Performance Evaluation of LDPC and Turbocoded OFDM System in Nakagami-M Fading

Abstract

In this paper, the performance analysis of OFDM based system using turbo and LDPC coding technique is presented under Nakagami-m fading channel. Nakagami-m is very recent and useful tool to evaluate the channel performance for OFDM system. The optimum value of parameter m = 1.4 is used in this paper. Here comparative analysis of turbo coding and LDPC coding schemes shows that error performance of LDPC is much better as compared to turbo codes. Both coding scheme revels the enhancement in BER performance in Nakagami-m channel.

Bit Error Optimization of Coded Ofdm System Over Rayleigh Fading Channel

“…The task of the encoder is then to produce the codeword for the data word by computing the parity matrix P [10].…”

“…In [9], a combination between QC-LDPC and MIMO OFDM scheme is proposed to reduce the Peak Average Power Ratio (PAPR) which is considered one of the challenges in the OFDM systems. In paper [10], the researcher presents a comparative analysis between turbo code and LDPC code over Nakagami channel. The simulation results show that the performance of LDPC is much better than that of turbo code.…”