No-fuzzy capture method and device of BOC (n, n) shift correlation

A technology without ambiguity and related functions, applied in the field of satellite navigation and positioning, can solve problems such as inability to deal with ambiguity problems, and achieve the effects of saving computation, eliminating multi-peaks, and reducing complexity

Active Publication Date: 2019-08-09
GUILIN UNIV OF ELECTRONIC TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The BOC signal direct processing method is to correlate the received signal with the locally generated BOC signal. Although the algorithm is simple to implement, it cannot deal with the ambiguity problem caused by the multimodality of the autocorrelation function.

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Embodiment Construction

[0056] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0057] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the compo...

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Abstract

The invention provides a no-fuzzy capture method and device of BOC (n, n) shift correlation. The no-fuzzy capture method comprises the steps that a BOC signal is subject to down-conversion processingto obtain an intermediate frequency signal; the intermediate frequency signal is mixed with a local carrier to obtain a same phase branch signal and an orthogonal branch signal; local PRN sequence isdivided into an odd branch signal and an even branch signal; the odd branch signal and a complex signal are multiplied to obtain a first signal; the first signal is divided into an advanced quarter code chip and delayed three quarters of code chips to respectively obtain a second signal and a third signal; a coherent integral operation is performed on the second signal and the third signal to obtain a fourth signal and a fifth signal; according to the reconstruction related rules, a sixth signal and a seventh signal are obtained, and according to a test statistic formula, a no fuzzy detectionstatistic is obtained; and whether the detection statistic is greater than the set detection threshold value or not is determined, and if yes, it is shown that the signal is accurately captured.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation and positioning, and in particular relates to a BOC (n, n) shift-related unambiguous capture method. Background technique [0002] At present, satellite navigation has entered the GNSS multi-system era from the single GPS era. With the continuous increase of signals, the spectrum resources are limited, and the spectrum overlap of satellite signals causes signal interference within and between systems, thereby affecting the performance of satellite navigation and positioning. The BOC modulation technology has the characteristic of spectrum splitting and can realize spectrum sharing. However, the autocorrelation function of the BOC modulated signal has multiple correlation peaks. The multiple peaks of the signal cause the energy dissipation of the correlation peaks, which easily causes the peak value of the secondary peak to exceed the peak value of the main peak, thus causing false cap...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/24G01S19/29G01S19/30
CPCG01S19/24G01S19/29G01S19/30
Inventor 孙希延周青纪元法严素清付文涛符强王守华黄建华
Owner GUILIN UNIV OF ELECTRONIC TECH
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