Title :
On the Performance of LDPC Codes with Differential Detection over Rayleigh Fading Channels
Author :
Tatsunami, Hiroshi ; Ishibashi, Koji ; Ochiai, Hideki
Author_Institution :
Div. of Phys., Electr. & Comput. Eng., Yokohama Nat. Univ.
Abstract :
In this paper, the performance of low-density parity-check (LDPC) codes with differential detection is studied over additive white Gaussian noise (AWGN) and Rayleigh fading channels with particular emphasis on the sensitivity of signal-to-noise ratio (SNR) parameters required for metric calculation. Two simple metrics are derived and compared. Computer simulation results demonstrate that an SNR mismatch has a considerable effect on the performance of LDPC codes, and optimal SNR mismatches are explored in terms of bit error rate performances. It is shown that in some cases a pessimistic SNR estimation can improve the overall performance
Keywords :
AWGN channels; Rayleigh channels; differential detection; error statistics; mobile radio; parity check codes; AWGN channels; LDPC codes; Rayleigh fading channels; SNR mismatch; additive white Gaussian noise channels; bit error rate; differential detection; low-density parity-check codes; signal-to-noise ratio; AWGN; Additive white noise; Decoding; Detectors; Differential quadrature phase shift keying; Fading; Gaussian noise; Parity check codes; Signal to noise ratio; Turbo codes;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2006.1683285
