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Indoor testing system of antenna array based interference rejection module of global navigation satellite system (GNSS)

A technology of interference suppression and antenna array, which is applied in the field of global navigation satellite systems, can solve problems that are difficult to achieve, high difficulty, and complex design in ordinary laboratories, and achieve the effect of improving national defense capabilities and promoting development and application

Active Publication Date: 2013-12-18
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the need to adjust the phase of each satellite signal, this solution is very difficult and complex in design, and it is difficult for ordinary laboratories to achieve

Method used

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  • Indoor testing system of antenna array based interference rejection module of global navigation satellite system (GNSS)
  • Indoor testing system of antenna array based interference rejection module of global navigation satellite system (GNSS)
  • Indoor testing system of antenna array based interference rejection module of global navigation satellite system (GNSS)

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] figure 1 It is the baseband algorithm performance testing system of the present invention, which is used to test the performance of the interference suppression algorithm, including a control unit connected in sequence, a multi-channel digital interference signal generation unit, an interference suppression processing unit, and an interference suppression performance analysis unit. figure 2 It is a structural block diagram of a multi-channel digital interference signal generating unit, which generates signals with a fixed phase relationship under the control of the control unit. N Road IF digital interference signal, N is an integer not less than 2. The multi-channel digital interference signal generation unit includes a clock module, a modulation signal generation module, a digital frequency synthesizer and a digital modulation module.

[0040] The clock module provides the corresponding clock frequency for the modulating signal generating module, the digital freque...

Embodiment 2

[0046] image 3 The A / D conversion performance impact testing subsystem of the present invention is used to test the impact of A / D conversion on the performance of the interference suppression algorithm. On the basis of the system in Embodiment 1, the system of this embodiment adds a multi-channel digital-to-analog conversion unit and a multi-channel analog-to-digital conversion unit, and the others remain unchanged, so that the effects of digital-to-analog conversion and analog-to-digital conversion on interference suppression performance can be tested influences. The system of this embodiment mainly includes a control unit, a multi-channel digital interference signal generation unit, a multi-channel digital-to-analog conversion unit, a multi-channel analog-to-digital conversion unit, an interference suppression processing unit, an interference suppression processing unit, and an interference suppression performance analysis unit connected in sequence. The multi-channel digi...

Embodiment 3

[0050] Figure 4 It is the radio frequency influence test subsystem of the present invention, which is used to test the influence of radio frequency processing on the interference suppression algorithm. On the basis of the system in Embodiment 2, the system of this embodiment adds a multi-channel up-conversion unit and a multi-channel down-conversion unit, and other changes are not made, so that the influence of radio frequency end processing on interference suppression performance can be tested more realistically. This embodiment includes a control unit connected in sequence, a multi-channel digital interference signal generating unit, a multi-channel digital-to-analog conversion unit, a multi-channel up-conversion unit, a multi-channel down-conversion unit, a multi-channel analog-to-digital conversion unit, an interference suppression processing unit, an interference Suppresses the profiling unit.

[0051] The multi-channel up-conversion unit converts the multi-channel digi...

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Abstract

The invention discloses an indoor testing system of an antenna array based interference rejection module of a global navigation satellite system (GNSS). The indoor testing system comprises a control unit, a multichannel figure interference signal producing unit, an interference rejection processing unit and an interference rejection performance analyzing unit. The control unit is used for controlling types of intermediate frequency figure interference signals produced by the multichannel figure interference signal producing unit, and the multichannel figure interference signal producing unit is used for producing multi-way intermediate frequency figure interference signals. The interference rejection processing unit is the antenna array based interference rejection module of the GNSS and used for rejecting the multi-way intermediate frequency figure interference signals produced by the multichannel figure interference signal producing unit. The interference rejection performance analyzing unit is used for analyzing interference rejection performance of the interference rejection processing unit. The indoor testing system of the antenna array based interference rejection module of the GNSS can test and analyze all stages of an antenna array based interference rejection algorithm in the GNSS receiver, and the problem that testing of the antenna array based interference rejection algorithm is difficult is solved.

Description

technical field [0001] The invention belongs to the field of global navigation satellite systems, in particular to a GNSS indoor test system based on an antenna array interference suppression module. Background technique [0002] With the vigorous development and widespread application of GNSS (Global Navigation Satellite System), people are paying more and more attention to its vulnerability research. In the military field, jamming and anti-jamming technologies for navigation have been applied to actual weapon systems, and have been demonstrated in some wars (such as the Iraq War and the Kosovo War). Therefore, the interference and suppression technology of GNSS receiving system has become a research hotspot in this field. [0003] Among various interference suppression techniques, antenna array-based spatial filtering, space-time and space-frequency adaptive processing techniques have become the main research objects in this field because they can suppress various types o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/23G01S19/21
Inventor 郭文飞施闯牛小骥班亚龙张娣
Owner WUHAN UNIV
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