认知无线电快速时域能量检测方法

A Fast Algorithm of Time-domain Energy Detection for Cognitive Radio

提出一种快速时域检测方法,该方法基于下变频器和低通滤波器的并行检测结构,通过共享多相滤波器组,以及采用快速反傅里叶变换模块替换下变频器的方法,实现并行检测的快速计算.通过仿真实验对比,证明本算法在检测误差、计算成本等方面比传统的时域或频域能量检测方法性能更好.

Energy detection is the most common sensing method for cognitive radio. A fast algorithm for time-domain detection is presented in this paper. Parallel detection model, which consists of down-convertors and low-pass filters, is adopted in this algorithm. Fast calculation of this model is achieved by sharing the low-pass multi-band filters and applying IFFT module instead of down-converts. Simulations demonstrate that the purposed algorithm can give more excellent performance, including error detection and cost calculation, in comparison with traditional time-domain and frequency-domain detection methods.