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

Research output: Contribution to journalConference article

16 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)460-464
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume60
Issue number1
Publication statusPublished - 2004 Dec 1
Event2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States
Duration: 2004 Sep 262004 Sep 29

Fingerprint

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

Cite this

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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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A novel algorithm of inter-subchannel interference cancellation in OFDM systems. / Chang, Ming-Xian.

In: IEEE Vehicular Technology Conference, Vol. 60, No. 1, 01.12.2004, p. 460-464.

Research output: Contribution to journalConference article

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