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In this paper, an adaptive step size algorithm is proposed to reduce peak-to-average power ratio (PAR) of OFDM signals. The error vector magnitude (EVM) and spectral mask constraints are considered. Unlike the existing cognitive clipping method, the proposed scheme adjusts the EVM threshold with adaptive step size, which is proportionate to the ratio(More)
The effect of amplifier nonlinearity is analyzed for M-QAM full-duplex communications in additive white Gaussian noise channels. Two classical memoryless nonlinear amplifier models, i.e., a traveling-wave tube amplifier and a solid-state power amplifier, are considered. An analytical expression for the bit error ratio is derived using a characteristic(More)
Considering the joint algorithm of coherent detection and non-coherent detection, we focus on the maximum processing gain of spreading signal, which is 2-dimensional spread spectrum signal, relative to binary phase shift keying (BPSK) and transmitted in rich scattering multipath fading channels. In this paper, we first investigate the processing gain of(More)
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