In the solution of FTTR,the received radio signals was multiplied by a pseudorandom noise (PN) at Terminal Stations(TSs) ,and encapsul ated into the envelope of optical signal by IM of LD.

• 在光纤到铁路沿线(FTTR)方案中对终端站接收的无线信号进行扩频编码，进入光纤通道并到达中心站。