Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2014, Vol. 37 ›› Issue (4): 49-53.doi: 10.13190/j.jbupt.2014.04.011

• Papers • Previous Articles     Next Articles

Optimal Linear ICI Cancellation Algorithm Based on Whitening Residual ICI and Noise

HUI Yong-tao, LI Bing-bing, TONG Zhao   

  1. State Key Lab of Integrated Service Networks, Xidian University, Xi'an 710071, China
  • Received:2013-04-20 Online:2014-08-28 Published:2014-08-09

Abstract:

To reduce the complexity, the existing algorithms treat the residual inter-carrier interference (ICI) as white noise,which causes a decline in system performance. Consequently, an optimal linear ICI cancellation algorithm based on whitening residual ICI and noise was proposed. Firstly, the whiten matrix is constructed to whiten the residual ICI and noise simultaneously. Then, the optimal linear ICI cancellation matrix was deduced by maximizing the achievable rate in orthogonal frequency division multiplexing (OFDM) systems, which can obtain the time diversity embedded in time variant channels combining with successive interference cancellation. Simulations show that the proposed algorithm obviates the performance loss introduced by band approximation in traditional algorithms and can apply to OFDM systems in the channel estimation accuracy at present.

Key words: orthogonal frequency division multiplexing, residual intercarrier interference, band approximation, whiten matrix

CLC Number: