Title :
Maximum Likelihood Decoding of Low Density Parity Check Coded Subcarrier Modulation in Optical Wireless Systems
Author :
Sharma, Manish ; Chadha, D.
Author_Institution :
Indian Inst. of Technol. Delhi, New Delhi
Abstract :
We propose low density parity check (LDPC) coded optical wireless communication systems with multiple subcarrier modulation (BPSK and QPSK). Upper bounds on the bit-error rate (BER) for maximum likelihood (ML) decoding of LDPC coded systems have been obtained on atmospheric optical channels where the effects of the scintillation exist. We also show that LDPC coded atmospheric optical systems have better BER than turbo coded atmospheric optical systems
Keywords :
atmospheric optics; error statistics; maximum likelihood decoding; modulation; optical communication; parity check codes; scintillation; LDPC; atmospheric optical channel; error statistics; low density parity check code; maximum likelihood decoding; multiple subcarrier modulation; optical wireless system; scintillation effect; Binary phase shift keying; Bit error rate; Maximum likelihood decoding; Modulation coding; Optical modulation; Parity check codes; Quadrature phase shift keying; Turbo codes; Upper bound; Wireless communication; Atmospheric turbulence; Block codes; Free Space Optical communication; Low density Parity Check Codes; Maximum Likelihood decoding; Multiple Subcarrier Modulation;
Conference_Titel :
India Conference, 2006 Annual IEEE
Conference_Location :
New Delhi
Print_ISBN :
1-4244-0369-3
Electronic_ISBN :
1-4244-0370-7
DOI :
10.1109/INDCON.2006.302762
