Chapter 5

Optimal Phase Shifters for Peak-to-Average Power Ratio Reduction in Multicarrier Communication Systems

5.1    Background

This chapter describes a method of reducing the peak-to-average power ratio (PAPR) and introduces PAPR-optimal phase shifters for multicarrier communication systems.

One of the important problems inherent in multicarrier communication systems is a need to control and, ultimately, reduce the value of the PAPR. Undesirably high amplitude values of the transmitted signal are typically caused by the closeness of phases of the input components of the multitone transformation module (usually, the inverse discrete Fourier transform [IDFT]) of the transmitter. The solution to this problem should comprise a phase shifter ...

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