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A boc navigation signal receiver and its code tracking method

A technology of navigation signals and receivers, which is applied in satellite radio beacon positioning systems, instruments, measuring devices, etc., and can solve problems such as mislocking

Active Publication Date: 2022-06-28
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Nevertheless, due to the presence of multiple peaks in the autocorrelation function of the BOC, there is a serious ambiguity problem in the baseband signal processing of the receiver, which may lead to non-negligible positioning deviations
If the traditional DLL (DelayLock Loop) is used for phase detection of BOC, it may be mistakenly locked to other side peak positions

Method used

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  • A boc navigation signal receiver and its code tracking method
  • A boc navigation signal receiver and its code tracking method
  • A boc navigation signal receiver and its code tracking method

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Embodiment 1

[0031] see figure 1 , the code tracking method of the BOC navigation signal receiver provided by the first embodiment of the present invention includes the following steps: it should be noted that, if there is substantially the same result, the code tracking method of the BOC navigation signal receiver of the present invention is not based on the following steps: figure 1 The sequence of processes shown is limited.

[0032] S101. Analyze the cross-correlation function between the BOC signal and the PRN according to the modulation order of the BOC signal, and decompose the cross-correlation function into N sub-cross-correlation functions.

[0033] BOC is a new carrier modulation method proposed in the Galileo system design process. Its basic principle is to add a binary subcarrier on the basis of the original BPSK modulation. The biggest feature of this modulation method is that the main lobe of its power spectrum is split into two symmetrical parts, and the distance between ...

Embodiment 2

[0077] see figure 2 , the code tracking device of the BOC navigation signal receiver provided by the second embodiment of the present invention includes:

[0078] Decomposition unit 201, for analyzing the cross-correlation function of the BOC signal and the PRN according to the BOC signal modulation order, and decomposing the cross-correlation function into N sub-cross-correlation functions;

[0079] A generating unit 202, configured to generate two local auxiliary codes by analyzing the sub-cross-correlation function, and generate a leading auxiliary code and a lagging auxiliary code according to the two local auxiliary codes;

[0080] Construction unit 203, for constructing a reconstruction correlation function after the two local auxiliary codes are correlated with the BOC signal;

[0081] The acquisition unit 204 is used to correlate the leading auxiliary code and the lagging auxiliary code with the BOC signal respectively and then pass through the integral clearer, and co...

Embodiment 3

[0085] Embodiment 3 of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements the BOC navigation signal receiver provided in Embodiment 1 of the present invention The steps of the code tracking method.

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Abstract

The invention provides a BOC navigation signal receiver and a code tracking method thereof, comprising: analyzing the cross-correlation function between the BOC signal and the PRN according to the modulation order of the BOC signal, and decomposing the cross-correlation function into N sub-cross-correlation functions; The sub-cross-correlation function generates two local auxiliary codes, and generates a leading auxiliary code and a lagging auxiliary code according to the two local auxiliary codes; constructs a reconstruction correlation function after correlating the two local auxiliary codes with the BOC signal; combines the leading auxiliary code and the lagging auxiliary code After the auxiliary code is correlated with the BOC signal respectively, it passes through the integral clearer, and the result of the integral clearer is combined with the reconstruction correlation function to obtain a phase detection formula for error-free locking points; the phase of the local code is controlled by the phase detection output and the code NCO. The phase detection output is the output result obtained according to the phase detection formula, so that the code phase difference between the delay of the local code and the received BOC signal is infinitely close to zero, thus completing the ambiguity-free tracking of the BOC signal of each modulation order.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation receivers, in particular to a BOC navigation signal receiver and a code tracking method thereof. Background technique [0002] With the rapid development of major Global Navigation Satellite System (GNSS, Global Navigation Satellite System) systems, the available radio communication frequency band resources have become more scarce. How to maximize the utilization of the limited communication frequency band is the key to satellite navigation technology. In order to ensure that the major GNSS systems can develop and work in an orderly manner in different frequency bands, the spectrum splitting characteristics of Binary Offset Carrier (BOC) have become an opportunity to use it as a navigation satellite signal. In addition, because BOC improves tracking accuracy and provides better multipath resistance and narrowband interference compared to traditional Binary Phase Shift Keying (BPSK) mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/13G01S19/30
CPCG01S19/13G01S19/30
Inventor 符强陈孝倩孙希延纪元法程雷雷正强
Owner GUILIN UNIV OF ELECTRONIC TECH
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