An Unambiguous Tracking Method for Sinusoidal boc Modulated Signals

A technology for tracking and modulating signals without ambiguity, applied in the field of global navigation satellite systems, to achieve the effects of moderate computational complexity, good suppression effect, and good resistance to thermal noise

Active Publication Date: 2019-04-19
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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  • An Unambiguous Tracking Method for Sinusoidal boc Modulated Signals
  • An Unambiguous Tracking Method for Sinusoidal boc Modulated Signals
  • An Unambiguous Tracking Method for Sinusoidal boc Modulated Signals

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Embodiment Construction

[0029] The implementation steps of the present invention will be further described below in conjunction with the accompanying drawings:

[0030] The present invention proposes an ambiguous tracking method for sinusoidal BOC modulated signals based on the local auxiliary signal at the receiver end. The method first generates two locally adjustable pulse auxiliary signals x at the receiver end that are mirror images of each other 1 And x 2 , And then use these two locally adjustable pulse auxiliary signals to perform cross-correlation calculations with the received BOC signals, and then perform the specified absolute value calculations on the two cross-correlation calculation results obtained, thereby obtaining a composite correlation function without peaks ( ComposedCorrelation Function (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 fuzzy tracking of the BOC signal. The invention has moderate com...

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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 global navigation satellite system (Global Navigation Satellite System, GNSS) field, and specifically relates to a GNSS satellite navigation signal, that is, a method for tracking a sinusoidal BOC modulated signal of a binary offset carrier (Binary Offset Carrier, BOC) modulated signal without ambiguity . Background technique [0002] The Global Navigation Satellite System (GNSS) is widely used in military and civilian fields with its high-precision, global, 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 have adopted BOC signal modulation. Compared with the traditional BPSK modulation method, BOC modulation has many advantages: the spectrum separation between signals can be achieved through parameter adjustment, so that the signal energy is concentrated on...

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Application Information

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Patent Type & Authority Patents(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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