Title :
Best mapping for LDPC coded modulation on SISO, MIMO and MAC channels
Author :
Wu, Jianming ; Lee, Heung-No
Author_Institution :
Pittsburgh Univ., PA, USA
Abstract :
Mapping has a significant impact on multilevel modulation schemes. These schemes for conventional codes with iterative demapping and decoding on static channel and Rayleigh fading channel have been studied previously. In this paper, we first investigate the mapping influence on LDPC-code based multilevel modulations on static and Rayleigh fading channels. Then we extend our work to multiple-input multiple-output (MIMO) fading channels and MIMO multiple access channels (MAC). A conclusion can be made as that the Gray map is the best with both iterations and super-iterations for all these channels, which is different from the results of conventional codes.
Keywords :
MIMO systems; Rayleigh channels; iterative decoding; modulation coding; multi-access systems; multipath channels; parity check codes; receiving antennas; transmitting antennas; Gray map; LDPC coded modulation; MAC channel; MIMO; Rayleigh fading channel; SISO; decoding; iterative demapping; multilevel modulation; multiple access channel; multiple-input multiple-output; single-input single-output; static fading channel; Convolutional codes; Fading; Iterative decoding; Iterative methods; MIMO; Modulation coding; Parity check codes; Rayleigh channels; Receiving antennas; Transmitting antennas;
Conference_Titel :
Wireless Communications and Networking Conference, 2004. WCNC. 2004 IEEE
Print_ISBN :
0-7803-8344-3
DOI :
10.1109/WCNC.2004.1311469
