Journal of Shanghai Jiaotong University ›› 2011, Vol. 45 ›› Issue (03): 308-0312.

• Radiao Electronics, Telecommunication Technology • Previous Articles     Next Articles

A Novel ICI Cancellation Algorithm Based on Channel Segmentationcascade in OFDM System

 XU  Xing-Hui, HE  Chen   

  1. (School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2010-03-21 Online:2011-03-30 Published:2011-03-30

Abstract:  For Orthogonal Frequency Division Multiplexing (OFDM) wireless systems with high frequency, deficiencies caused by Doppler frequency offset and the carrier phase noise are much higher,which will introduce InterCarrier Interference (ICI) and degrade the performance. Using channel segmentation,an equivalent method was presented in this paper,which transfers linear timevariant channel into the cascading of timeinvariant channel and timevariant channel with no delay. Then onedimensional equalization can be achieved at the receiver to suppress ICI, avoiding calculating the frequency domain channel response matrix and its inverse matrix. The analysis and simulation results show that, the proposed algorithm can effectively reduce the complexity to O(N) with almost no performance loss, compared to the existing low complexity MMSE.

Key words: orthogonal frequency division multiplexing(OFDM), intercarrier interference(ICI), linear timevariant channel, frequencydomain equalization, channel segmentationcascade (CSC)

CLC Number: