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A frequency false lock detection device and method for an integrated navigation receiver

A technology of combined navigation and detection devices, which is applied in the direction of measuring devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., can solve problems such as failure and indistinguishability, and achieve simple structure, suitable for hardware implementation, and avoid carrier-to-noise ratio The effect of the calculation

Active Publication Date: 2017-07-21
杭州中科微电子有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This method can only be effective when the false lock occurs. When the loop is stable, the error of the phase / frequency detector will not show a large deviation, and the method will fail.
In addition, the above method cannot distinguish the false lock frequency deviation beyond the phase lock / frequency range, and it is powerless to detect under weak signals

Method used

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  • A frequency false lock detection device and method for an integrated navigation receiver
  • A frequency false lock detection device and method for an integrated navigation receiver
  • A frequency false lock detection device and method for an integrated navigation receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Such as image 3 As shown, a frequency false lock detection device of an integrated navigation receiver includes:

[0048] An integration module, the integration module is composed of an in-phase broadband integrator, a quadrature broadband integrator, an in-phase narrowband integrator and a quadrature narrowband integrator; the in-phase broadband integrator and the quadrature broadband integrator integrate the integrated navigation receiving The in-phase despreading signal I and the quadrature despreading signal Q of the machine output the in-phase broadband integration signal Ip (n) and the quadrature broadband integration signal Qp (n), and the integration duration is equal to the integration duration of the integrated navigation receiver; The in-phase narrowband integrator and the quadrature narrowband integrator respectively integrate the inphase despread signal I and the quadrature despread signal Q of the combined navigation receiver, and output the inphase narro...

Embodiment 2

[0053] Such as Figure 4 as shown,

[0054] A frequency false lock detection device for an integrated navigation receiver, comprising:

[0055] An integration module, the integration module is composed of an in-phase broadband integrator, a quadrature broadband integrator, an in-phase narrowband integrator and a quadrature narrowband integrator; the in-phase broadband integrator and the quadrature broadband integrator integrate the integrated navigation receiving The in-phase despreading signal I and the quadrature despreading signal Q of the machine output the in-phase broadband integration signal Ip (n) and the quadrature broadband integration signal Qp (n), and the integration duration is equal to the integration duration of the integrated navigation receiver; The in-phase narrowband integrator and the quadrature narrowband integrator respectively integrate the inphase despread signal I and the quadrature despread signal Q of the combined navigation receiver, and output th...

Embodiment 3

[0061] A frequency false lock detection method for an integrated navigation receiver of the detection device, comprising an integration step:

[0062] Respectively use the in-phase broadband integrator and the in-phase narrow-band integrator to integrate the in-phase despread signal I of the combined navigation receiver to obtain the in-phase broadband integration signal Ip (n) and the quadrature broadband integration signal Qp (n); the integral duration is equal to the The integration time of the integrated navigation receiver;

[0063] Integrate the quadrature despreading signal Q of described combined navigation receiver with quadrature broadband integrator and quadrature narrowband integrator respectively, obtain quadrature broadband integral signal Qp (n) and quadrature narrowband integral signal Qn (n), integral The duration is less than the integration duration of the integrated navigation receiver;

[0064] Calculation steps of broadband carrier-to-noise ratio: calcul...

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PUM

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Abstract

The invention discloses a combined navigation receiver frequency false lock detection device and method. The frequency false lock detection device comprises an integration module, a carrier-to-noise ratio calculation module and a false lock detection module. The frequency false lock detection method comprises an integration step, a carrier-to-noise ratio calculation step and a false lock detection step. According to the invention, the comparison between a difference between broadband signal power and narrowband signal power and the noise floor power is utilized, so that the carrier-to-noise ratio calculation is avoided, the structure is simple and effective, and the invention is more suitable for hardware realization. The frequency false lock is detected by a difference between a broadband signal carrier-to-noise ratio and a narrowband signal carrier-to-noise ratio; independent operation from a tracking loop is achieved; and the tracking loop cannot be influenced and influences of parameters of the tracking loop are also prevented.

Description

technical field [0001] The invention relates to a frequency false lock detection device and method, in particular to a frequency false lock detection device and method for an integrated navigation receiver. Background technique [0002] The integrated navigation receiver uses a combination of satellite navigation and inertial navigation. The satellite navigation receiver uses a frequency-locked loop (FLL) or a phase-locked loop (PLL) to track the carrier frequency of the input signal, so that the receiver's local carrier and the input signal carrier frequency The same, so as to realize the stripping of the carrier signal and obtain the baseband signal. [0003] As shown in Figure 1, the input signal 101 is a digital intermediate frequency signal output after the satellite navigation receiver antenna, radio frequency amplification, down conversion, and quantization, and the local carrier generator 102 generates the local intermediate frequency carrier in-phase signal and quad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 蔺晓龙何文涛冯华星翟昆朋殷明胡晓峰王浩
Owner 杭州中科微电子有限公司
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