Analyzing spectral regrowth of QPSK and OQPSK signals

  title={Analyzing spectral regrowth of QPSK and OQPSK signals},
  author={Raviv Raich and G. Tong Zhou},
In this paper, a comparison is made between the spectral regrowth of quadrature phase shift keyed (QPSK) and offset QPSK (OQPSK) signals as they go through non-linear amplifications. Contrary to existing approaches that assume the power amplifier input is Gaussian, our analysis is carried out without the Gaussian assumption, by using higher-order statistics. We show that it is possible to assess quantitatively, whether and how much OQPSK is beneficial in reducing spectral regrowth. Simple… CONTINUE READING