基于无线电监测技术的认知无线电频谱检测研究

Spectrum Detection in Cognitive Radio Based on Radio Monitoring Technology

认知无线电频谱检测通常将干扰温度作为探测目标,通过估计空间内任意一点的干扰温度并与设定的干扰温度限值比较找出可用频谱。根据干扰温度估计理论算法,结合现代无线电监测技术,可以将无线电监测站的监测、测向系统作为分布传感器直接测定干扰温度估计算法中几个重要的中间未知参数,继而得到考察空间区域内任意一点的干扰温度值。该方法对理论算法进行了实践验证,可以对算法未来的修正、完善提供实践依据,并且对发展无线电监测技术以便为无线电频率资源管理部门制定相应的决策提供技术依据具有重要意义。

In cognitive radio, spectrum detection is targeted on detecting the interference temperature. Through estimating the interference temperature of any point in space and comparison with the threshold, the available spectrum could be detected. According to the algorithm principle of interference temperature estimation and the radio monitoring technology, several unknown key parameters in algorithm could be measured directly by taking the radio monitoring system as distributed sensors. With this result the interference temperature in the related space could be figured out. This method has verified the algorithm and offered reference for amendment and improvement of the algorithm in the future. It also of importance in the development of radio monitoring technology and decision-making process of radio administrations.