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Non-fuzzy tracking method for sine BOC modulation signal

A technology of non-ambiguity tracking and modulation signal, applied in the field of global navigation satellite system, to achieve the effect of good suppression effect, good thermal noise resistance and moderate computational complexity

Active Publication Date: 2016-03-02
HARBIN ENG UNIV
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Problems solved by technology

[0005] Aiming at the deficiencies of the existing BOC signal ambiguity elimination method, the object of the present invention is to propose a method for ambiguity-free tracking of a sinusoidal BOC modulated signal that completely removes the side peaks of the correlation function and eliminates the ambiguity problem during BOC signal tracking.

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  • Non-fuzzy tracking method for sine BOC modulation signal
  • Non-fuzzy tracking method for sine BOC modulation signal
  • Non-fuzzy tracking method for sine BOC modulation signal

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Embodiment Construction

[0030] The implementation steps of the present invention will be further described below in conjunction with the accompanying drawings:

[0031] The present invention proposes an unambiguous tracking method for sinusoidal BOC modulation signals based on local auxiliary signals at the receiver end. In this method, two locally adjustable pulsed auxiliary signals x are generated at the receiver as mirror images 1 and x 2 , and then use these two local adjustable pulse auxiliary signals to perform cross-correlation calculations with the received BOC signal, and then perform the specified absolute value calculation on the two cross-correlation calculation results obtained, so as to obtain the composite correlation function of the boundless peak ( ComposedCorrelationFunction, CCF), so that there is only one zero-crossing point in the phase detection curve output by the phase detector, so as to realize the unambiguous tracking of the BOC signal. The invention has moderate computing...

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Abstract

The invention belongs to the field of global navigation satellite system (GNSS), and specifically relates to a non-fuzzy tracking method for a sine BOC modulation signal, wherein the method is used for a GNSS satellite navigation signal, i.e., a BOC (binary offset carrier) modulation signal. The method comprises the steps: receiving the BOC signal; enabling a locally generated pulse signal to be multiplied by a locally generated PRN signal; carrying out the integral accumulation of two intermediate frequency signals with an advanced local auxiliary signal and a lagged local auxiliary signal, i.e., convolution operation, and obtaining the integral accumulation results of all branch circuits; inputting a phase demodulation result Epsilon into a loop filter, converting the phase demodulation result Epsilon, outputting an adjustment amount, and adjusting PRN.

Description

technical field [0001] The invention belongs to the field of Global Navigation Satellite System (Global Navigation Satellite System, GNSS), and specifically relates to a method for unambiguously tracking a GNSS satellite navigation signal, that is, a sinusoidal BOC modulation signal of a binary offset carrier (Binary Offset Carrier, BOC) modulation signal. Background technique [0002] The global satellite navigation system (GNSS) has been widely used in military and civilian fields due to its advantages of high precision, globalization, and all-weather high-quality navigation services. In order to achieve frequency band sharing and spectrum separation, and achieve higher tracking accuracy and performance requirements, modern GPS, Galileo, and China Beidou all use BOC signal modulation. Compared with the traditional BPSK modulation method, BOC modulation has many advantages: the spectrum separation between signals can be realized through parameter adjustment, so that the sig...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/29
CPCG01S19/29
Inventor 王伟祁艳杰殷波吕晓永朱玮
Owner HARBIN ENG UNIV
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