噪声功率波动下的小波变换能量检测改进算法

摘要

Focused on the abstract of energy detection algorithm under noise power uncertainty, a energy detection algorithm based on wavelet transform is referred. The algorithm realize noise power estimation, and execute energy detection followed the estimation. The simulation shows that this algorithm is better than normal energy detection algorithm under the noise power uncertainty, promoting the detection probability of authority signal and lay a foundation for the realization of CR.%针对噪声功率波动时能量检测算法不稳定的缺点，提出了利用小波变换的能量检测算法。该算法利用小波变换实现噪声功率的估计，并根据噪声功率的估计进行能量检测。仿真结果表明，该算法较常规能量检测算法能更好的适应噪声功率波动，提升了授权信号的检测概率，为认知无线电的实现打下了基础。