400KHz channel machine based on software digital processing

Abstract

The invention provides a 400KHz channel machine based on software digital processing. The 400KHz channel machine is connected with a main control unit through a secondary development interface for operating the 400KHz channel machine; the main control unit is connected with an FPGA radio frequency modulation and demodulation unit through an UART interface, the FPGA radio frequency modulation and demodulation unit is connected with a radio frequency signal receiving and sending unit, the radio frequency signal receiving and sending unit is connected with a transmitting power control detection unit and an antenna interface, and the transmitting power control detection unit is connected with a main control unit through an IIC interface; and the main control unit is connected with a temperature detection unit through a UART interface, and the transmitting power control detection unit monitors the temperature in the 400KHz channel machine. The 400KHz channel machine is based on the radio frequency signal software modulation and demodulation technology, adopts a high-speed FPGA chip and a digital oscillator, and realizes the digital processing of radio frequency signals of the channel machine, and a decoding function of sub audio signals and MSK signals.

Description

technical field [0001] The invention relates to the technical field of railway communication, in particular to a 400KHz channel machine based on software digital processing. Background technique [0002] The 400KHz wireless train dispatching communication adopts the inductive communication method. In the application of the railway communication system, the railway catenary wire is used as the wave conductor, and the wireless-wired-wireless transfer method is used to realize the synchronous operation communication of the locomotive coordination operation. In the railway communication system It is an important communication method to ensure driving safety, and plays an important role in railway transportation and safety. Especially in the complex terrain conditions of mountainous areas, the signal coverage quality of electrified railways is poor. By adopting 400KHz wireless communication technology, the investment is small, the maintenance is simple, and the communication qual...

AI Technical Summary

Problems solved by technology

[0003] The traditional 400KHz channel machine adopts the design of analog discrete components, which has problems such as complex production and debugging, poor batch consistency of equipment, poor performance indicators, and low reliability.

The current digital radio station basically adopts baseband digitalization and intermediate frequency digitalization schemes, so it is necessary to perform analog up and down conversion of radio frequency signals, and there is also the problem of unstable performance indicators.

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