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基本要求 几乎所有地面无线电传输都会受到多径传播的影响,多径的具有不同时延的信号在接收天线叠加,会产生衰落现象,严重时会发生信号中断。
Basic Requirements Almost all terrestrial radio transmissions are affected by multipath propagation. Multi-path signals with different delays superimpose on the receiving antenna, causing fading and signal interruption in severe cases.