Error correction method and apparatus

Details Error correction method and apparatus Error correction method and apparatus

1989-05-12

1991-04-23

Smith, Jerry

Excavating

371 381, 371 391, 371 378, G06F 1110, H03M 1300

Patent

active

050105540

ABSTRACT:
For forward error correction, the least significant bit of each multibit symbol is encoded before transmission according to a block code that has an over-all parity bit. Since even syndromes can be produced by only an even number of errors and odd syndromes by an odd number of errors, a Chase decoder at the receiver considers either all double errors or all single errors and all triple errors that include the least reliable symbol in making the corrections to arrive at the most likely transmitted sequence.

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patent: 4763331 (1988-08-01), Matsumoto
patent: 4914660 (1990-04-01), Hirose
G. C. Clark, Jr., and J. B. Cain, "Error-Correction Coding For Digital Communications", Plenum Press, N.Y., pp. 167-172.
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S. I. Sayegh, "A Class of Optimum Block Codes in Signal Space", IEEE Transactions on Communications, vol. Com-34, No. 10, oct. 1986, pp. 1043-1045.
E. L. Cusack (UK), "Error Control Codes for QAM Signalling", Electronics Letters, 19th Jan. 1984, vol. 20, No. 2, pp. 62-63.
G. Ungerboeck, "Channel Coding with Multilevel/Phase Signals", IEEE Transactions on Information Theory, vol. IT-28, No. 1, Jan. 1982, pp. 55-67.
L. F. Wei, "Trellis-Coded Modulation with Multidimensional Constellations", IEEE Transactions on Information Theory, vol. IT-33, No. 4, Jul. 1987, pp. 483-501.

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