Title :
Quantization of signals and metrics in the decoding of 8-PSK TCM
Author :
Ross, Michael D. ; Osborne, W.P.
Author_Institution :
Manuel Lujan Jr. Center for Space Telemetering, New Mexico State Univ., Las Cruces, NM, USA
Abstract :
The performance of rate 2/3 8-PSK Trellis Coded Modulation was investigated as a function of the numerical resolution of the metrics and signal vectors used in decoding by the Viterbi algorithm. It was found that a 16 state Ungerboeck code using 5 bit I and Q with 7 bit metrics achieved roughly the same performance as pragmatic TCM. The findings were applied to the digital logic design of a TCM decoder
Keywords :
Viterbi decoding; phase shift keying; quantisation (signal); trellis coded modulation; 16 state Ungerboeck code; 7 bit metrics; 8-PSK TCM decoding; TCM decoder; Viterbi algorithm; digital logic design; numerical resolution; pragmatic TCM; rate 2/3 8-PSK Trellis Coded Modulation; signal quantization; signal vectors; Constellation diagram; Decoding; Degradation; Extraterrestrial measurements; Hardware; Logic design; Modulation coding; Phase shift keying; Quantization; Viterbi algorithm;
Conference_Titel :
Computers and Communications, 1995., Conference Proceedings of the 1995 IEEE Fourteenth Annual International Phoenix Conference on
Conference_Location :
Scottsdale, AZ
Print_ISBN :
0-7803-2492-7
DOI :
10.1109/PCCC.1995.472431
