摘要： 为提高频谱资源的利用率,针对实际无线通信信道,搭建基于Matlab 和通用软件无线电外设的无线通信
系统平台,应用能量检测法对主用户信号进行频谱感知和可用频谱带宽估计,实现频谱检测并为次用户的频谱接
入提供判断依据。实验结果表明,该方法能快速准确地实现无线电系统通信,并且在高信噪比和采样个数较多的
情况下,能较好地检测频谱占用情况,满足认知无线电频谱感知的要求。
关键词:
认知无线电,
频谱感知,
能量检测,
通用软件无线电外设,
频谱带宽
Abstract: To improve the utilization of spectrum resource,with real wireless channel,a software radio system consisting
of Matlab and Universal Software Radio Peripheral ( USRP ) is applied as a new experiment platform for wireless
communication system. With the platform,this paper completes an energy-based detection algorithm for spectrum sensing and estimating available spectrum bandwidth,realizes spectrum sensing and provides a basis for judgment in second user’s spectrum access. Experimental results show that the method can de used to design wireless system communication quickly and accurately. In high Signal Noise Ratio(SNR) and the more number of sampling cases,it can well realize spectrum sensing and meet the requirements of spectrum sensing of cognitive radio.
Key words:
cognitive radio,
spectrum sensing,
energy detection,
Universal Software Radio Peripheral ( USRP ),
spectrum bandwidth
中图分类号: