On the analysis of single and multiple carrier WCDMA systems with polynomial nonlinearities

In this paper we develop un analytical framework for the analysis of wideband CDMA systems with single and multiple carriers and with a memoryless nonlinearity suitably described by an n-th order polynomial model. The nonlinear component may be the RF power amplifier in terrestrial and satellite applications. The in-band and out-of-band interference due to nonlinear distortion are jointly considered to analytically evaluate the performance degradation by means of both total and adjacent channel degradation as a function of the output backoff of the amplifier and the carrier spacing. The results presented here show that with a single analytical tool it is possible to efficiently evaluate the different aspects of the performance degradation starting from the specifications of the nonlinear device.