认知无线电网络中，当信噪比不同时检测概率随虚警概率的变化曲线。-In Cognitive radio network,when the SNR is not the same, the change curve between the detection probability and the false alarm probability.

单用户的虚警概率和检测概率的关系，程序正确，简单易懂，值得参考-Single-user relationship probability of false alarm and detection probability, the program is correct, easy to understand, it is also useful