Title :
Improvements to APSK constellation with gray mapping
Author :
Dazhi He ; Yijun Shi ; Yunfeng Guan ; Yin Xu ; Yao Wang ; Wenjun Zhang ; Honggang Yin
Author_Institution :
Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
Amplitude phase shift keying (APSK) constellation with gray mapping proposed in [2] provides considerable shaping gain compared with quadrature amplitude modulation (QAM). In this paper, some improvements to APSK Constellation with gray mapping are addressed. AP-SK constellation with gray mapping could be adjusted according to different SNR levels to increase its average mutual information (AMI). Two methods to improve AMI, on phase and on amplitude, are proposed. Both AMI of coded modulation (CM-AMI) and AMI of bit-interleaved coded modulation (BICM-AMI) are considered. The improvements are verified by bit error rate simulations in both independent and iterative demapping scenarios.
Keywords :
iterative methods; modulation coding; phase shift keying; APSK constellation; BICM-AMI; CM-AMI; QAM; SNR levels; amplitude phase shift keying constellation; average mutual information; bit-interleaved coded modulation; coded modulation; gray mapping; iterative demapping scenarios; quadrature amplitude modulation; shaping gain; Bit error rate; Digital video broadcasting; Parity check codes; Phase shift keying; Quadrature amplitude modulation; Signal to noise ratio; APSK; BICM-AMI; CM-AMI; modulation; signal processing for transmission;
Conference_Titel :
Broadband Multimedia Systems and Broadcasting (BMSB), 2014 IEEE International Symposium on
Conference_Location :
Beijing
DOI :
10.1109/BMSB.2014.6873488
