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Method and apparatus for restraining cross-correlation interference in GNSS

A technology of interference suppression and cross-correlation, applied in the field of communication

Inactive Publication Date: 2011-11-16
容宝华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0023] In order to solve the deficiencies of the existing GNSS cross-correlation interference suppression method and device, the present invention provides a new GNSS cross-correlation interference suppression method and device

Method used

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  • Method and apparatus for restraining cross-correlation interference in GNSS

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Embodiment Construction

[0051] Embodiments of the present invention provide a method for suppressing GNSS cross-correlation interference, and a device for suppressing GNSS cross-correlation interference.

[0052] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0053] See attached figure 1 A method for suppressing GNSS cross-correlation interference provided by an embodiment of the present invention includes:

[0054] S101. Detecting, demodulating and receiving all strong signals in the signal can be performed according to various existing methods for detecting and demodulating strong signals, such as directly performing a correlation algorithm. The main goal of this step is to obtain the phase information of the strong signal, so as to for later steps.

[0055] S102, generating a spreading code synchronous with a certain strong signal, the detailed description is:

[0056] The spreading code sequence that generates the i-phase of the mt...

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Abstract

The invention provides a method and an apparatus for restraining cross-correlation interference in GNSS. The invention comprises the following steps: step A, detecting and demodulating a strong signal in a receiving signal; step B, generating a spreading code synchronized to a certain strong signal; step C, carrying out segmentation on the receiving signal according to a certain length; step D, carrying out segmentation on the spreading code that is generated in the step B; step E, generating a set of orthogonal codes such as a Walsh code and a set of orthogonal codes with a certain length, for example, a set of Walsh codes; step F, generating a set of outputs after corresponding multiplication of an output of the step D with an output of the step E; step G, generating a set of outputs after corresponding summation of convolution by an output of the step C with the outputs of the step F; step H, generating a set of outputs after corresponding multiplication of the outputs of the step F with the outputs of the step G; step I, generating an output after accumulation of a set of data referring to the outputs of the step H; step J, carrying out merging of segments on the outputs of the step I and then generating an output. According to the invention, the method has low complexity of algorithm and the apparatus has a good comprehensive property.

Description

Technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for suppressing GNSS cross-correlation interference. Background technique [0002] In the global satellite positioning and navigation system (GNSS), the satellite sends out the signal carrying the positioning and navigation data. After the signal of the positioning and navigation data is transmitted through the satellite channel, the signals of the positioning and navigation data of multiple satellites arrive at the terminal (receiver) at the same time. . The terminal (receiver) uses a specific spread spectrum code to perform correlation operations on the received signal containing positioning and navigation signals from multiple satellites to complete demodulation, and obtain positioning and navigation data sent by different satellites respectively. The specific spreading codes correspond to the spreading codes used by the transmitting end on differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/21
Inventor 容宝华
Owner 容宝华
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