Performance Comparison of Uncoded OFDM & Uncoded Adaptive OFDM System Over AWGN Channel

摘要

Adaptive OFDM (AOFDM) is the important approach to fourth generation of mobile communication. Adaptive modulating scheme is employed according to channel fading condition for improving the performance of OFDM. This gives improved data rate, spectral efficiency & throughput. OFDM is flexible to adapt modulation schemes on subcarriers according instantaneous signal-to-noise ratio (SNR). In this paper, we compare Bit Error Rate (BER), Mean Square Error(MSE), Spectral Efficiency, Throughput performance of uncoded OFDM & uncoded adaptive OFDM with BPSK,QPSK & QAM modulation over AWGN channel.