisfies a given value, the relay node power is minimized. The original problem of the joint optimization is non-convex and multi-vector, and the present invention transforms it into a problem of only relay node beamforming weight vector optimization by exploring the connection between two vectors, and uses convex optimization to obtain the vector , and then the corresponding optimal linear equilibrium vector can be obtained.

[0020] The present invention will be further described below in conjunction with specific embodiments (but not limited to this example) and accompanying drawings.

[0021] as attached figure 1 As...

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Abstract

The invention provides a technical scheme for collectively optimizing a relay node beam forming weight vector and a base-station linear equilibrium vector so as to minimize the power consumption at a relay node on the premise that a received signal-to-noise ratio at a base station is not smaller than a certain threshold value for a base-station device provided with a multi-antenna multi-source multi-relay collaborative communication system. The optimization problem includes two vectors to be optimized. The method comprises the following steps of: first utilizing a relay node beam forming vector to express an optimized linear equilibrium vector, converting the collectively optimized problem of the two vectors to the optimization problem only containing the relay node beam forming weight vector, utilizing the convex optimization way to first solve the optimized beam forming weight vector, further solving the optimized base-station linear equilibrium vector according to the relation of the two vectors, and realizing the minimization of the power at the relay node.

Description

technical field [0001] The invention discloses a multi-source and multi-relay uplink cooperative beamforming method based on convex optimization, which belongs to the technical fields of wireless communication and signal processing. Background technique [0002] In the past few decades, wireless communication technology has been greatly developed, and people's demand for unlimited fun anytime, anywhere is at an all-time high. Mobile communication terminals have entered thousands of households. Mobile communication is no longer synonymous with pure voice transmission. It has become an important channel for multimedia transmission. This puts forward higher requirements for the data rate, reliability and spectrum efficiency of wireless communication. Multiple-input multiple-output (MIMO) system has come into people's field of vision under such application background. [0003] Although the MIMO system has the advantages of high spectral efficiency and high reliability, the appl...

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Application Information

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IPC IPC(8): H04B7/06H04L25/02
CPCY02D30/70
Inventor 刘琚郑丽娜王新华王清卢冰冰
Owner SHANDONG UNIV
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