一个基于com的电话检测和回复程序。程序使用tapi3.0实现，alcatel交换机测试通过-a telephone-based detection and response procedures. Procedures for the use of tapi3.0 realized, the test switches alcatel

tapi3.0实现，检测电话并能播放wav的音乐提示。-tapi3.0 achieved, and can detect telephone broadcast wav music suggested.

认知无线电系统中能量检测部分，通过设置门限值，判断主用户出现与否-In the cognitive radio system, the energy detection part, by setting the threshold value, to judge whether the primary user appears or not.