Computer Science ›› 2013, Vol. 40 ›› Issue (7): 74-76.

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Block Diagonalization Algorithm of Eliminatin g Multiple Base Stations Time-varying Channel Asynchronous Interference

LI Su-ruo   

  • Online:2018-11-16 Published:2018-11-16

Abstract: Due to the combined impact of combined impact of time-varying characteristics of channel state information and channel feedback error,beamforming algorithm can’t completely eliminate the interference between cells,in particular,asynchronous interference,resulting in decline of cell edge user’s transmission rate and the service quality.Aiming at this problem,through studying the channel time-varying characteristics and statistical characteristics of the feedback error,this article put forward a kind of beamforming scheme which considers the statistical characteristics of time varying channel,and is based on block diagonalization.This scheme on the base station side sends the signal coding to eliminate the asynchronous interference so as to improve the cell edge user service quality.The simulation results show that this scheme effectively restrains the disturbance caused by the time-varying channel,improves the capacity of the system.

Key words: Multi-cell,Limited feedback,MIMO,Asynchronous inferences

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