For the former, the classic theory of signal detection and estimation methods can be used to solve the problem;
占用空闲频段的情况用经典信号检测与估计理论的方法即可以完成检测；
The theory of railway signal detection and process is analyzed and the realizing of the hardware interface software is introduced.
剖析了机车信号检测和处理的理论，并介绍硬件接口部分的软件实现。
Based on the Signal Detection Theory (SDT) and the statistics principle, the choice method of judgement baseline was studied.
以信号处理理论和放射性统计学为基础，研究了判断限的选择方法。
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