Title :
Multistage decoding of multilevel block M-PSK modulation codes and its performance analysis
Author :
Takata, Toyoo ; Ujita, Satoshi ; Kasami, Tadao ; Lin, Shu
Author_Institution :
Graduate Sch. of Inf. Sci., Adv. Inst. of Sci. & Technol., Nara, Japan
fDate :
7/1/1993 12:00:00 AM
Abstract :
Multistage decoding of multilevel block multilevel phase-shift keying (M-PSK) modulation codes for the additive white Gaussian noise (AWGN) channel is investigated. Several types of multistage decoding, including a suboptimum soft-decision decoding scheme, are devised and analyzed. Upper bounds on the probability of an incorrect decoding of a code are derived for the proposed multistage decoding schemes. Error probabilities of some specific multilevel block 8-PSK modulation codes are evaluated and simulated. The computation and simulation results for these codes show that with multistage decoding, significant coding gains can be achieved with large reduction in decoding complexity. In one example, it is shown that the difference in performance between the proposed suboptimum multistage soft-decision decoding and the single-stage optimum decoding is small, only a fraction of a dB loss in SNR at the block error probability of 10-6
Keywords :
block codes; decoding; error statistics; phase shift keying; telecommunication channels; white noise; 8-PSK; AWGN channel; M-PSK modulation codes; additive white Gaussian noise; coding gains; error probability; multilevel block multilevel phase-shift keying; multistage decoding; performance analysis; suboptimum soft-decision decoding; upper bounds; AWGN; Additive white noise; Computational modeling; Decoding; Error probability; Modulation coding; Performance loss; Phase modulation; Phase shift keying; Upper bound;
Journal_Title :
Information Theory, IEEE Transactions on
