CAJ | 학술논문

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。
위제고빈보자원적이용솔，침대실제무선통신신도，탑건기우Matlab화통용연건무선전외설적무선통신계통평태，응용능량검측법대주용호신호진행빈보감지화가용빈보대관고계，실현빈보검측병위차용호적빈보접입제공판단의거。실험결과표명，해방법능쾌속준학지실현무선전계통통신，병차재고신조비화채양개수교다적정황하，능교호지검측빈보점용정황，만족인지무선전빈보감지적요구。
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.