Switching the state by the order code, the system can be in the state of beacon or response.
通过切换命令码的状态，系统可分别工作在信标和应答状态下。
The beacon signal is the reunite signal of linear FM signal and pulse code signal, and the pulse code signal is used as a token of emit signal.
信标信号为线性调频信号和脉冲编码信号的复合信号，其中脉冲编码信号用来表征发射信号序号。
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