Performance Analysis of Rayleigh and Rician Channels in Orthogonal Frequency Division Multiplexing

Orthogonal frequency division multiplexing is a extraordinary case of multi-carrier transmission which can support high data rate prerequisite of multimedia based wireless systems. Since evaluation of channel is an vital part of OFDM systems, it is complex to comprehend the basis of channel evaluation techniques for orthogonal frequency division multiplexing scheme, so that the most appropriate technique can be applied. The channel evaluation at pilot frequencies is based on Least Square & Minimum Mean Square Error evaluation method by utilizing modulation scheme such as 16- QAM, Two different channel models such as Rayleigh and Rician will be analyzed on the performance basis to verify the channel response. In this paper we have implemented MATLAB simulation of OFDM to verify how the Bit Error Ratio of a transmission varies when Signal to Noise Ratio (S/N Ratio) and Multi propagation effects are changed on transmission channel.