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Performance Comparison of μ −Law and Exponential Companding Algorithms in OFDM System

ABSTRACT : Orthogonal Frequency division multiplexing (OFDM) is a very attractive technique in wireless communications which provides robustness to channel fading and immunity to impulse interference. Despite of its advantages, one of the major drawbacks of OFDM system is very high peak-to-average power ratio (PAPR). Among the various PAPR reduction techniques, companding appears attractive for its simplicity and effectiveness. In this paper, comparison of companding algorithm such as μ-law and exponential based on the bit error rate and signal to noise ratio is evaluated.