Comparative analysis of various channel estimations under different modulation schemes

OFDM is being widely used in wireless communication systems for its ability to reduce the bandwidth and enhance the data rate. The scheme provides robustness against interference and can adapt easily to fading scenarios. This paper gives a comparison of channel performance using various modulation techniques over different fading environments. Modulation schemes include BPSK, QPSK, 64-QAM which have been employed under the influence of AWGN, Rayleigh, flat fading, frequency selective and Rician fading channels. BER (Bit Error Rate) and SNR (Signal to Noise ratio) functions are used to analyze the performance of data transmitted over these channels.