An electronic non-parking toll collection device and its radio frequency front end and radio frequency receiving method

Abstract

The invention discloses a radio frequency front end of electronic toll collection equipment. The radio frequency front end comprises multiple radio frequency transceivers different in receiving frequency point range, a digital signal conditioning circuit and a microcontroller, the radio frequency transceivers are used for synchronously receiving radio frequency signals and demodulating and decoding the same to generate digital signals, the digital signal conditioning circuit is used for performing logic and processing on the digital signals output synchronously by the radio frequency transceiver to generate narrow-bandwidth digital signals, and the microcontroller is used for reading the narrow-bandwidth digital signals generated by the digital signal conditioning circuit. By performing logic and processing on the digital signals output by the radio frequency transceivers, narrow-bandwidth receiving can be realized effectively, so that signal quality and accuracy are improved. The invention further discloses the electronic toll collection equipment and a radio frequency receiving method thereof, which have the above advantages.

Description

technical field [0001] The present application relates to the technical field of electronic non-parking toll collection, and in particular to an electronic non-stop toll collection device, a radio frequency front end and a radio frequency receiving method thereof. Background technique [0002] Electronic toll collection technology (Electronic Toll Collection, ETC) is currently the most advanced road and bridge toll collection method in the world. Through the dedicated short-range communication (Dedicated Short Range Communication, DSRC) between the on-board unit (On board Unit, OBU) installed on the vehicle and the road side unit (Road Side Unit, RSU) installed on the side of the ETC lane, using computer networking The technology and the bank carry out background settlement processing, so as to achieve the purpose of paying road and bridge tolls without stopping when vehicles pass through road and bridge toll stations. [0003] In the ETC system, the vehicle-mounted unit an...

AI Technical Summary

Problems solved by technology

However, the RF front end in the prior art is limited by the bandwidth performance of the filter device of the internal chip when performing RF reception, and its receiving bandwidth cannot be adjusted, so it is generally large, making the signal to be received easily affected by adjacent channel signals and The interference of noise signals at some frequency points causes the signal-to-noise ratio to decrease and the quality of signal reception to decrease, which in turn affects the correct analysis of the signal

Images