Analysis of Spectral Regrowth on Forward-Link CDMA Signals Based on Fifth-order Nonlinear Distortion
In this paper, based on the time domain model of the forward-link CDMA signal, analytical expressions relating the spectral regrowth of the CDMA signal passed through a nonlinear amplifier with a digitally modulated carrier to both the third-order intercept point and fifth-order intercept point, IP3 and IP5, were derived using the power series and high-order cumulant. This statistical method considers the nonlinear transformation of statistical properties of moments of a complex Gaussian random variable to develop a simple expression for the autocorrelation of the output signal. Analytical results are useful in finding optimal operating conditions of the power amplifier. In the end, the comparison between the simulation and practical measurement show that a better fit using both IP3 and IP5 than using only IP3.
Spectral Regrowth CDMA Power Spectrum Density Autocorrelation Function High-order cumulant
Shi Ying Lin Maoliu Chen Yiping Li Juan
Harbin Institute of Technology,Harbin 150001 China; Heilongjiang Institute of Science and Technology Harbin Institute of Technology,Harbin 150001 China Heilongjiang Institute of Science and Technology,Harbin 150027 China
国际会议
西安
英文
2007-08-16（万方平台首次上网日期，不代表论文的发表时间）