DocumentCode :
3459817
Title :
Parameter Estimation of DSSS Signals with Line Enhancement
Author :
Zhang, Xiao-Ming ; Zhang, Zhong-zhao
Author_Institution :
Commun. Res. Center, Harbin Inst. of Technol., Harbin
fYear :
2006
fDate :
20-23 Aug. 2006
Firstpage :
127
Lastpage :
132
Abstract :
A new adaptive estimator for direct sequence spread spectrum (DSSS) signals using fourth-order cumulant based adaptive method is considered. The general higher-order statistics may not be easily applied in signal processing with too complex computation. Based on the fourth-order cumulant with 1-D slices and adaptive filters, an efficient algorithm is proposed to solve the problem and extended for non-stationary stochastic processes. In order to achieve accurate parameter estimation of direct sequence spread spectrum (DSSS) signals, the first step uses the modified fourth-order cumulant to reduce the computing complexity. While the second step employs an adaptive recursive system to estimate the power spectrum in the frequency domain. For the case of intercepted signals without large enough data samples, the estimator provides good performance in parameter estimation and white Gaussian noise suppression. Computer simulations are included to corroborate the theoretical development with different signal-to-noise ratio conditions and recursive coefficients.
Keywords :
Gaussian noise; adaptive filters; frequency-domain analysis; higher order statistics; recursive estimation; spread spectrum communication; DSSS; adaptive filter; adaptive recursive system; direct sequence spread spectrum signal; fourth-order cumulant; frequency domain; higher-order statistics; line enhancement; nonstationary stochastic process; parameter estimation; power spectrum estimation; signal processing; white Gaussian noise suppression; Adaptive filters; Adaptive signal processing; Adaptive systems; Frequency estimation; Higher order statistics; Parameter estimation; Recursive estimation; Signal processing algorithms; Spread spectrum communication; Stochastic processes; DSSS signal; Parameter estimation; line enhancement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Acquisition, 2006 IEEE International Conference on
Conference_Location :
Shandong
Print_ISBN :
1-4244-0528-9
Electronic_ISBN :
1-4244-0529-7
Type :
conf
DOI :
10.1109/ICIA.2006.305946
Filename :
4097879
Link To Document :
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