Radio telecommunications system operative by interactive...

Details Radio telecommunications system operative by interactive... Radio telecommunications system operative by interactive...

2007-07-24

2007-07-24

Payne, David C. (Department: 2611)

Pulse or digital communications

Transmitters

Angle modulation

C332S103000, C375S260000, C375S269000, C370S334000, C455S500000, C455S103000

Reexamination Certificate

active

10643182

ABSTRACT:
A system to communicate digital data symbols with higher than QPSK modulation comprises a transmitter and receiver. The transmitter comprises, a modulator and circuitry to split and encode the data into a first block of more significant bits and a second block of less significant bits for modulating by. The receiver receives digital data bits by iterative determination of soft estimates of bits followed by a hard decision as to what bit was intended, and comprises a first processor to provide first soft estimates of bits of the received signal, and a second processor to decode the first soft estimates and to provide second soft estimates of the bits. The receiver also comprises a first combiner to provide adapted first soft estimates to the second processor, the adapted first soft estimates of each bit being dependent upon the respective first soft estimate and a respective previous first soft estimate, and a second combiner to provide third soft estimates back to the first processor for subsequent further decoding, the third soft estimates of each bit being dependent upon the respective second soft estimate and a respective previous second soft estimate.

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Isaka, M. et al: “On the Interactive Decoding of Multilevel Codes”, IEEE Journal of Selected Areas in Communications, IEEE Inc. New York, U.S., vol. 19, No. 5, May 2001 pp. 935-943, XP001101013 ISSN: 0733-8716.
Tonello, A. M.: “Space-Time Bit-Interleaved Coded Modulation Over Frequency Selective Fading Channels with Interactive Decoding”, Globecom'00. 2000 IEEE Global Telecommunications Conference. San Francisco, CA , Nov. 27, 2000-Dec. 1, 2000, IEEE Global Telecommunications Conference, New York, NY: IEEE, U.S. vol. 3 of 3, Nov. 27, 2000, pp. 1616-1620, XP002180266 ISBN: 0-7803-6452-X.
Li, X. et al: “Effects of Interactive Detection and Decoding on the Performance of Blast”, Globecom'00. 2000 IEEE Global Telecommunications Conference, San Francisco, CA, Nov. 27, 2000-Dec. 1, 2000, IEEE Global Telecommunications Conference, New York, NY: IEEE, U.S., vol. 2 of 4, Nov. 27, 2000, pp. 1061-1066, XP001017247 ISBN: 0-7803-6452-X.

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