Multilevel codes and multistage decoding for unequal error protection

Author

Isaka, Motohiko ; Imai, Hideki ; Morelos-Zaragoza, Robert H. ; Fossorier, Marc P. C. ; Lin, Shu

Author_Institution

Inst. of Ind. Sci., Tokyo Univ., Japan

fYear

1999

fDate

1999

Firstpage

249

Lastpage

254

Abstract

Multilevel coded modulation with multistage decoding and unequal error protection is discussed. Three types of unconventional partitionings for 8-PSK and 16(64)-QAM constellations with UEP capabilities are analyzed. Based on the tight upper/approximated bounds on bit error probability, it is shown that more degrees of freedom in the construction of multilevel coding and multistage decoding can be accomplished by introducing asymmetries in PSK and QAM signal constellations. Generalizations to other PSK and QAM constellations follow the same lines

Keywords

approximation theory; channel coding; decoding; error correction codes; error statistics; modulation coding; phase shift keying; quadrature amplitude modulation; 16-QAM; 64-QAM; 8-PSK; approximated bounds; bit error probability; degrees of freedom; multilevel coded modulation; multistage decoding; unconventional partitionings; unequal error protection; Bit error rate; Constellation diagram; Decoding; Error correction codes; Error probability; Modulation coding; Nearest neighbor searches; Phase shift keying; Quadrature amplitude modulation; Upper bound;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal Wireless Communication, 1999 IEEE International Conference on

Conference_Location

Jaipur

Print_ISBN

0-7803-4912-1

Type

conf

DOI

10.1109/ICPWC.1999.759626

Filename

759626