CAJ | 학술논문

为提高定时捕获的正确捕获概率并降低漏检概率，提出一种基于分布式天线协同感知的定时捕获方法。该方法针对线形小区的平坦瑞利衰落信道场景，利用两根分布式接收天线接收来自单天线移动台的发射信号；根据中心处理器处的协同感知，确保各分布式接收天线的预定虚警概率，并为门限检测推导协同处理门限；各天线根据门限检测进行分布式天线系统的最大似然定时捕获。仿真结果表明，无论移动台处于线形小区的哪个位置，提出方法在不增加预定虚警概率的情况下，均能改善各分布式天线的正确捕获概率和漏检概率。
위제고정시포획적정학포획개솔병강저루검개솔，제출일충기우분포식천선협동감지적정시포획방법。해방법침대선형소구적평탄서리쇠락신도장경，이용량근분포식접수천선접수래자단천선이동태적발사신호；근거중심처리기처적협동감지，학보각분포식접수천선적예정허경개솔，병위문한검측추도협동처리문한；각천선근거문한검측진행분포식천선계통적최대사연정시포획。방진결과표명，무론이동태처우선형소구적나개위치，제출방법재불증가예정허경개솔적정황하，균능개선각분포식천선적정학포획개솔화루검개솔。
To increase the probability of correct acquisition and decrease the missed detection probability, a timing acquisition method with the cooperative sensing of distributed receive antennas is proposed. In the flat Rayleigh channels of linear cell, two distributed receive antennas are employed to receive the signal transmitted from the Mobile Station(MS)with a single antenna. This paper exploits the false alarm probability at the central processor to guarantee the false alarm probability at each distributed antenna. Based on the exploited probability of false alarm at the central processor, a cooperative detection threshold of each antenna is derived for threshold detection. According to the threshold detection, a Maximum-Likelihood(ML)-based timing acquisition method is proposed for Distributed Antenna Systems(DAS). Without increasing the pre-defined probability of false alarm, the analysis and simulation results show that the correct acquisition probability and the missed detection probability for each distrib-uted antenna can be improved with the proposed method wherever the MS is located.