CAJ | 학술논문

鉴于非相干CRB对于分析非相干TOA性能有很大参考价值,将UWB测距系统中接收端信号经过平方律后进行包络检渡所得的信号拟合成指数衰减的曲线,利用最大似然估计推导出非相干检测的CRB,并利用TC、MES算法验证其正确性.对影响TOA性能的非相干检测参数进行了分析,得出积分窗口的选取必须在TOA性能和算法收敛速度上进行折衷的结论.提出了一种新的分析信道时延扩展对CRB影响的方法,最后得出结论CRB随着时延扩展的增大而增大.
감우비상간CRB대우분석비상간TOA성능유흔대삼고개치,장UWB측거계통중접수단신호경과평방률후진행포락검도소득적신호의합성지수쇠감적곡선,이용최대사연고계추도출비상간검측적CRB,병이용TC、MES산법험증기정학성.대영향TOA성능적비상간검측삼수진행료분석,득출적분창구적선취필수재TOA성능화산법수렴속도상진행절충적결론.제출료일충신적분석신도시연확전대CRB영향적방법,최후득출결론CRB수착시연확전적증대이증대.
Due to non-coherent CRB have great referenced worth to analyze TOA performance, and then receive signal after square and envelope detector is curved fit to exponential decay, with ML algorithm, the CRB of non-coherent detector is deduced, which is validated with TC,MES algorithm. The integration window of non-coherent detector parameter influence on TOA performance is stud-ied, and arrive at a conclusion integration window should tradeoff between TOA performance and algorithm rate. A new method in analysis CRB relate with RMS delay spread is proposed, finally, the conclusion that CRB increase when RMS delay spread enhance is available.