On multilevel trellis MPSK codes

Author

Jiantian Wu ; Costello, D.J., Jr. ; Perez, L.C.

Author_Institution

Universitv of Notre Dame

fYear

1991

fDate

24-28 June 1991

Firstpage

145

Lastpage

145

Abstract

The performance of multilevel trellis codes (MLTCs) using MPSK signalling with multistage decoding (MSD) is studied. It is shown that 8PSK codes can only achieve a real coding gain of 4dB over uncoded QPSK at a bit error rate (BER) of 10^-5. However, multistage decoding has a significant complexity advantage compared to Viterbi decoding which is used with one level trellis coded modulation (TCM). It is shown that some 8PSK MLTCs with high spectral efficiency (about 2.5 bits/symbol) and moderate coding gain have a performance versus complexity advantage over one level TCM even at a BER of 10^-5. Computer simulations support this result. Simulation is also used to study the performance loss due to the suboptimal nature of MSD. Concatenated multilevel codes are designed by using concatenated codes at one or more levels of the MLTC.

Keywords

Bit error rate; Computer simulation; Concatenated codes; Convolutional codes; Decoding; Modulation coding; Performance gain; Performance loss; Quadrature phase shift keying; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory, 1991 (papers in summary form only received), Proceedings. 1991 IEEE International Symposium on (Cat. No.91CH3003-1)

Conference_Location

Budapest, Hungary

Print_ISBN

0-7803-0056-4

Type

conf

DOI

10.1109/ISIT.1991.695201

Filename

695201