CAJ | 학술논문

针对无人机在飞行过程中由于受到多径干扰的影响，延迟锁定环的鉴相曲线发生严重畸变，进而影响环路跟踪，造成环路失锁的问题，以及传统串行捕获算法重新捕获时间较长等不足，提出了基于数字匹配滤波器（ DMF）结构的时间窗捕获算法，介绍了DMF的结构，分析了DMF量化比特数及取样间隔等参数的选取原则，并给出了时间窗捕获算法的详细设计步骤。工程实测结果表明，算法在莱斯信道中捕获速度快且误码性能良好。
침대무인궤재비행과정중유우수도다경간우적영향，연지쇄정배적감상곡선발생엄중기변，진이영향배로근종，조성배로실쇄적문제，이급전통천행포획산법중신포획시간교장등불족，제출료기우수자필배려파기（ DMF）결구적시간창포획산법，개소료DMF적결구，분석료DMF양화비특수급취양간격등삼수적선취원칙，병급출료시간창포획산법적상세설계보취。공정실측결과표명，산법재래사신도중포획속도쾌차오마성능량호。
Aiming at the problem of PD curve distortion in delay locked loop,which leads to losing lock,and the defect of long reacquisition time of traditional serial acquisition algorithm, because of multipath introduced by UAV flying, an acquisition algorithm with time windows based on DMF structure is proposed.First of all,DMF structure is presented,and the selection principle of the param-eters,such as the number of quantization bits of DMF and sampling interval,is analyzed.What’s more,the detailed designing steps of acquisition algorithm with time windows are introduced.The engineering test shows that the algorithm brings not only an advantage of fast capturing,but also good error-bit performance.