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Method and device for capturing binary offset carrier BOC modulation signal

A modulated signal and capture device technology, applied in the field of navigation, can solve the problems of low capture accuracy of BOC modulated signals, and achieve the effect of reducing complexity and high-precision capture performance

Pending Publication Date: 2021-04-27
DATANG SEMICON DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a method and device for capturing BOC modulated signals, which can at least solve the problem of low capture accuracy of BOC modulated signals

Method used

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  • Method and device for capturing binary offset carrier BOC modulation signal
  • Method and device for capturing binary offset carrier BOC modulation signal
  • Method and device for capturing binary offset carrier BOC modulation signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Such as figure 2 As shown, a method for capturing a BOC modulated signal may include:

[0056] Step 201, the signal to be captured is sequentially processed by the front end, mixed with the local carrier signal, and correlated with the local pseudo-code signal to obtain the first accumulated signal;

[0057] Step 202, performing frequency mixing processing on the local subcarrier and the first accumulated signal to obtain a second accumulated signal;

[0058] Step 203, performing calculations based on the first accumulated signal and the second accumulated signal to filter out side lobes in the correlation function of the BOC adjusted signal to obtain an energy value;

[0059] In step 204, a detection decision is made according to the energy value and a preset capture threshold.

[0060] In this embodiment, the calculation may be performed according to the first accumulated signal, the second accumulated signal and a preset weight. In specific applications, there ma...

Embodiment 2

[0093] A device for capturing BOC modulated signals, such as Figure 5 As shown, can include:

[0094] front-end processing unit 51;

[0095] Carrier numerically controlled oscillator (carrier NCO) 52;

[0096] Pseudo-code numerical control oscillator (pseudo-code NCO) 53;

[0097] first mixer 54;

[0098] correlator 55;

[0099] second mixer 56;

[0100] computing unit 57;

[0101] Detection decider 58;

[0102] Wherein, the signal to be captured is sent to the first mixer 54 after the front-end processing of the front-end processing unit 51, and the first mixer 54 combines the local carrier signal generated by the carrier numerically controlled oscillator 52 with the The signal processed by the front-end is mixed and sent to the correlator 55, and the correlator 55 performs a process of mixing the signal after the mixed frequency with the local pseudo-code signal generated by the pseudo-code numerical control oscillator 53. Correlation operation to obtain the first a...

Embodiment 3

[0109] The present application also provides a navigation receiver, which includes the above-mentioned device for capturing BOC modulated signals. For specific technical details, refer to Embodiment 1 and Embodiment 2.

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Abstract

The invention discloses a method and device for capturing a binary offset carrier BOC modulation signal, and the method comprises the steps: sequentially carrying out the front-end processing of a to-be-captured signal, the frequency mixing of a to-be-captured signal with a local carrier signal, and the correlation operation of the to-be-captured signal with a local pseudo code signal, and obtaining a first accumulation signal; performing frequency mixing processing on a local subcarrier and the first accumulation signal to obtain a second accumulation signal; performing calculation based on the first accumulation signal and the second accumulation signal to filter side lobes in a BOC adjustment signal correlation function to obtain an energy value; and carrying out detection judgment according to the energy value and a preset capture threshold. According to the method and the device, the problem of low capture precision caused by BOC modulation signal correlation function multimodality is solved, and the complexity is reduced while high-precision capture is ensured.

Description

technical field [0001] The invention relates to the technical field of navigation, in particular to a method and device for capturing a BOC modulated signal. Background technique [0002] With the development of science and technology, human research on navigation and positioning technology has entered the era of satellite positioning. In order to provide accurate position and speed information on a global scale and around the clock, the concept of a Global Navigation Satellite System (GNSS, Global Navigation Satellite System) is proposed. Global satellite navigation systems play a very important role in many fields, including military, navigation, exploration, monitoring, measurement, communication timing, etc. With the rapid development of civilian applications in recent years, global satellite navigation systems have gradually In-depth, satellite navigation technology is inseparable from mobile phones, personal computers, automobiles, civil aircraft, missiles, and fighte...

Claims

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Application Information

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IPC IPC(8): G01S19/37G01S19/29G01S19/30
CPCG01S19/29G01S19/30G01S19/37
Inventor 宋挥师徐雄伟
Owner DATANG SEMICON DESIGN
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