基于数字信道化接收和循环谱特征检测的短波频谱感知方法

A method of spectrum sensing for HF communication based on digital channelized receiver and cyclic-feature detector

为了对短波频谱进行快速准确的频谱感知,提出一种基于数字信道化和循环谱特征检测的短波频谱感知方法。通过设定双功率检测门限,筛选确定信道和可疑信道,然后结合循环谱特征检测方法检测精度高的特性,对可疑信道进行进一步检测,实现对短波频谱快速准确的感知。分析不同信噪比下数字信道化接收机的检测性能和基于能量检测的信道能量分布,并对3种不同的检测方法进行性能比较。仿真试验结果表明:基于数字信道化接收和循环谱特征检测的短波频谱感知方法是有效的。

In order to achieve spectrum sensing of short-wave spectrum fast and accurately, a detection method based on digital ehannelized and cyclic spectral features was proposed. The decided channels and doubtful channels were selected by setting the double detecting thresholds of power. Combined with the high detection accuracy of the cyclic spectrum, the doubtful channels were detected further, and the spectrum sensing of short-wave spectrum can be achieved fast and accurately. The signal detection performance was analyzed based on the digital channelized receiver and the energy distr/bution of channels with the method of energy detection in different SNRs, and the performances of 3 detection methods were compared. The experimental results show that the effectiveness and superiority of the method of spectrum sensing for HF communication based on digital channelized receiver and cyclic-feature detector.