DEVICE AND METHOD FOR REDUCING BIT ERROR COEFFICIENTS AND FRAME ERROR COEFFICIENTS USING TURBO-DECODING IN DIGITAL COMMUNICATION SYSTEM

摘要

FIELD: advanced correction of bit and frame error coefficients using turbo-decoding in communication system. ^ SUBSTANCE: proposed device has composite turbo-code decoder incorporating first adder that computes logarithmic ratio of received code character similarity by calculating difference between character probability equal to 1 and character probability equal to 0 in arbitrary state of turbo-coding lattice; second adder that functions to add transfer information and a priori code character information; third adder that computes difference between outputs of first and second adders as peripheral information; first multiplier that multiplies result obtained from output of third adder by predetermined weighting coefficient; correcting value computer that computes correcting value using difference between best metric and second best metric of code character; fourth adder that adds correcting value to result obtained from first multiplier output. ^ EFFECT: improved turbo-decoding algorithm using less intricate hardware. ^ 8 cl, 16 dwg