Title :
Efficient BER computation of LDPC coded SC/MRC systems over Rayleigh fading
Author :
Tan, Beng Soon ; Li, Kwok Hung ; Teh, Kah Chan
Author_Institution :
Sch. of EEE, Nanyang Technol. Univ., Singapore, Singapore
Abstract :
Selection combining cascaded with maximum-ratio combining (SC/MRC), which is particularly useful when site diversity is available, combined with low-density parity-check (LDPC) codes is able to combat the effects of fading. The bit-error rate (BER) expressions of uncoded SC/MRC and SC/MRC with LDPC codes over an independent and identically distributed Rayleigh-fading channel are derived based on the Gaussian approximation approach. These expressions are also applicable to the selection combining and maximum-ratio combining as special cases. The derived expressions are in good agreement with simulation results and approach the density evolution (DE) thresholds. These expressions are able to achieve a significant reduction in computational time with a reasonable accuracy for analyzing the BER performance as compared to simulations and DE.
Keywords :
Gaussian channels; Rayleigh channels; diversity reception; error statistics; parity check codes; BER computation; Gaussian approximation approach; LDPC coded SC/MRC systems; Rayleigh fading; bit-error rate; distributed Rayleigh-fading channel; low-density parity-check codes; maximum-ratio combining; selection combining; site diversity; Bit error rate; Diversity reception; Gallium; Parity check codes; Rayleigh channels; Signal to noise ratio;
Conference_Titel :
Signal Processing and Communication Systems (ICSPCS), 2010 4th International Conference on
Conference_Location :
Gold Coast, QLD
Print_ISBN :
978-1-4244-7908-5
Electronic_ISBN :
978-1-4244-7906-1
DOI :
10.1109/ICSPCS.2010.5709680
