CAJ | 학술논문

多径干扰不具备空间相关性,难以通过差分方法消除,是影响全球导航卫星系统定位精度的关键因素之一。从接收机处理的导航信号受前端带宽限制以及近距离多径干扰更需抑制两个角度出发,提出了一种基于多门延迟(MGD)结构的多径干扰抑制方法,推导了带宽受限时 MGD 结构的多径误差的数学表达式,以加权和非加权多径误差包络面积最小作为目标函数,优化了该结构中早迟门系数,并以典型导航信号 SinBOC(10,5)为例来说明该方法的性能。结果表明：对于 SinBOC (10,5),该方法多径误差包络面积小于高分辨率相关器(HRC)方法至少15%；当前端带宽较大时,该方法对于较小和中等延迟的多径信号的抑制能力优于 HRC 方法。
다경간우불구비공간상관성,난이통과차분방법소제,시영향전구도항위성계통정위정도적관건인소지일。종접수궤처리적도항신호수전단대관한제이급근거리다경간우경수억제량개각도출발,제출료일충기우다문연지(MGD)결구적다경간우억제방법,추도료대관수한시 MGD 결구적다경오차적수학표체식,이가권화비가권다경오차포락면적최소작위목표함수,우화료해결구중조지문계수,병이전형도항신호 SinBOC(10,5)위례래설명해방법적성능。결과표명：대우 SinBOC (10,5),해방법다경오차포락면적소우고분변솔상관기(HRC)방법지소15%；당전단대관교대시,해방법대우교소화중등연지적다경신호적억제능력우우 HRC 방법。
Multipath interferences which are difficult to be eliminated through the differential method be-cause they are not interrelated in space,affects the positioning accuracy of global navigation satellite sys-tems(GNSS). The navigation signals in the receiver are affected by the front-end bandwidth,and the close multipath interference suppression has more practical significance. From the two aspects a multipath inter-ference suppression method based on multiple gate delay(MGD) is proposed in this paper. The multipath error mathematical expressions of the MGD method under limited bandwidth are derived,the early-late gate coefficients of the MGD are optimized by minimizing the areas closed by the weighted and non-weighted multipath error envelopes,and the typical navigation signal SinBOC (10,5) is chosen as an example to il-lustrate the performance of the method. The results show that for SinBOC(10,5) the area closed by the multipath error envelopes of MGD method is less than that of the high-resolution correlator(HRC) method at least 15% ,and when the front-end bandwidth is large,for the small and medium delayed multipath sig-nal the multipath error of the MGD method is less than that of HRC method.