Generalized unambiguous tracking method based on pseudo correlation function for multi-level coded symbol modulated signals

Modulated signals used in communication systems exhibits cyclic periodicity. This is primarily due to sinusoidal product modulators, repeating preambles, coding and multiplexing in modern communication. This property of signals can be analyzed using cyclostationary analysis. SCF (Spectral correlation function) of cyclic autocorrelation (CAF) has unique features for different modulated signals and noise. Different techniques are applied to SCF for extracting features on the basis of which decision of detecting a signal or noise is made. In this chapter, study and analysis of different modulated signals used in satellite communication is presented using SCF. Also comparison of several signal detection techniques is provided on the basis of utilizing unique feature exhibit by a normalized vector calculated on SCF along frequency axis. Moreover a signal detection technique is also proposed which identifies the presence of a signal or noise in the analyzed data within the defined threshold limits.

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Proposals for the implementation to the processing of discrete signals with multi-level correlation function

Ukrainian Information Security Research Journal ◽

10.18372/2410-7840.14.2885 ◽

2012 ◽

Vol 14 (4 (57)) ◽

Author(s):

Алексей Анатольевич Смирнов

Keyword(s):

Correlation Function ◽

Discrete Signals ◽

Multi Level

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Unambiguous Tracking Method Based on a New Combination Function for BOC Signals

IEICE Transactions on Communications ◽

10.1587/transcom.e97.b.923 ◽

2014 ◽

Vol E97.B (4) ◽

pp. 923-929 ◽

Cited By ~ 1

Author(s):

Lan YANG ◽

Zulin WANG ◽

Qin HUANG ◽

Lei ZHAO

Keyword(s):

New Combination ◽

Tracking Method ◽

Unambiguous Tracking ◽

Combination Function

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An Improved Unambiguous Tracking Technique for CBOC Signals

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.571-572.853 ◽

2014 ◽

Vol 571-572 ◽

pp. 853-857

Author(s):

Hao Liu ◽

Bing Bing Li ◽

Zhao Tong ◽

Yong Tao Hui ◽

Xing Wang Zhong

Keyword(s):

Correlation Function ◽

Autocorrelation Function ◽

Correlation Functions ◽

Tracking Performance ◽

Main Peak ◽

Two Stage ◽

Short Delay ◽

Second Stage ◽

Tracking Technique ◽

Unambiguous Tracking

The autocorrelation function of Composite BOC(CBOC) signals has many side-peaks, which leads to the ambiguous problem. To solve this problem, an improved two-stage unambiguous tracking scheme is proposed in this paper. In the first stage, an unambiguous correlation function with narrow main peak is constructed by combining four out of twelve sub-correlation functions. In the second stage, by adding the rest of sub-correlation functions, the final correlation function with sharper and higher main-peak is developed based on the preparatory function from the first step. Numerical results demonstrate that compared to the original methods, the proposed scheme has a better tracking performance and can effectively suppress the short delay multipath.

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