Analysis of spectral regrowth on forward-link CDMA signals based on fifth-order nonlinear distortion

被引：0
|
作者：
Shi Ying [1 ,2 ]
Lin Maoliu [1 ]
Chen Yiping [2 ]
Li Juan [1 ]
机构：
[1] Harbin Inst Technol, Harbin 150001, Peoples R China
[2] Heilongjiang Inst Sci & Technol, Harbin 150027, Peoples R China
来源：
ICEMI 2007: PROCEEDINGS OF 2007 8TH INTERNATIONAL CONFERENCE ON ELECTRONIC MEASUREMENT & INSTRUMENTS, VOL II | 2007年
关键词：
spectral regrowth; CDMA; power spectrum density; autocorrelation function; high-order cumulant;
D O I：
暂无
中图分类号：
TP31 [计算机软件];
学科分类号：
081202 ; 0835 ;
摘要：
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.
引用
收藏
页码：200 / +
页数：2
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