A Modified Adaptive Filtering Acquisition Method for PN Code with Data Modulation

Author

Liu, Yunzhi ; Pan, Yahan ; Yao, Fuqiang

Author_Institution

Nanjing Telecommun. Technol. Inst., Nanjing, China

Volume

15

Issue

8

fYear

2011

fDate

8/1/2011 12:00:00 AM

Firstpage

869

Lastpage

871

Abstract

Adaptive filtering acquisition method has been proved to be an effective pseudo-noise (PN) code acquisition method in DS-SS system, which is especially useful for long PN code acquisition in low Signal to Noise Ratio (SNR) environment. In order to make use of this method in those PN code acquisition systems with data modulation, a modified adaptive filtering is proposed in this paper, where the effect of polarity reversion caused by data modulation on PN code is removed by employing absolutely successive difference technique in both the received signals and local generated PN code. Compared with the adaptive filtering acquisition method, even with data modulation, the proposed method can attain almost similar acquisition performance, which is tested by simulations.

Keywords

adaptive filters; code division multiple access; modulation; pseudonoise codes; spread spectrum communication; DS-SS system; PN code acquisition; SNR environment; data modulation; modified adaptive filtering acquisition method; polarity reversion effect; pseudonoise code acquisition method; signal to noise ratio environment; successive difference technique; Adaptation model; Delay; Delay effects; Least squares approximation; Modulation; Signal to noise ratio; Synchronization; Acquisition; LMS algorithm; PN code; adaptive filtering;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2011.062711.110639

Filename

5937207