Title :
Efficient soft demapping for M-ary APSK
Author :
Zhang, Meixiang ; Kim, Sooyoung
Author_Institution :
Chonbuk Nat. Univ., Jeonju, South Korea
Abstract :
In this paper, we present an efficient soft demapping method for M-ary APSK based on hard decision thresholds (HDT). The proposed scheme is of great reducing in computational complexity compared to maximum likelihood detection (MLD) using log likelihood ratio (LLR) and Max LLR. We demonstrate the bit error rate (BER) performance of various soft demapping methods combined with turbo codes. The BER simulation results reveal that the proposed method can achieve almost approximating performance to MLD.
Keywords :
computational complexity; error statistics; phase shift keying; turbo codes; M-ary APSK; bit error rate performance; computational complexity; hard decision threshold; max log likelihood ratio; soft demapping; turbo codes; Bit error rate; Channel coding; Computational complexity; Digital video broadcasting; Estimation; Modulation; APSK; DVB-S2; iterative decoding; soft demapping;
Conference_Titel :
ICT Convergence (ICTC), 2011 International Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4577-1267-8
DOI :
10.1109/ICTC.2011.6082677
