A vehicle-mounted antenna fault field test and diagnosis device

A field test, vehicle-mounted antenna technology, applied in the field of communication, to achieve the effect of supporting secondary development, good anti-interference, and reasonable accuracy

Active Publication Date: 2022-02-15
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is very little research on the use of HackRF One, a low-cost, complete software-defined radio device, for the development of channel measurement systems

Method used

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  • A vehicle-mounted antenna fault field test and diagnosis device
  • A vehicle-mounted antenna fault field test and diagnosis device
  • A vehicle-mounted antenna fault field test and diagnosis device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] An on-site test and diagnosis device for vehicle-mounted antenna faults provided by an embodiment of the present invention, such as figure 1 As shown, two pieces of HackRF One are included as the terminals that receive and transmit, and the PC transmits, processes and stores the baseband digital information. The spread spectrum sliding correlation method is used to measure the channel. The baseband detection signal is a PN sequence. Due to its good autocorrelation, the signals superimposed by multiple paths can be distinguished at the receiving end. The PC at the transmitting end uses Matlab for PN sequence generation and pulse shaping processing; the baseband signal is transmitted to HackRF One by GNU Radio and displays the time domain and frequency domain diagrams of signal transmission in real time. At the receiving end, HackRFOne converts the RF signal to the baseband and transmits it to the PC. GNU Radio displays the data in real time and stores it in a file. Matla...

Embodiment 2

[0062] Different from the traditional measuring device, the on-site testing and diagnosing device for vehicle-mounted antenna fault provided by the embodiment of the present invention is based on the HackRF One platform, which reduces the cost of measurement, and at the same time, the accuracy reasonably meets the requirements of most communication systems. The device includes a transmitter and a receiver, adopts the same reference clock to ensure carrier frequency synchronization of signals, and reduces the influence of frequency deviation on measurement results.

[0063] The transmitter includes: a first controller 1, a first HackRF One2 and a first antenna 3, such as figure 2 and 3 shown. The first controller 1 is used to complete the generation of the m sequence, the design of the frame format, the pulse shaping, and configure the first HackRF One parameter, transmit the baseband signal to the first HackRF One and control its emission; the first HackRF One is responsible...

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Abstract

The embodiment of the present invention provides a vehicle-mounted antenna fault on-site test and diagnosis device, including: a transmitter and a receiver; the transmitter includes: a first controller, a first HackRF One and a first antenna, and the first HackRF One controls the first The baseband signal transmitted by the transmitter generates a radio frequency analog signal transmitted in the wireless channel, and after filtering and amplifying the gain, it is radiated into the wireless channel through the first antenna; the receiver includes: the second controller, the second HackRF One and the second Antenna, the second HackRF One is responsible for receiving the signal and transmitting the signal to the second controller; the receiver converts the received signal into a baseband signal and stores it in the second controller, and then the second controller completes the The received data is further processed to obtain parameters characterizing channel fading. The invention uses the software radio equipment to verify the wireless communication system and detect the frequency spectrum, which greatly reduces the test cost.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a device for on-site testing and diagnosing vehicle-mounted antenna faults. Background technique [0002] In the case of harsh working environment and limited space on the train, it is difficult to timely and effectively detect the fault of the GPS antenna on the vehicle, which will objectively lead to potential safety hazards in train operation. And the antenna signal is transmitted into the space through the transmitter in the form of electromagnetic waves. In a complex and diverse space environment, the signal will encounter various terrain and features, and the energy intensity will be greatly attenuated. The signal reaches the receiver through multiple propagation processes and multiple paths such as direct radiation, reflection, scattering and diffusion, which makes the measurement, statistical description and modeling of the channel very difficult. [0003] Antenna ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/17H04B17/29H04B17/309
CPCH04B17/17H04B17/29H04B17/309
Inventor 张金宝闻映红王剑王焱
Owner BEIJING JIAOTONG UNIV
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