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High power and spectral efficiencies are crucial on modern wireless communications. M-QAM (Quadrature Amplitude Modulation) modulations have been adopted on HSDPA (High Speed Downlink Packet Access) and satellite links, due his higher spectral efficiency. However, due to large envelope fluctuations levels, nonlinear operations such as an high power amplification are undesirable since can they lead...
Nonlinear operations are usually regarded as something undesirable that should be avoided in digital communication systems since they lead to performance degradation, namely spectral widening and decrease in power efficiency, for a given modulation. This paper shows that the nonlinear amplification can be viewed as an encoder for nonlinear OQPSK-type signals (Offset Quadrature Phase Shift Keying)...
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