CAJ | 학술논문

为了更好地在飞机机舱内复用宝贵的无线频谱，将认知无线电技术应用于无线内通系统中是非常有必要的，然而在机舱内实现快速可靠的频谱感知则是实现高效频谱复用的基础。本文以此目的，研究了基于最快检测技术的频谱感知算法在机舱内频谱感知中的适用性。在分析了频谱感知性能需求的基础上，将频谱感知问题归结为非贝叶斯最快检测问题，并介绍了基于累积和Cumulate Sum的频谱感知算法的具体检测步骤。分析结果表明，基于最快检测的频谱感知算法可以解决常规的频谱感知算法检测延迟长、存在信噪比门限效应的问题。
위료경호지재비궤궤창내복용보귀적무선빈보，장인지무선전기술응용우무선내통계통중시비상유필요적，연이재궤창내실현쾌속가고적빈보감지칙시실현고효빈보복용적기출。본문이차목적，연구료기우최쾌검측기술적빈보감지산법재궤창내빈보감지중적괄용성。재분석료빈보감지성능수구적기출상，장빈보감지문제귀결위비패협사최쾌검측문제，병개소료기우루적화Cumulate Sum적빈보감지산법적구체검측보취。분석결과표명，기우최쾌검측적빈보감지산법가이해결상규적빈보감지산법검측연지장、존재신조비문한효응적문제。
In order to take full advantage of the valuable radio frequency spectrum inside the aircraft cabin, it is necessary to apply cognitive radio in wireless cabin communication system. However, the fast and reliable frequency spectrum sensing is the base of achieving efifcient reuse spectrum. So, this paper studied the adaptation of spectrum sensing algorithm based on quickest detection, and deduced the spectrum sensing problem as Non-Bayesian quickest detection problem on the basis of analyzing the spectrum sensing performance requirement, and introduced the detailed detection steps of spectrum sensing algorithm based on CUSUM (Cumulate Sum) . The result shows that the algorithm can conquer the problem of long detection delay and SNR wal phenomenon.