High-quality signal transmission techniques for personal communication systems - novel coherent demodulation and ADPCM voice transmission with click noise processing-

K. Kobayshi; T. Sakata; Y. Matsumoto; K. Enomoto; S. Kubota; S. Kato

High-quality signal transmission techniques for personal communication systems - novel coherent demodulation and ADPCM voice transmission with click noise processing-

K. Kobayshi, T. Sakata, Y. Matsumoto, K. Enomoto, S. Kubota, S. Kato

研究成果: Conference article › 査読

抄録

This paper proposes high-quality signal transmission techniques for personal communication systems. A novel coherent demodulatior - VCHACE, Variable Carrier filter and HAng-up free clock recovery Coherent dEmodulator - has been proposed. The proposed carrier recovery circuit uses a reverse-modulation scheme with variable band-width carrier filter. By employing the proposed scheme, the FER (Frame Error Rate) performance is improved by 2dB compared with the differential detection scheme in typical Rayleigh fading environments. An ADPCM voice transmission scheme that employs a click noise suppressor has been also proposed. It achieves a voice quality improvement of 0.5 points in MOS evaluation (3dB improvement in required Eb/No) compared with conventional muting schemes in fading environments.

本文言語	English
ページ（範囲）	733-737
ページ数	5
ジャーナル	IEEE Vehicular Technology Conference
巻	2
出版ステータス	Published - 1995 1 1
外部発表	はい
イベント	Proceedings of the 1995 IEEE 45th Vehicular Technology Conference. Part 2 (of 2) - Chicago, IL, USA 継続期間: 1995 7 25 → 1995 7 28

ASJC Scopus subject areas

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

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引用スタイル

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title = "High-quality signal transmission techniques for personal communication systems - novel coherent demodulation and ADPCM voice transmission with click noise processing-",

abstract = "This paper proposes high-quality signal transmission techniques for personal communication systems. A novel coherent demodulatior - VCHACE, Variable Carrier filter and HAng-up free clock recovery Coherent dEmodulator - has been proposed. The proposed carrier recovery circuit uses a reverse-modulation scheme with variable band-width carrier filter. By employing the proposed scheme, the FER (Frame Error Rate) performance is improved by 2dB compared with the differential detection scheme in typical Rayleigh fading environments. An ADPCM voice transmission scheme that employs a click noise suppressor has been also proposed. It achieves a voice quality improvement of 0.5 points in MOS evaluation (3dB improvement in required Eb/No) compared with conventional muting schemes in fading environments.",

author = "K. Kobayshi and T. Sakata and Y. Matsumoto and K. Enomoto and S. Kubota and S. Kato",

year = "1995",

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language = "English",

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journal = "IEEE Vehicular Technology Conference",

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note = "Proceedings of the 1995 IEEE 45th Vehicular Technology Conference. Part 2 (of 2) ; Conference date: 25-07-1995 Through 28-07-1995",

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AU - Kobayshi, K.

AU - Sakata, T.

AU - Matsumoto, Y.

AU - Enomoto, K.

AU - Kubota, S.

AU - Kato, S.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - This paper proposes high-quality signal transmission techniques for personal communication systems. A novel coherent demodulatior - VCHACE, Variable Carrier filter and HAng-up free clock recovery Coherent dEmodulator - has been proposed. The proposed carrier recovery circuit uses a reverse-modulation scheme with variable band-width carrier filter. By employing the proposed scheme, the FER (Frame Error Rate) performance is improved by 2dB compared with the differential detection scheme in typical Rayleigh fading environments. An ADPCM voice transmission scheme that employs a click noise suppressor has been also proposed. It achieves a voice quality improvement of 0.5 points in MOS evaluation (3dB improvement in required Eb/No) compared with conventional muting schemes in fading environments.

AB - This paper proposes high-quality signal transmission techniques for personal communication systems. A novel coherent demodulatior - VCHACE, Variable Carrier filter and HAng-up free clock recovery Coherent dEmodulator - has been proposed. The proposed carrier recovery circuit uses a reverse-modulation scheme with variable band-width carrier filter. By employing the proposed scheme, the FER (Frame Error Rate) performance is improved by 2dB compared with the differential detection scheme in typical Rayleigh fading environments. An ADPCM voice transmission scheme that employs a click noise suppressor has been also proposed. It achieves a voice quality improvement of 0.5 points in MOS evaluation (3dB improvement in required Eb/No) compared with conventional muting schemes in fading environments.

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