An FFT Interference Detection Scheme for Interference Suppression in Digital Satellite Communication Systems
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概要
- 論文の詳細を見る
This paper proposes an FFT (Fast Fourier Transform) interference detection for interference suppression which combines notch filtering and FEC (forward error correction) to improve the Pe (probability of error) performance degradation due to co-channel interference in digital satellite communication systems. The proposed FFT interference detection scheme can determine the co-channel interference carrier frequency, power, and bandwidth precisely by using the power detection threshold suitable for the desired signal power spectrum, and the notch filter characteristic can be set according to the results. The interference suppression with the proposed scheme achieves the degradation in required Eb/No to only 1.0 dB at a Pe of 10^lt-4gt compared to that with the optimum notch filter (ideal detection) in unknown CW (continuous wave) and FM (frequency modulation) co-channel interference environments. Moreover, the proposed scheme improves the required Eb/No by 6.5 dB compared to that without a notch filter in an FM interference environment with interference carrier frequency offset normalized by the desired signal clock rate of 0.52, desired to undesired (interference) signal power ratio of 3 dB and interference bandwidth at 10 dB down power point from the peak normalized by the desired signal clock rate of 0.25.
- 社団法人電子情報通信学会の論文
- 1997-09-25
著者
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SUGIYAMA Takatoshi
NTT Wireless Systems Laboratories
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KUBOTA Shuji
NTT Wireless Systems Laboratories
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Sugiyama Takatoshi
Wireless Labortories Ntt Docomo Inc.
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Kubota S
Ntt Network Innovation Lab. Yokosuka‐shi Jpn
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Kubota Shuji
Ntt R&d Management Dept.
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Sugiyama T
Wireless Labortories Ntt Docomo Inc.
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Kubota S
The Authors Are With Fujitsu Laboratories Ltd.
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Suzuki M
Kddi Res. And Dev. Lab. Inc. Kamifukuoka‐shi Jpn
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SUZUKI Masanobu
NTT Wireless Systems Laboratories
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Kubota S
Ntt Wireless Systems Innovation Lab. Kanagawa Jpn
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Sugiyama Takatoshi
Ntt Network Innovation Laboratories
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