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Massive Multiple-Input Multiple-Output (Massive MIMO) pre-coding method

A large-scale antenna and precoding technology, applied in diversity/multi-antenna systems, radio transmission systems, space transmit diversity, etc., can solve the problems of high bit error rate and low energy efficiency in Massive MIMO systems

Active Publication Date: 2016-09-21
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a large-scale antenna precoding method to solve the problems of high bit error rate and low energy efficiency in the Massive MIMO system in the prior art

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[0053] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0054] Aiming at the problems of high bit error rate and low energy efficiency in the Massive MIMO system in the prior art, the present invention performs mixed precoding on radio frequency and baseband by minimizing the mean square error, thereby effectively reducing the bit error rate and improving energy efficiency.

[0055] In a Massive MIMO system, a large-scale uniform linear array is usually configured on the base station side. In the embodiment of the present invention, it is assumed that the complete channel state information (CSI-T) is known at the transmitting end, and the combined design of transmitting precoding and receiving is performed by using the channel state information. The number of RF links is reduced by decoupling precoding, and t...

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Abstract

The invention provides a Massive Multiple-Input Multiple-Output (Massive MIMO) pre-coding method, which aims to solve the problems of high error rate and low energy efficiency of a Massive MIMO system in the prior art. The method comprises the following steps: obtaining a mathematical optimization model of the Massive MIMO system; designing a receiving end base band decoding matrix; designing a sending end base band pre-coding matrix; designing a sending end radio frequency pre-coding matrix; and outputting the base band and radio frequency hybrid pre-coding matrixes. The Massive MIMO pre-coding method provided by the invention has the benefits that the base band and radio frequency hybrid pre-coding method adopts the principle of mean square error minimization, and combines the convex optimization method with the Particle Swarm Ant Colony Optimization (PSACO) method, so as to achieve a high iteration rate and obtain the hybrid pre-coding matrixes; compared with the traditional pre-coding method, the method can better reduce the error rate of the system; meanwhile, compared with the full-digital base band pre-coding, the method has the advantages of low hardware implementation cost and high energy efficiency.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a precoding method for a large-scale antenna. Background technique [0002] With the continuous development of wireless communication technology, users' demand for data transmission rate has increased sharply, and the demand for high-speed data services and access at any time has shown an explosive growth trend, which requires wireless communication networks to have greater and greater capacity and capacity. throughput. Massive Multiple-Input Multiple-Output (Massive MIMO) technology can provide greater spatial multiplexing / diversity gain by configuring large-scale antenna arrays on the base station side or terminals, and improve the system's spectrum efficiency, energy efficiency and transmission. Reliability has become one of the hotspots in academic research. [0003] In the field of wireless communication, the precoding technology utilizes the cha...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04
CPCH04B7/0413H04B7/0456Y02D30/70
Inventor 陈月云邢雅欣
Owner UNIV OF SCI & TECH BEIJING
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