Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Patent
1995-04-21
1997-12-02
Tse, Young T.
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
375285, 375295, 375341, 455 68, 455127, 381 77, 395 224, H03M 1312, H04J 1300
Patent
active
056944292
ABSTRACT:
In a mobile radio communication system, at a transmitter side, when a sound-absent section is detected in sound data, transmission of the sound data is stopped, and instead, tail bits are transmitted. A transmission power is lowered to 0 (zero) or a given value other than 0 when the transmission of the tail bits is finished. The lowering of the transmission power is held until a sound-present section is detected. Convolutional encoding is effected to the sound data and the tail bits prior to transmission. At a receiver side, the variation in transmission power is monitored to control an operation of an associated component in response to the monitored power variation. Viterbi decoding is effected for decoding the convolutional code.
REFERENCES:
patent: 5189669 (1993-02-01), Nunokawa
patent: 5535239 (1996-07-01), Padovani et al.
patent: 5559832 (1996-09-01), Laird
patent: 5563908 (1996-10-01), Kaku et al.
patent: 5577087 (1996-11-01), Furuya
ICASSP-89: 1989 International Conference On Acoustics, Speech and Signal Processing, Glasgow, UK, 23.-26.05, 1989, vol. 1, 23 May 1989, IEEE, New York, U.S., pp. 369-372, D.K. Freeman / G. Cosier / C.B. Southcott / I. Boyd, "The Voice Activity Detector For The Pan-European Digital Cellular Mobile Telephone Service".
European Transactions On Telecommunications and Related Technologies, vol. 5, No. 2, March 1994, Milano, Italy, pp. 261-276, L. Hanzo / R. Steel,. "The Pan-European Mobile Radio System. Part II".
1993 43rd IEEE Vehicular Technology Conference, Secaucus, U.S., 18.-20.05, 1993, 18 May 1993, IEEE, New York, U.S., pp 104-107, R. Cox /C.E. W. Sunberg, "A Circular Viterbi Algorithm For Decoding Tailbiting Convolutional Codes".
IEEE Transactions On Communications, vol. Com-34, No. 2, Feb. 1986, New York, U.S., pp. 104-111, H.H. Ma / J.K. Wolf, "On Tail Biting Convolutional Codes".
IEEE Transactions On Communications, vol. Com-38, No. 7, Jul. 1990, New York, U.S., pp. 966-980, J. Hagenauer / N. Seshadri / C.E.W. Sunberg, "The Performance Of Rate-Compatible Punctured Convolutional Codes For Digital Mobile Radio".
TIA/EIA Interim Standard, "Mobile Station-Base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System", Telecommunications Industry Assoc., TIA/EIA/IS-95, Jul. 1993.
"Coding Theory", 1990 Hideki IMAI, Institute of Electronic Communication Information.
Kato Toshio
Kawabe Manabu
Sato Takuro
Sekine Kiyoki
OKI Electric Industry Co., Ltd.
Tse Young T.
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