A novel algorithm of inter-subchannel interference cancellation in OFDM systems

研究成果: Conference article同行評審

17 引文 斯高帕斯(Scopus)

摘要

Time-varying multipath channels distort the orthogonality between subchannels in orthogonal frequency-division multiplexing (OFDM) transmission. The loss of subchannel orthogonality causes inter-subchannel interference (ICI), which limits the achievable bit-error rate (BER) at high signal-to-noise ratio (SNR). In this paper, we propose a simple but very effective ICI self-cancellation scheme. A pre-filter and a post-filter are inserted in the transmitter and receiver, respectively. The pre-filter modifies the time-domain signal after inverse fast-Fourier-transform (IFFT) operation in the transmitter, while the post-filter makes the ICI self-cancelled in the receiver. By analysis we can show that if the channel variation within one OFDM symbol interval is linear, then the ICI can be completely removed. Simulation results validate the effectiveness of the proposed scheme.

原文English
頁(從 - 到)460-464
頁數5
期刊IEEE Vehicular Technology Conference
60
發行號1
出版狀態Published - 2004 12月 1
事件2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States
持續時間: 2004 9月 262004 9月 29

All Science Journal Classification (ASJC) codes

  • 電腦科學應用
  • 電氣與電子工程
  • 應用數學

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