Study On The Influence Of The Radio Nosie On The Characteristics Of The High-Speed Mobile Channels

With the of a series of High-Speed railway completed and the railway speed-up, Chinese railway rapid growth in recent years. Railway communication can ensure the safety and accuracy of railway operations. Electrified railway radio noise on the rail will cause a great interference on railway communication. The pantograph spark discharge noise is the most important communication noise in Electrified railway.First, we measure and analyze actual pantograph spark discharge noise in Line for passenger transportation. We selected Stop status,Medium-speed status,Accelerate speed status and High-speed status, compared the electrical pulse width,pulse duration of oscillation and noise level in this four case.we use SIMULINK simulation software set up AWGN\Rayleigh\Rician channel module and compared their performance; Compare the GMSK modulation (GSM-R) andπ/4DQPSK modulation (TETRA) property in high-speed channels.Another part of this paper and innovation is research the pantograph spark discharge noise frequency-domain in electrified railway. Set the noise amplitude is 100mv,300mv,500mv and we focused on the Range of radio noise frequency and the max port voltage how change with noise amplitude.