In cellular systems, transmitter power must be controlled in order to reduce the co-channel interference caused by frequency reuse.
在蜂窝通信系统中，为了减小由于频率复用造成的共信道干扰，必须对用户的发送功率进行控制。
One of the modes may be selected based on output power level of a transmitter co-located with the SPS receiver.
可基于与SPS接收机共处一地的发射机的输出功率电平来选择这些模式之一。
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