Mobility

MC CDMA PAPR Reduction Using Discrete Logarithmic Method

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Executive Summary

High Peak to Average Power Ratio (PAPR) of the transmitted signal deteriorates Multi-Carrier Code Division Multiple Access (MC CDMA) system performance, due to large number of subcarriers. This paper proposes a new technique to reduce PAPR of MC CDMA signal using Discrete Logarithm Method (DLM). Simulation results indicate reduction of PAPR by more than 5.0dB without increasing BER. Discrete Logarithmic Method (DLM) has earlier been used in cryptography. If an air interface is used as a communication channel, the information of the communication may be exposed to an eavesdropper or system services can be fraudulently altered. In order to have good security over wireless channel, the DLM is proposed for MC CDMA PAPR reduction and security measures.

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