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

研究成果: Conference article

16 引文 (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 十二月 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 九月 262004 九月 29

指紋

Interference Cancellation
Orthogonal Frequency Division multiplexing (OFDM)
Orthogonal frequency division multiplexing
Transmitters
Interference
Filter
Multipath propagation
Orthogonality
Fast Fourier transforms
Bit error rate
Transmitter
Signal to noise ratio
Receiver
Multipath Channels
Fast Fourier transform
Cancellation
Error Rate
Time Domain
Time-varying
Interval

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

引用此文

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abstract = "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.",
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AB - 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.

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