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Carrier Tracking Method Applicable to Single Bit Quantization Beidou Receiver

A carrier tracking and single-bit technology, applied in measuring devices, radio wave measuring systems, satellite radio beacon positioning systems, etc., can solve the problem that the continuous tracking process is vulnerable to damage, and achieve the effect of suppressing the impact

Active Publication Date: 2017-09-05
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This persistent tracking process is easily corrupted when the signal has large distortions

Method used

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  • Carrier Tracking Method Applicable to Single Bit Quantization Beidou Receiver
  • Carrier Tracking Method Applicable to Single Bit Quantization Beidou Receiver
  • Carrier Tracking Method Applicable to Single Bit Quantization Beidou Receiver

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Embodiment Construction

[0023] Such as figure 1 As shown, it is a single-bit quantized Beidou receiver suitable for the carrier tracking method of the present invention. The Beidou receiver includes a Beidou second-generation satellite navigation signal frequency band antenna with a center frequency of 1561.098MHz and a bandwidth of not less than 4.092MHz; a mixer for down-converting the received Beidou second-generation satellite navigation radio frequency signal to Frequency point; a single-bit analog-to-digital converter, used to quantize the Beidou second-generation satellite navigation intermediate frequency signal into a single-bit digital signal s(k), when the polarity of the intermediate frequency signal is positive, the quantized digital signal is +1, and the intermediate frequency When the signal polarity is negative, the quantized digital signal is -1; a numerically controlled oscillator is used to generate I / Q two-way local carrier signal r(k), and the generation method is:

[0024] r(k)...

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Abstract

The invention provides a carrier wave tracking method suitable for a one-bit quantification Beidou receiver. The method includes the steps: making the output of a one-bit quantification Beidou receiver multiply-accumulator serve as the input of a signal tracking processor, conducting estimation of a signal to noise ratio (SNR) value, calculating a filtering parameter needed during a Kalman filtering process through the estimated signal to noise ratio (SNR) value, and utilizing a Kalman filter to predict and correct the frequency and the phase deviant of a carrier wave. Modeling is achieved on the basis of an error function of a signal coherent integration output result in the condition of one-bit quantification, and the Kalman filter is utilized for filter processing of an integration result. Therefore, the influence of quantification errors upon the signal tracking performance can be effectively inhibited.

Description

technical field [0001] The invention relates to a carrier tracking method suitable for a single-bit quantization Beidou receiver. Background technique [0002] In the commercial Beidou second-generation satellite navigation receiver, in order to save hardware costs and reduce power consumption of the whole machine, an analog-to-digital converter (ADC) with a low quantization bit width is usually used. When using a single-bit analog-to-digital converter, the received satellite signal is quantized to +1 or -1 according to its signal polarity, and the quantization error will cause large signal distortion. For the Beidou receiver, the carrier frequency and phase offset of the Beidou navigation satellite signal received by it show continuous changes with the relative movement between the receiver and the Beidou satellite, so it is necessary to continuously adjust the carrier frequency and phase offset of the received signal Sex stalking. This continuous tracking process is easi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/29
CPCG01S19/29
Inventor 陈凌宇彭敖李耿民
Owner XIAMEN UNIV