A Novel Approach to Reduce the PMEPR of MCPC Signal using Random Phase Algorithm

Raghavendra CG

Abstract


This paper aims to reduce the Peak-to-Mean Envelope Power Ratio (PMEPR) of a Multicarrier Complementary Phase Coded (MCPC) signal. A MCPC signal consists of P subcarriers which are phase modulated by N distinct phase sequences. Each of these P subcarriers is spaced 1/tb apart from each other, where tb is the duration of each phase elemebbnt, constituting an Orthogonal Frequency Division Multiplexing (OFDM) signal. A probabilistic approach, namely, Random Phase Updating (RPU) algorithm, is used to reduce the PMEPR of the generated MCPC signal. The technique is applied to higher order MCPC signals and a comparison of the peak sidelobe ratio (PSLR) and integrated sidelobe ratio (ISLR) is performed. The complex envelopes, autocorrelations and ambiguity functions of the MCPC signal obtained by the above mentioned methods are analysed. The Complementary Cumulative Distribution Function (CCDF) is plotted to validate the PMEPR reduction obtained by the application of the RPU algorithm which enables us to determine the most suitable approach required for radar applications.


Keywords


Multicarrier Complementary Phase Coded (MCPC), Orthogonal Frequency Division Multiplexing (OFDM), Peak to Mean Envelope Power Ratio (PMEPR), Peak Sidelobe Ratio (PSLR), Random Phase Updating (RPU)

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