### Abstract

Orthogonal frequency-division multiplexing (OFDM) transmission has inter-subchannel interference (ICI) in fast fading environment. Several algorithms have been proposed to reduce the ICI effects. Among these algorithms, the ICI self-cancellation schemes [3, 4] needs not to estimate the multipath responses, and its performance doesn't depend on the signal-to-noise ratio (SNR). In [4], the pre-processor in the transmitter extends the original symbol interval to obtain diversity that can be used by the post-processor of the receiver to make ICI self-cancelled. When the original symbol interval is doubled and the multipath channels vary linearly with time within the extended symbol interval, this algorithm can completely the ICI. However, the complexity of the post-processor in [4] is not low. It needs N +1 parallel fast-Fourier transforms (FFT). Moreover, there is no performance comparison between [3] and [4]. In this paper, we continue our work in [4] and propose an equivalent low-complexity post-processor that needs only one FFT. We also give analyze the variance of the residual ICI and derive an bit-error probability (BEP) upper bound. Furthermore, we compare the performance of our algorithm with Zhao's algorithm and give some related discussion.

Original language | English |
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Title of host publication | Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop |

Pages | 75-82 |

Number of pages | 8 |

Publication status | Published - 2006 Dec 1 |

Event | 5th International Workshop on Multi-Carrier Spread-Spectrum, MC-SS 2005 - Oberpfaffenhofen, Germany Duration: 2005 Sep 14 → 2005 Sep 16 |

### Publication series

Name | Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop |
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### Other

Other | 5th International Workshop on Multi-Carrier Spread-Spectrum, MC-SS 2005 |
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Country | Germany |

City | Oberpfaffenhofen |

Period | 05-09-14 → 05-09-16 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Computer Networks and Communications

### Cite this

*Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop*(pp. 75-82). (Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop).

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*Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop.*Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop, pp. 75-82, 5th International Workshop on Multi-Carrier Spread-Spectrum, MC-SS 2005, Oberpfaffenhofen, Germany, 05-09-14.

**Anovel algorithm of inter-subchannel interference cancellation for OFDM systems.** / Chang, Ming-Xian.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Anovel algorithm of inter-subchannel interference cancellation for OFDM systems

AU - Chang, Ming-Xian

PY - 2006/12/1

Y1 - 2006/12/1

N2 - Orthogonal frequency-division multiplexing (OFDM) transmission has inter-subchannel interference (ICI) in fast fading environment. Several algorithms have been proposed to reduce the ICI effects. Among these algorithms, the ICI self-cancellation schemes [3, 4] needs not to estimate the multipath responses, and its performance doesn't depend on the signal-to-noise ratio (SNR). In [4], the pre-processor in the transmitter extends the original symbol interval to obtain diversity that can be used by the post-processor of the receiver to make ICI self-cancelled. When the original symbol interval is doubled and the multipath channels vary linearly with time within the extended symbol interval, this algorithm can completely the ICI. However, the complexity of the post-processor in [4] is not low. It needs N +1 parallel fast-Fourier transforms (FFT). Moreover, there is no performance comparison between [3] and [4]. In this paper, we continue our work in [4] and propose an equivalent low-complexity post-processor that needs only one FFT. We also give analyze the variance of the residual ICI and derive an bit-error probability (BEP) upper bound. Furthermore, we compare the performance of our algorithm with Zhao's algorithm and give some related discussion.

AB - Orthogonal frequency-division multiplexing (OFDM) transmission has inter-subchannel interference (ICI) in fast fading environment. Several algorithms have been proposed to reduce the ICI effects. Among these algorithms, the ICI self-cancellation schemes [3, 4] needs not to estimate the multipath responses, and its performance doesn't depend on the signal-to-noise ratio (SNR). In [4], the pre-processor in the transmitter extends the original symbol interval to obtain diversity that can be used by the post-processor of the receiver to make ICI self-cancelled. When the original symbol interval is doubled and the multipath channels vary linearly with time within the extended symbol interval, this algorithm can completely the ICI. However, the complexity of the post-processor in [4] is not low. It needs N +1 parallel fast-Fourier transforms (FFT). Moreover, there is no performance comparison between [3] and [4]. In this paper, we continue our work in [4] and propose an equivalent low-complexity post-processor that needs only one FFT. We also give analyze the variance of the residual ICI and derive an bit-error probability (BEP) upper bound. Furthermore, we compare the performance of our algorithm with Zhao's algorithm and give some related discussion.

UR - http://www.scopus.com/inward/record.url?scp=84900584801&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84900584801&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84900584801

SN - 1402044356

SN - 9781402044359

T3 - Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop

SP - 75

EP - 82

BT - Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop

ER -