Performance Comparison of LDPC Codes and Turbo Codes

Jagatheeswari, P.; Rajaram, M.
June 2011
European Journal of Scientific Research;6/ 1/2011, Vol. 54 Issue 3, p465
Academic Journal
Low-density parity-check (LDPC) codes can be considered serious competitors to turbo codes in terms of performance and complexity and they are based on a similar philosophy: constrained random code ensembles and iterative decoding algorithms. In this paper, the LDPC codes are coupled with receive diversity techniques and are employed as the error correction scheme over Additive White Gaussian Channels (AWGN) by employing Binary phase shift keying (BPSK) modulation scheme. The performance of newly obtained codes is evaluated in term of bit error rate (BER) for a given value of Eb/No. Simulation results demonstrate that the bit error rate (BER) performance of the LDPC system is better than Turbo codes and close to that of coherent detection by extending the iterative decoding. In addition, the simulation results show that the LDPC system, which can exploit the receive diversity benefit, has much better performance over additive white Gaussian channels.


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