Title :
LDPC Codes with BDPSK and Differential Detection Over Flat Rayleigh Fading Channels
Author :
Nam, Vu Thanh ; Kam, Pooi Yuen ; Xin, Yan
Author_Institution :
Nat. Univ. of Singapore, Singapore
Abstract :
We derive the correct log-likelihood differential detection metric for iterative decoding of LDPC codes transmitted with BDPSK modulation over Rayleigh fading channels. This metric does not require estimation of the amplitudes of the complex channel gains, showing that existing metrics in the literature that require estimation of amplitudes of channel gains are suboptimum. Simulation results confirm that an intentional SNR underestimation further improves BEP.
Keywords :
Rayleigh channels; differential phase shift keying; iterative decoding; parity check codes; BDPSK modulation; LDPC code; binary differential phase shift keying; flat Rayleigh fading channel; iterative decoding; log-likelihood differential detection metric; AWGN; Amplitude estimation; Channel estimation; Differential quadrature phase shift keying; Fading; Frequency shift keying; Iterative decoding; Parity check codes; Phase shift keying; System performance;
Conference_Titel :
Global Telecommunications Conference, 2007. GLOBECOM '07. IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-1042-2
Electronic_ISBN :
978-1-4244-1043-9
DOI :
10.1109/GLOCOM.2007.615
