Title :
An Enhanced Soft Value Calculation for LDPC Coded Pulse-Position-Modulation
Author :
Wu, Yongsheng ; Yang, Aiying ; Sun, Yu-nan ; Yang, Chunxue
Author_Institution :
Dept. of Opto-Electron. Eng., Beijing Inst. of Technol., Beijing, China
fDate :
5/1/2012 12:00:00 AM
Abstract :
In this letter, a simplified soft value extraction algorithm for LDPC coded PPM modulated signals is presented. The Monte Carlo simulations are applied to get the BER curves of the system based on the simplified AWGN channel. Through rearranging the soft value by the exponential function, we get an even better performance of the system.
Keywords :
AWGN channels; Monte Carlo methods; channel coding; error statistics; modulation coding; parity check codes; pulse position modulation; BER curves; LDPC coded PPM modulated signals; LDPC coded pulse-position-modulation; Monte Carlo simulations; additive white Gaussian noise channel; enhanced soft value calculation; exponential function; low density parity check codes; simplified AWGN channel; simplified soft value extraction algorithm; Adaptive optics; Bit error rate; Modulation; Optical pulses; Optical transmitters; Parity check codes; Signal to noise ratio; Pulse position modulation (PPM); additive white Gaussian noise (AWGN); belief propagation (BP) algorithm; low density parity check (LDPC) codes;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.030912.112351
