Decoder an decoding method

Details Decoder an decoding method Decoder an decoding method

2006-05-23

2006-05-23

Torres, Joseph (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S795000, C714S780000

Reexamination Certificate

active

07051270

ABSTRACT:
A decoder that receives, as input, probability information AMP/CR×yt. This probability information is obtained by dividing a channel value obtained by multiplication of received value ytand a predetermined coefficient AMP by the first additive coefficient CRfor regulating the amplitude of the received value ytand the probability information 1/CA×APPtobtained by multiplying the a priori probability information APPtby the reciprocal of the second additive coefficient CAfor regulating the amplitude of the a priori probability information APPtto a soft-output decoding circuit. The soft-output decoding circuit, which may be a large scale intergrated circuit, generates log soft-output CI×Iλtand/or external information 1/CA×EXtusing additive coefficients for regulating the amplitude of arithmetic operations in the inside of the soft-output decoding circuit.

REFERENCES:
Papke, L.; Robertson, P.; Villebrun, E.; Improved decoding with the SOVA in a parallel concatenated (Turbo-code) scheme; IEEE International Conference on Communications, vol.: 1; Jun. 23-27, 1996; pp. 102-106.
Weon Yong Joo; Soon Young Yoon; Hwang Soo Lee; A weighted parallel interference cancellation detector for convolutionally coded CDMA systems; IEEE 51st Vehicular Technology Conference Proceedings; vol.: 2; May 15-18, 2000; pp.: 1100-1104.
Yano, et al., “Sub-log-MAP wo Tekiyou shita Tubro Fugou no Nan-hantei Bit no Kentou,” Densi Joho Tsuushin Gakai Gijutsu Kenkyuu Houkoku, Denshi Joho Tsuushi Gakkai, vol. 99, No. 142, Jun. 25, 1999, pp. 7-12.

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