Orthogonal Frequency Division Multiplexing (OFDM) is vulnerable with respect to nonlinear distortions caused, for example, by a nonlinear high power amplifier. In the presence of nonlinear high power amplification, OFDM suffers from crosstalk between all subcarriers. Furthermore, the power density spectrum is significantly widened. In this paper, we simultaneously use a memoryless predistorter ...

When is uncoded transmission optimal? This paper derives easy-to-check necessary and suÆcient conditions that do not require nding the rate-distortion and the capacity-cost functions. We consider the symbol-by-symbol communication of discretetime memoryless sources across discrete-time memoryless channels, using single-letter coding and decoding. This is an optimal communication system if and o...