Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2005, Vol. 28 ›› Issue (4): 107-110.doi: 10.13190/jbupt.200504.107.xuk

• Reports • Previous Articles    

OFDM System Based on Adaptive Transitting Optimization Beamforming

XU Kai,LUO Tao,YIN Changchuan,YUE Guangxin   

  1. School of Telecommunication Engineering, Beijing University of Posts and Teleco mmunications, Beijing 100876, China
  • Online:2005-08-28 Published:2005-08-28

Abstract:

An adaptive transmitting optimization beamforming space time block codingorthogonal frequency division multiplex (STB〖JP9〗C-〖JP〗OFDM) [JP2]system, called adaptive beamfo rming STB〖JP9〗C-〖JP〗OFDM (AB〖JP9〗F-〖JP〗STB〖JP9〗C-〖JP〗OFDM) system based on channel state information (CSI), was proposed. And the optimization beamforming weight vector was derived in case of maximal receiver signaltonoise ratio. The performance of AB〖JP9〗F-〖JP〗STB〖JP9〗C-〖JP〗OFDM system when there are channel estimation errors w as given. Performance and computer simulation results of the system over wireless Reyleigh fading channels show that all the diversity resource can explored by the system, and the performance of the system can be improved significantly when compared with STB〖JP9〗C-〖JP〗OFDM, spacetime trellis codin〖JP9〗g-〖JP〗OFDM(STT〖JP9〗C-〖JP〗OFDM) and trellis code modulatio〖JP9〗n-〖JP〗STB〖JP9〗C-〖JP〗OFDM (TC〖JP9〗M-〖JP〗STB〖JP9〗C-〖JP〗OFDM) system.

Key words: orthogonal frequency division multiplex, beamforming, spacetime block coding

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