Technology of Information Security
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App. Res. of Comp. Printed Article
Vol. 36, 2019 No. 8
2483-2487,2491

Blind period estimation of PN sequence based on pulse shaping of spectrum signal

Li Qun
Zhang Tianqi
Yuan Shuai
Chongqing Key Laboratory of Signal & Information Processing, Chongqing University of Posts & Telecommunications, Chongqing 400065, China
DOI: 10.19734/j.issn.1001-3695.2018.02.0106

Abstract

The spectrum of the baseband spread spectrum signal has a wide frequency range, when the signal is transmitted in the band limited channel, the bandwidth of the signal needs to be limited, thereby causing intersymbol interference. Therefore, in order to reduce the inter-symbol crosstalk between baseband spread spectrum signals and their occupied bandwidth, this paper studied the main parameters of its low interception performance of the baseband spread spectrum signal after it passed through the pulse shaper, and it estimated pseudocode period by using twice power spectrum. The theoretical analysis proved that the signal after twice power spectrum extends spectral line on the period of impulse sequence, and the main energy of the signal would gather in some sharpness similar to that of the quadratic spectrum of the baseband shaping pulse. The pseudo-code period of the baseband spread spectrum signal could be estimated by measuring the spacing between these sharp pulses. Simulation results show that the method of twice power spectrum can be used to estimate the pseudo-code period of pulse shaped spread baseband signal under low signal-to-noise ratio condition. And accuracy of the algorithm to estimate the proposed pseudo-code period improves approximately 7 dB compared to the method without pulse shaping.

Foundation Support

国家自然科学基金资助项目(61671095,61371164,61702065,61701067,61771085)
信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003)
重庆市研究生科研创新项目(CYS17219)
重庆市教育委员会科研项目(KJ1600427,KJ1600429)

Publish Information

DOI: 10.19734/j.issn.1001-3695.2018.02.0106
Publish at: Application Research of Computers Printed Article, Vol. 36, 2019 No. 8
Section: Technology of Information Security
Pages: 2483-2487,2491
Serial Number: 1001-3695(2019)08-051-2483-05

Publish History

[2019-08-05] Printed Article

Cite This Article

李群, 张天骐, 袁帅. 基于脉冲成形扩频信号伪码周期盲估计 [J]. 计算机应用研究, 2019, 36 (8): 2483-2487,2491. (Li Qun, Zhang Tianqi, Yuan Shuai. Blind period estimation of PN sequence based on pulse shaping of spectrum signal [J]. Application Research of Computers, 2019, 36 (8): 2483-2487,2491. )

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Application Research of Computers, founded in 1984, is an academic journal of computing technology sponsored by Sichuan Institute of Computer Sciences under the Science and Technology Department of Sichuan Province.

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