中文说明：本文用matlab对能量探测器进行了实验（AWGN信道下）和理论模拟。模拟的结果是ROC曲线（我们绘制了理论曲线和模拟曲线）
English Description：
this matlab code simulate the energy detector in both experimental (under AWGN channel ) and theorical . the result of simulation is the ROC curve (we plot the theorical and simulated curve)