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该系统是通过实时自动地加载操作输人命令、列车运行仿真命令以及现场信号设备的实时仿真来实现自动测试的。
This test system is realized by real-time automatic loading commands of operational input and train running simulation, simulating field signal equipment.
大量的仿真结果表明，三个分集结合适当的频率变化，降低了误码率的命令时，归一化多普勒扩展是大于0.3。
Extensive simulations show that combining three diversity branches with proper frequency shifts reduces BER by an order when the normalized Doppler spread is larger than 0.3.
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