A precoding method and device based on history trajectory in cooperative communication

Abstract

The invention discloses a pre-coding device in cooperative communication based on a historical track, and the device comprises a return stroke interface, a pre-coder, and a historical track recorder. The device corrects a current wrong construction value through employing the historical track of the pre-coder, thereby reducing the impact caused by non-ideal return strokes in a cooperative system, and reducing the interference among channels and the interference among users. The experiment result indicates that the method can reduce a half of the interference among channels and the interference among users at most. The device can correct a wrong pre-coder through the historical track, and improves the accuracy of the pre-coder, thereby reducing the impact on pre-coding errors from incomplete channel state information (CSI), and reducing the interference among channels and the interference among users in a cooperative communication system, wherein the interference is caused by the above impact.

Description

technical field [0001] The present invention relates to the technical field of wireless broadband communication, in particular to a precoding method and device based on historical traces in cooperative communication Background technique [0002] The rapid development of wireless broadband communication technology puts forward higher capacity requirements for wireless networks. From 2000 to 2010, the capacity of cellular network or short-distance wireless communication has increased by 30-50 times; the fifth generation mobile communication (5G ) was proposed to meet the growth in communication capacity demand of 1000 times compared to the current one, and the industry widely predicts that 5G will be deployed in 2020. Cooperative communication can improve system capacity and diversity performance, improve signal coverage, thereby improving the data rate of cell edge users and the overall performance of the cellular system. [0003] Typical cooperative communication requires e...

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Problems solved by technology

[0005] In 2015, S.Lagen, A.Agustin and J.Vidal published an article titled "Decentralized Coordinated Precoding for Dense TDDSmall Cell Networks" in the journal "IEEE Transactions on Wireless Communications", proposing a decentralized Precoding mechanism, although this mechanism also considers the situation that the base station has inaccurate CSI, it can only be applied to time division multiplexing (TDD) systems and decentralized coordination (the decentralized coordination refers to the cooperative system without a central unit , a cooperative system where all precoding calculations are completed at each cooperative node)

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