The present application relates to a kind of railway passenger
virtual cluster wireless communication driver terminal
simulation channel access hardware equipment, belong to railway
wireless communication technical field, including FPGA core controller, speech codec
chip and
Ethernet transmission
chip, FPGA core controller is connected with existing analog
system vehicle
station by UART interface, PTT line and CD line to respectively realize instruction interaction, transmission control and carrier detection, is connected with speech codec
chip by I2
S interface to realize the bidirectional conversion of analog voice and digital voice, is connected with
Ethernet transmission chip by RMII interface to realize
network data transmission, and vehicle
station instruction is transmitted to FPGA core controller
processing by UART interface and reply;Uplink voice is triggered by CD line, and after sampling
digitization by speech codec chip by FPGA core controller, it is packaged as UDP data packet, is transmitted to
server by
Ethernet.The present application realizes the seamless access of analog terminal to
virtual cluster system, reduces the equipment modification threshold during
system transition.