Anti-interference GNSS receiver device combining multiple modes and multiple frequencies with array processing

An array processing, multi-mode and multi-frequency technology, applied in the field of satellite navigation, can solve problems such as the limit of array processing capacity, low utilization rate of antenna and radio frequency channel resources, etc., achieve high engineering practical value, improve anti-jamming and positioning performance, and accuracy high effect

Active Publication Date: 2014-06-18
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems in the prior art that the antenna array only processes a single GNSS frequency point, the utilization rate of antenna and radio frequency channel resources is not high, and there is an array processing capability limit on a single frequency point, the present invention provides a multi-mode multi-frequency point and An anti-jamming GNSS receiver device combined with array processing. This device can automatically select the RF channels participating in array processing according to the existence of interference and the interference situation. The RF channels not participating in array processing are used for normal multi-mode positioning

Method used

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  • Anti-interference GNSS receiver device combining multiple modes and multiple frequencies with array processing
  • Anti-interference GNSS receiver device combining multiple modes and multiple frequencies with array processing
  • Anti-interference GNSS receiver device combining multiple modes and multiple frequencies with array processing

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Embodiment 1

[0041] When interference does not exist, the working process of the device of the present invention is as follows:

[0042] The signal processing channel of the baseband control array outputs 8 kinds of intermediate frequency signals of GNSS signals with different frequency points. For example, the first array signal processing channel outputs GPS L1 intermediate frequency signals, and the second array signal processing channel outputs Beidou B1 intermediate frequency signals.

[0043] Take the first array signal processing channel as an example to illustrate how to control the output of GPS L1 intermediate frequency signals. The signal that enters the first array signal processing channel also contains the 8 kinds of GNSS signals output by the antenna array. First, the 8 kinds of GNSS signals are amplified by the low noise amplifier; then, the first radio frequency switch controls the 8 kinds of GNSS signals according to the baseband control. The signal is sent to the GPS L1 freq...

Embodiment 2

[0047] When interference exists, but the frequency points that cannot be located due to interference are less than 3, at this time, the interfered frequency point signal can be discarded by frequency selection, specifically: the signal processing channel in the array signal processing channel that receives and processes the interference frequency point The first radio frequency switch 1 performs a bypass and shuts off the processing of the interfered frequency signal in the baseband to save power consumption.

[0048] When there are 4 frequency points that cannot be located due to interference, the working process of the device of the present invention is as follows:

[0049] Record the frequency points that cannot be located due to interference and the frequency points that can be located. Mark the frequency points that cannot be located as f1, f2, f3, f4, and the frequency points that can be located as f5, f6, f7, and f8. Configure the array signal processing channels correspondi...

Embodiment 3

[0057] When interference exists and the frequency points that cannot be located due to the interference are greater than 4 but less than 8, the method of embodiment 2 is used for anti-interference processing, that is, the frequency points that cannot be located are marked as f1, f2, ..., fi, 4≤i<8; configure the array signal processing channels corresponding to antenna 1 power division output 1, antenna 3, antenna 5 and antenna 7 to the same frequency point, and the configured frequency points are f1, f2,..., fi One of the points uses a four-channel anti-jamming algorithm to perform anti-jamming processing on the output frequency points of the four-array element signal processing channel.

[0058] When all frequency points are interfered and cannot be located, the power division output of antenna 1 1, antenna 3, antenna 5, and antenna 7 are used as the first group, and the four-channel anti-interference algorithm is used for the array signal channel corresponding to the first grou...

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Abstract

The invention discloses an anti-interference GNSS receiver device combining multiple modes and multiple frequencies with array processing. The receiver device comprises an antenna array, multi-path array signal processing channels and a base band used for signal processing, wherein the antenna array, the multi-path array signal processing channels and the base band are connected in sequence, a plurality of GNSS signals output by the antenna array are input into corresponding array signal processing channels respectively, and the array signal processing channels are sued for conducting mixing on the GNSS signals output by the antenna array. When no interference exists, each array signal processing channel outputs one type of frequency point signal, and multi-modality positioning is achieved. When interference exists, all the array signal processing channels or part of the array signal processing channels are selected to participate in anti-interference positioning, and interference restraining is achieved. According to the anti-interference GNSS receiver device, the anti-interference performance and the positioning performance of the receiver can be effectively improved.

Description

Technical field [0001] The present invention belongs to the field of satellite navigation, and particularly relates to an anti-jamming Global Navigation Satellite System (GNSS) receiver device that combines multi-mode, multi-frequency and array processing. Background technique [0002] The Global Navigation Satellite System (GNSS) is a satellite-based radio positioning and navigation system. It currently includes the Global Positioning System (GPS) of the United States, Galileo of Europe, the Beidou system of China and the grid of Russia. Lonas system and so on. GNSS has been widely used because it can provide all-weather, all-weather, high-precision positioning and timing services. However, GNSS signals are transmitted from satellites over 20,000 kilometers, and when they reach the antenna end of the ground receiver, the signals are very weak. At the same time, the existing electromagnetic signal environment is getting worse, and various unintentional and malicious interference...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21G01S19/32
Inventor 郭文飞施闯孙健兴朱玉建郑建生
Owner WUHAN UNIV
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