A capture device and method for radio frequency signals in etc air

Abstract

The invention discloses a grabbing device for ETC air radio frequency signals, which is composed of an uplink radio frequency signal processing unit and a downlink radio frequency signal processing unit, and the uplink radio frequency signal processing unit is used for amplifying and processing the received uplink radio frequency signal , demodulate the amplified radio frequency signal to obtain signals of different frequencies; integrate and process the signals of different frequencies to obtain decoding data, frequency data and power data corresponding to the different frequency signals; the downlink radio frequency signal processing unit The processing of the downlink radio frequency signal is the same as that of the uplink radio frequency signal processing unit. The collection of air radio frequency signals and transaction signals during the communication process between the ETC roadside equipment and the OBU in the vehicle is realized through the device, so as to judge whether the ETC roadside equipment is working normally Provide a data base.

Description

technical field [0001] The present application relates to the field of signal processing, in particular to a grabbing device for ETC air radio frequency signals, and also relates to a grabbing method for ETC air radio frequency signals. Background technique [0002] With the use of ETC toll system in the entire expressway toll network, ETC toll system has become the core means of expressway toll collection, which plays a decisive role in toll collection work. In practical applications, the working status and stability of ETC roadside equipment are The key to the stable operation of the entire system is to monitor the status of the ETC roadside equipment. The core is the capture of the ETC air radio frequency signal and the measurement of signal parameters. For the capture of ETC air radio frequency signals, it was originally a debugging device used by developers to obtain on-site air radio frequency transaction data in order to find problems. The internal components are as f...

AI Technical Summary

Problems solved by technology

[0004] The first one is that it can only capture data frames, but cannot measure the physical parameters of radio frequency signals, so it is not sure whether the hardware meets the requirements of the national standard;

[0005] The second is insufficient reception, often missing weaker RF signals

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