Title :
Constellation mappings for two-dimensional non-uniform signaling
Author :
Takahara, Glen ; Alajaji, Fady ; Kuai, Hongyan ; Beaulieu, Norman C.
Author_Institution :
Dept. of Math. & Stat., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
We investigate the design of constellation mappings for the transmission of nonuniform memoryless sources over AWGN channels via M-ary modulation schemes. We show that constellation mappings which minimize the average symbol energy and, given this, maximize the decoding probability of the most likely signals, can yield SER and BER performance that is better than Gray encoding maps. We also find that for highly non-uniform sources, 16-QAM can perform better than 2-QAM, in terms of both throughput and BER
Keywords :
AWGN channels; decoding; error statistics; memoryless systems; quadrature amplitude modulation; telecommunication signalling; 16-QAM; 2-QAM; 2D nonuniform signaling; AWGN channels; BER performance; Gray encoding maps; M-ary modulation; MAP decoding; SER performance; average symbol energy minimization; constellation mappings; decoding probability; nonuniform memoryless sources; nonuniform sources; source transmission; throughput; two-dimensional nonuniform signaling; AWGN channels; Bit error rate; Constellation diagram; Decoding; Error analysis; Mathematics; Redundancy; Signal mapping; Statistics; Throughput;
Conference_Titel :
Information Theory, 2000. Proceedings. IEEE International Symposium on
Conference_Location :
Sorrento
Print_ISBN :
0-7803-5857-0
DOI :
10.1109/ISIT.2000.866460
