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In this paper we present two results on reducing the peak power of orthogonal frequency division multiplexing (OFDM) symbols via constellation extension (CE). The first result is a derivation of the interior-point method (IPM) algorithm needed to find the optimal distortion set, where the distortion is constrained by convex functions. Next we optimize the parameters of a hybrid CE constraint set to...
Orthogonal frequency division multiplexing (OFDM) systems often have to conform to error vector magnitude (EVM) and spectral mask constraints as specified by communications standards. On the other hand, peak-to-average power ratio (PAR) of the signal waveform is also an important metric that influences the system power efficiency and system performance in the presence of nonlinearities. An interesting...
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