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A Multipath Wireless Test Method for Navigation Signal Based on Microwave Reverberation Chamber

A technology for navigation signals and reverberation chambers, which is applied to radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc. Suppressing the loss of real meaning of test evaluation and other problems, to achieve the effect of good promotion and application value, simple test system, and low dependence

Active Publication Date: 2022-03-01
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

The traditional test method uses a satellite navigation signal simulator to superimpose multipath signals on the basis of the main signal by adjusting the delay, amplitude, and phase. Such simulation tests cannot reflect the slow-changing and random technical characteristics of multipath signals. , this method has the following limitations for the test and evaluation of satellite navigation multipath signals:
[0004] 2. During the simulation test and evaluation of satellite navigation multipath signals, the core antenna unit of multipath reception and multipath suppression is ignored, which makes the multipath reception and suppression test evaluation lose its real meaning

Method used

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  • A Multipath Wireless Test Method for Navigation Signal Based on Microwave Reverberation Chamber
  • A Multipath Wireless Test Method for Navigation Signal Based on Microwave Reverberation Chamber

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Embodiment Construction

[0020] refer to figure 1 and figure 2 , the navigation signal multipath wireless test environment based on microwave reverberation chamber is composed of reverberation chamber, stirrer, satellite navigation signal simulator, transmitting antenna, receiving antenna, standard receiver and test control / simulation and evaluation system. The reverberation chamber is composed of a mechanical stirrer in a high-quality metal cavity. The rotation of the stirrer makes the boundary conditions of the electromagnetic field in the reverberation chamber constantly change, and the phase, amplitude, and time delay of the navigation signal that changes the position of the receiving antenna in the reverberation chamber are continuously changed according to the simulated signal law according to the parameters set by the simulation. The simulation process of the path becomes a random process, realizing the wireless real test of the multipath signal.

[0021] Firstly, the reverberation chamber a...

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Abstract

The invention discloses a satellite navigation multipath signal wireless testing method based on a microwave reverberation chamber. The invention proposes a wireless test method for realizing satellite navigation multipath signals by utilizing a microwave reverberation chamber. Relying on the microwave reverberation chamber as a platform, the satellite navigation signal is converted into a wireless signal. By controlling the rotation of the stirrer, the phase, amplitude, and time delay of the navigation signal at the receiving antenna position in the reverberation chamber are changed, and the signal is simulated according to the law. The continuous change changes the signal multipath simulation process into a random process, and realizes the wireless real simulation test of the multipath signal. Accurately quantify and evaluate the impact of satellite navigation multipath signals. The method of the invention is simple and feasible, and has engineering popularization and application value.

Description

technical field [0001] The invention relates to the fields of communication, satellite navigation, signal processing, antenna testing and the like, and is especially suitable for testing and evaluating the influence of satellite navigation multipath signals. Background technique [0002] In the receiving and processing of satellite navigation signals, multipath signals become one of the main sources of error restricting high-precision measurement. If the simulation and evaluation of multi-path signals, multi-satellite navigation pseudo-range and high-precision measurement influence become a difficult problem in the field of satellite navigation. The traditional test method uses a satellite navigation signal simulator to superimpose multipath signals on the basis of the main signal by adjusting the delay, amplitude, and phase. Such simulation tests cannot reflect the slow-changing and random technical characteristics of multipath signals. , this method has the following limit...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/23G01S19/22G01S19/36
CPCG01S19/23G01S19/22G01S19/36
Inventor 段召亮
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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