Title :
A novel low complexity soft-decision demapper for QPSK 8PSK demodulation of DVB-S2 systems
Author :
Su, Jianing ; Lu, Zhenghao ; Yu, Xiaopeng ; Hu, Changhui
Author_Institution :
Sch. of Electron. & Inf., Soochow Univ., Suzhou, China
Abstract :
This paper provides an efficient low complexity soft-decision demapper algorithm for computing the log-likelihood-ratios (LLRs) of the 8PSK demodulations in the DVB-S2 standard. The proposed method has linear complexity, avoids the multiple square operations in the classical method and reduces the number of compare-select operations by half compared to traditional LLR computation algorithms. The demapper using the proposed method has been verified on Altera FPGA.
Keywords :
digital video broadcasting; field programmable gate arrays; phase shift keying; standards; Altera FPGA; DVB-S2 standard; DVB-S2 systems; LLR; QPSK 8PSK demodulation; classical method; compare-select operations; linear complexity; log-likelihood-ratios; low complexity soft-decision demapper algorithm; multiple square operations; Approximation methods; Complexity theory; Demodulation; Digital video broadcasting; Field programmable gate arrays; Hardware; Silicon; DVB-S2; M-psk; demapper; log-likelihood-ratio; soft-decision;
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2011 International Conference of
Conference_Location :
Tianjin
Print_ISBN :
978-1-4577-1998-1
Electronic_ISBN :
Pending
DOI :
10.1109/EDSSC.2011.6117701
