### 摘要

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.

原文 | English |
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主出版物標題 | Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop |

頁面 | 75-82 |

頁數 | 8 |

出版狀態 | Published - 2006 十二月 1 |

事件 | 5th International Workshop on Multi-Carrier Spread-Spectrum, MC-SS 2005 - Oberpfaffenhofen, Germany 持續時間: 2005 九月 14 → 2005 九月 16 |

### 出版系列

名字 | 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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國家 | Germany |

城市 | Oberpfaffenhofen |

期間 | 05-09-14 → 05-09-16 |

### 指紋

### All Science Journal Classification (ASJC) codes

- Computer Networks and Communications

### 引用此文

*Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop*(頁 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, 頁 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.

研究成果: 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 -