Performance Analysis of Reed Solomon Code for various Modulation Schemes over AWGN Channel

The main objective of this paper is to analyse the performance of Reed-Solomon code for different digital modulation schemes and with different (n,k) combinations over a Additive White Guassian Noise (AWGN) channel. The simulation model provides error detection and correction using ReedSolomon (RS) Code. The Original message is encoded and decoded using RS Code. MATLAB Simulink model is selected as the investigating tool. The performance of proposed GMSK and RS code combination for different code rates and different BT product is compared with un coded system with the constraint that the transmission bandwidth is constant .It has been observed that varying BT values in GMSK modulation for fixed (n,k) combination produces no significant effect over BER The results are presented by a plot between the bit error rate (BER) and signal to noise ratio .The results show that for a given bandwidth, it is beneficial to use GMSK modulation scheme with (63,k) code rate over other modulation schemes so as to obtain least BER for different signal to noise values. Same time it has been observed that performance of GMSK Modulation lies in between other modulation schemes for other (n,k) combinations. The BER performance also improves by decreasing code rate and by taking large block lengths or by increasing redundancy.