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Unambiguous Multipath Suppression Method for MBOC Modulated Signals Based on Synthetic Correlation Function

A technology for synthesizing correlation functions and modulating signals, which is applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., to achieve the effect of easy realization

Inactive Publication Date: 2015-08-12
HARBIN ENG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is in order to solve the ambiguity and the problem of multipath suppression that exist when MBOC modulated signal is tracked, has proposed the method based on the MBOC modulated signal of composite correlation function without ambiguity multipath suppressed, at first draw its characteristic according to the characteristics of MBOC signal Autocorrelation function, decompose its autocorrelation function into multiple sub-correlation functions, synthesize new correlation functions from each sub-correlation function, and then apply the anti-multipath principle of strobe technology to the correlation function without side peaks, and propose a A linear combination of two sets of EML (Early Minus Late) at different intervals realizes an anti-multipath suppression technology without ambiguity, and finally realizes ambiguity-free tracking and better multipath suppression effect

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  • Unambiguous Multipath Suppression Method for MBOC Modulated Signals Based on Synthetic Correlation Function
  • Unambiguous Multipath Suppression Method for MBOC Modulated Signals Based on Synthetic Correlation Function
  • Unambiguous Multipath Suppression Method for MBOC Modulated Signals Based on Synthetic Correlation Function

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with specific embodiments.

[0020] The present invention is a method for suppressing multipath without ambiguity of MBOC modulation signal based on synthetic correlation function, such as figure 1 As shown, it includes the following four steps:

[0021] Step 1: According to the characteristics of the MBOC modulated signal, obtain its signal expression.

[0022] MBOC modulated signals are commonly used in the new generation of navigation systems. MBOC signals are defined in terms of power spectral density (PSD), and its expression is:

[0023] G MBOC ( f ) = 10 11 G BOC ( 1,1 ) ( f ) + 1 11 G BOC ( 6,1 ) ( f ) - - - ( 1 )

[0024] Where G MBOC (f) Represents the power spectral density of MBOC; G BOC(1,1) (f) represents the power spectral density of BOC(1,1) signal; G BOC(6,1) (f) represents the power spectral densi...

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Abstract

The invention discloses a multiplex binary offset carrier (MBOC) modulating signal fuzzy-free multi-path restraining method based on correlation function synthesis. The method includes the following steps: 1 acquiring a signal expression of MBOC modulating signals according to the characteristics of the signals; 2 breaking up an MBOC modulating signal self-correlation function obtained in the step 1 into a plurality of self-correlation functions; 3 combining the self-correlation functions according to the characteristics of the self-correlation functions and obtained in the step 2 to obtain a new correlation function, removing side peaks of the MBOC signals and achieving fuzzy-free tracking; 4 applying the anti-multi-path principle of a strobe technology to the new self-correlation function and utilizing linear synthesis of two kinds of different interval EML to achieve multi-path restraining to finally achieve fuzzy-free tracking and obtain a better multi-path restraining effect.

Description

Technical field [0001] The invention relates to an MBOC (Multiplexed Binary Offset Carrier--MBOC) modulation signal-free multipath suppression method based on a composite correlation function, which belongs to the use of a composite correlation function method to eliminate the ambiguity problem of the MBOC modulation signal, thereby realizing MBOC modulation The technical field of signal blur-free multipath suppression. Background technique [0002] The signals in the new-generation American GPS (Global Positioning Satellite) system, the European Union’s Galileo system, and China’s "Beidou II" navigation system will all adopt binary offset carrier (Binary Offset Carrier--BOC) modulation, and BOC modulates the signal. The frequency spectrum with a split form can reduce the mutual interference between various navigation signals in the same frequency band, and the main peak of the BOC signal correlation function is narrow, which can ensure better system performance. Composite binar...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/22
Inventor 沈锋刘明凯徐定杰祝丽业刘博范岳李强贺瑞宋金阳富振铎
Owner HARBIN ENG UNIV
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