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, Shuji Kubota, S. Kato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

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.

Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference
Editors Anon
PublisherIEEE
Pages733-737
Number of pages5
Volume2
Publication statusPublished - 1995
Externally publishedYes
EventProceedings of the 1995 IEEE 45th Vehicular Technology Conference. Part 2 (of 2) - Chicago, IL, USA
Duration: 1995 Jul 251995 Jul 28

Other

OtherProceedings of the 1995 IEEE 45th Vehicular Technology Conference. Part 2 (of 2)
CityChicago, IL, USA
Period95/7/2595/7/28

Fingerprint

Speech transmission
Personal communication systems
Demodulation
Recovery
Demodulators
Rayleigh fading
Processing
Clocks
Modulation
Bandwidth
Networks (circuits)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Kobayshi, K., Sakata, T., Matsumoto, Y., Enomoto, K., Kubota, S., & Kato, S. (1995). High-quality signal transmission techniques for personal communication systems - novel coherent demodulation and ADPCM voice transmission with click noise processing-. In Anon (Ed.), IEEE Vehicular Technology Conference (Vol. 2, pp. 733-737). IEEE.

High-quality signal transmission techniques for personal communication systems - novel coherent demodulation and ADPCM voice transmission with click noise processing-. / Kobayshi, K.; Sakata, T.; Matsumoto, Y.; Enomoto, K.; Kubota, Shuji; Kato, S.

IEEE Vehicular Technology Conference. ed. / Anon. Vol. 2 IEEE, 1995. p. 733-737.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kobayshi, K, Sakata, T, Matsumoto, Y, Enomoto, K, Kubota, S & Kato, S 1995, High-quality signal transmission techniques for personal communication systems - novel coherent demodulation and ADPCM voice transmission with click noise processing-. in Anon (ed.), IEEE Vehicular Technology Conference. vol. 2, IEEE, pp. 733-737, Proceedings of the 1995 IEEE 45th Vehicular Technology Conference. Part 2 (of 2), Chicago, IL, USA, 95/7/25.
Kobayshi K, Sakata T, Matsumoto Y, Enomoto K, Kubota S, Kato S. High-quality signal transmission techniques for personal communication systems - novel coherent demodulation and ADPCM voice transmission with click noise processing-. In Anon, editor, IEEE Vehicular Technology Conference. Vol. 2. IEEE. 1995. p. 733-737
Kobayshi, K. ; Sakata, T. ; Matsumoto, Y. ; Enomoto, K. ; Kubota, Shuji ; Kato, S. / High-quality signal transmission techniques for personal communication systems - novel coherent demodulation and ADPCM voice transmission with click noise processing-. IEEE Vehicular Technology Conference. editor / Anon. Vol. 2 IEEE, 1995. pp. 733-737
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