PAPR REDUCTION USING EFFICIENT PEAK CLIPPING TECHNIQUE IN OFDM SYSTEMS

Sarvjeet Kumar, Shelly Chugh, Jyoti Kohli

Abstract: Orthogonal frequency division multiplexing (OFDM) is the most popular modulation technique which is used for high speed communication system. It provides high spectral efficiency and low implementation complexity. However the main issue of OFDM is its high Peak to Average Power Ratio (PAPR) which results from sum of several sinusoidal signals. So the Efficient Peak Clipping Technique has used to reduce the peak-to-average power ratio (PAPR) of OFDM systems. By introducing different number of Subcarriers N, Up sampling factor k, Number of all samples n, Mapping Order M, and Phase Offset P, a desired level of PAPR has been achieved. At the same time by introducing the proposed technique better tradeoff between BER and SNR has been maintained.

Keywords: Peak-to-average power ratio (PAPR), Signal to noise ratio, (SNR), Complementary cumulative distribution function (CCDF), Bit error rate (BER), Orthogonal frequency division multiplexing (OFDM), Crest factor (CF)

DOI: https://doi.org/10.15623/ijret.2014.0312023