Patent Number: 6,298,461

Title: Encoding and decoding methods and apparatus

Abstract: An encoder for a wideband CDMA communications system comprises an outer Reed-Solomon code encoder and an inner parallel concatenated convolutional code (PCCC) or turbo code encoder. An iterative PCCC decoder, for decoding the inner code, includes summing functions in forward and feedback paths for producing extrinsic information to enhance soft decoding decisions by first and second decoders in successive decoding iterations. An outer code decoder connected following the PCCC decoder also can provide serial feedback information for enhancing iterative decisions by the PCCC decoder.

Inventors: Tong; Wen (Ottawa, CA), Wang; Rui (Ottawa, CA), Kreindeline; Vitali B. (Moskva, RU), Bakouline; Mikhail G. (Moskovskaja, RU), Chloma; Alexandre M. (Koskovskaja, RU), Shinakov; Yuri S. (Moscow, RU)

Assignee: Nortel Networks Limited

International Classification: H03M 13/00 (20060101); H03M 13/45 (20060101); H03M 13/29 (20060101); H03M 013/00 ()

Expiration Date: 10/02/2018