BOC signal processing method and navigation terminal

A signal processing and signal technology, which is applied in the field of satellite navigation and positioning, can solve problems such as large ranging errors and receiver error locking, and achieve the effects of avoiding loop false locks, improving positioning accuracy, and suppressing multipath effects

Pending Publication Date: 2020-06-02
TECHTOTOP MICROELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The new generation of GNSS adopts BOC modulation, and there will be multiple autocorrelation peaks, and the amplitude attenuation between the main peak and the side peaks is not large. Large odometry error, so needs to be improved

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  • BOC signal processing method and navigation terminal
  • BOC signal processing method and navigation terminal
  • BOC signal processing method and navigation terminal

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0038] Such as Figure 3 to Figure 6 As shown, the method for proc...

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Abstract

The invention discloses a BOC signal processing method and a navigation terminal. The BOC signal processing method comprises the following steps of S100, dividing the GNSS baseband signals into N paths, wherein N is larger than or equal to 2; S101, multiplying each GNSS baseband signal by a local pseudo code generated by a pseudo code generator, wherein the pseudo code generator generates the local pseudo code according to the phase difference of the filtered pseudo codes; S102, respectively carrying out coherent integration of a plurality of periods on each path of multiplied signal; S103, calculating a pseudo code phase difference according to the N paths of integrated signals; S104, filtering the pseudo code phase difference, and sending the filtered pseudo code phase difference to thepseudo code generator; and S105, enabling the pseudo code generator to generate a new local pseudo code according to the filtered pseudo code phase difference. The GNSS baseband signals are multipliedby the local pseudo codes, and then the coherent integration is performed, and the signals after multipath integration are calculated to obtain the pseudo code phase difference, so that the loop false locking can be effectively avoided, the multipath effect can be effectively suppressed, and the positioning precision can be enhanced.

Description

technical field [0001] The present invention relates to the technical field of satellite navigation and positioning, in particular to a BOC signal processing method and a navigation terminal. Background technique [0002] The BPSK-R signal autocorrelation function of traditional GNSS has only one main peak with high amplitude, and the code ring with lead lag is generally used to complete the single autocorrelation peak identification. The new generation of GNSS adopts BOC modulation, and there will be multiple autocorrelation peaks, and the amplitude attenuation between the main peak and the side peaks is not large. Large ranging error, so it needs to be improved. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present invention is to propose a BOC signal processing method that can effectively identify the main peak and avoid loop false lockin...

Claims

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Application Information

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IPC IPC(8): G01S19/30G01S19/37
CPCG01S19/30G01S19/37
Inventor 王菲毛磊潘军张勇
Owner TECHTOTOP MICROELECTRONICS
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