Paper Info
Title
Efficient soft demodulation scheme for digital video broadcasting via satellite - Second generation system
Abstract
In this study, the authors propose a compact soft demodulation method for M-ary modulation schemes defined in the Digital Video Broadcasting via Satellite - Second Generation (DVB-S2) system. They first derive a conventional soft demodulation method for quadrature phase shift keying and 8-ary phase shift keying with a linear order of complexity, and apply this to the modulation schemes defined in DVB-S2. In particular, they propose a new constellation for 32-ary amplitude and phase shift keying (32-APSK), which provides better performance, regardless of the soft demodulation scheme. In addition, the proposed constellation enables us to apply a very simple and efficient soft demodulation method. The proposed soft demodulation method estimates the soft information by simple distance calculation, and greatly reduces the computational complexity, compared with maximum-log-likelihood detection. They demonstrate the bit error rate (BER) performance of various soft demodulation methods, combined with the low density parity check codes specified in DVB-S2. The BER simulation results reveal that the proposed constellation for 32-APSK can achieve better performance than the conventional one, regardless of the soft demodulation method. In addition, the proposed soft demodulation method can highly reduce the computational complexity, with reasonable performance degradation.
Year
DOI
Venue
2014
10.1049/iet-com.2013.0307
IET Communications
Keywords
DocType
Volume
demodulation,32-ary amplitude and phase shift keying,soft demodulation method,bit error rate performance,32-APSK,low density parity check codes,second generation system,soft information,digital video broadcasting via satellite,DVB-S2 system,quadrature phase shift keying,direct broadcasting by satellite,distance calculation,quadrature amplitude modulation,BER simulation,digital video broadcasting,M-ary modulation,parity check codes,8-ary phase shift keying
Journal
8
Issue
ISSN
Citations 
1
1751-8628
1
PageRank 
References 
Authors
0.36
0
2
Name
Order
Citations
PageRank
Meixiang Zhang1228.57
Sooyoung Kim222538.24