System Model Performance Coupled with DPSK Modulation over Flat Rayleigh Fading Channels

In this paper performance enhancement of the system has been investigated by employing large girth Quasi-Cyclic low-density parity-check (QC-LDPC) codes as forward error correction code, coupled with differential phase shift keying (DPSK) over Rayleigh fading channels. Performance of the system is evaluated by measuring bit error rate (BER) for a given value of . Simulation results at diversity level L=4 have confirmed the robustness of the system with a gain of about 1.5 dB as compared to the results of known differential detection system over Rayleigh Fading Channels at a BER of10^-5 .

[1]  D.J.C. MacKay,et al.  Good error-correcting codes based on very sparse matrices , 1997, Proceedings of IEEE International Symposium on Information Theory.

[2]  G. Caire,et al.  On the capacity of some channels with channel state information , 1998, Proceedings. 1998 IEEE International Symposium on Information Theory (Cat. No.98CH36252).

[3]  Stephen G. Wilson,et al.  LDPC Coded M-ary Orthogonal Signaling with Noncoherent Detection , 2005 .

[4]  Othman Sidek,et al.  Row Division Method to Generate QC-LDPC Codes , 2009, 2009 Fifth Advanced International Conference on Telecommunications.

[5]  Pooi Yuen Kam,et al.  LDPC Codes with BDPSK and Differential Detection Over Flat Rayleigh Fading Channels , 2007, IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference.

[6]  Cyril Leung,et al.  Performance of frequency-hopping multicarrier CDMA on an uplink with correlated Rayleigh fading , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).

[7]  A. Glavieux,et al.  Near Shannon limit error-correcting coding and decoding: Turbo-codes. 1 , 1993, Proceedings of ICC '93 - IEEE International Conference on Communications.

[8]  Naresh Sharma,et al.  LDPC Codes for Flat Rayleigh Fading Channels with Channel Side Information , 2008, IEEE Transactions on Communications.

[9]  Robert G. Gallager,et al.  Low-density parity-check codes , 1962, IRE Trans. Inf. Theory.

[10]  Matthew C. Valenti,et al.  Iterative channel estimation and decoding of pilot symbol assisted turbo codes over flat-fading channels , 2001, IEEE J. Sel. Areas Commun..

[11]  Hideki Ochiai,et al.  On the Performance of LDPC Codes with Differential Detection over Rayleigh Fading Channels , 2006, 2006 IEEE 63rd Vehicular Technology Conference.