Method and apparatus for using orthogonal coding in a communicat

Details Method and apparatus for using orthogonal coding in a communicat Method and apparatus for using orthogonal coding in a communicat

1992-02-19

1993-04-20

Cain, David

Pulse or digital communications

Repeaters

Testing

380 28, H04K 100

Patent

active

052048748

ABSTRACT:
A method and apparatus is provided for encoding and decoding. In encoding, bits (202) are encoded (204) into symbols (206) such that maximum likelihood decoding is facilitated. Groups of symbols (206) are translated by either interleaving by group each group within a block (208) and subsequently deriving an orthogonal code from each group (212) or deriving an orthogonal code from each group and subsequently interleaving by code each code within a block. In decoding, groups of samples (228, 229) are transformed by either generating metrics and index symbols (242) for each group of samples (232, 234, 236, 238, 240) and subsequently deinterleaving by group each group of metrics within a block (244) or deinterleaving by group each group of samples within a block and subsequently generating metrics and index symbols for each deinterleaved group of samples. Each metric represents the confidence that a group of samples is a particular orthogonal code. Subsequently, maximum likelihood decoding (266) generates an estimated bit (268) from the index symbols and metrics (260).

REFERENCES:
patent: 4208739 (1980-06-01), Lu et al.
patent: 4811357 (1989-03-01), Betts et al.
patent: 4896353 (1990-01-01), Dehgani et al.
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 5054066 (1991-10-01), Riek et al.
patent: 5056105 (1991-10-01), Darmon et al.
patent: 5101501 (1992-03-01), Gilhousen et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
Dixon, Robert C., Spread Spectrum Systems 2nd Ed., John Wiley & Sons, New York, NY, 1984 Chapters 1 & 2, pp. 1-55.
Sklar, Bernard, Digital Communications: Fundamentals and Applications, Prentice Hall, Englewood Cliffs, N.J., 1988, Chapters 5 & 6 pp. 245-380.
"Two Classes of Convolutional Codes Over GF(q) for q-ary Orthogonal Signaling", William E. Ryan and Stephen G. Wilson, IEEE Transactions on Communications, vol. 39, No. 1 (Jan. 1988), pp. 30-40.
"On the System Design Aspects of Code Division Multiple Access (CDMA) Applied to Digital Cellular and Personal Communications Networks", Allen Salmasi and Klein S. Gilhousen, Proceedings of 41st Vehicular Technology Conference in St. Louis, Mo., May 19-22, 1991, pp. 57-62.
"Performance of Convolutional Codes with Interleaving in the Interference Limited Rayleigh Fading Channel", Li Fung Chang and Sirikiat Ariyavisitakul, Proceedings of 41st Vehicular Technology Conference in St. Louis, Mo., May 19-22, 1991, pp. 812-816.

Affiliated with

Also associated with

Rating

Method and apparatus for using orthogonal coding in a communicat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for using orthogonal coding in a communicat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for using orthogonal coding in a communicat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1530913