CAJ | 학술논문

针对衰落环境下频谱利用率的提高,采用了一种基于接收信号自相关矩阵的特征值的检测方法。该方法基于随机矩阵理论,用最大最小特征值作为检验统计量来检测授权用户是否存在,从而改善频谱利用率。将随机产生的BPSK信号和捕获的DTV信号分别作为信号源在莱斯衰落信道下进行信号检测仿真。实验表明与传统能量检测方法的对比,该检测算法在莱斯衰落信道下具有良好的检测性能。
침대쇠락배경하빈보이용솔적제고,채용료일충기우접수신호자상관구진적특정치적검측방법。해방법기우수궤구진이론,용최대최소특정치작위검험통계량래검측수권용호시부존재,종이개선빈보이용솔。장수궤산생적BPSK신호화포획적DTV신호분별작위신호원재래사쇠락신도하진행신호검측방진。실험표명여전통능량검측방법적대비,해검측산법재래사쇠락신도하구유량호적검측성능。
To improve spectrum utilization in fading environment,a method is adopted based on the eigenvalue of the autocorrelation matrix of the received signal.This method is based on the random matrix theory,using the ratio from the maximum eigenvalue to the minimum eigenvalue as the test statistic to detect the existence of primary users,so as to improve the spectrum efficiency.Simulations are made respectively based on the BPSK（Binary Phase Shift Keying）and the captured DTV（Digital Television）signals in the Rician fading channel.The results show that the performance of the adopted method is better than the energy detection method in the same fading environment.