Title :
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
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;
Conference_Titel :
Personal Wireless Communication, 1999 IEEE International Conference on
Conference_Location :
Jaipur
Print_ISBN :
0-7803-4912-1
DOI :
10.1109/ICPWC.1999.759626
