To reduce the operational complexity of the multipath estimating delay lock loop (MEDLL) and improve its anti-multipath performance for strobe correlators, a combination anti-multipath scheme, namely, the MEDLL on-strobe correlation technique, is proposed for global navigation satellite system (GNSS) signal processing. Short-delay multipath rays are separated from the strobe correlation function by the MEDLL mechanism; the dot product between the estimation residue and the standard correlation function or the BOC-PRN correlation function is then computed to eliminate the potential tracking ambiguity. Finally, this non-coherent combination result is sent to the loop filter to obtain anti-multipath code tracking. The proposed method is analysed via simulator data with a software receiver under different front-end bandwidth conditions. The results corroborate the better multipath mitigation capability and lower computational burden, although it is still difficult to eliminate all multipath interference, especially when the front-end bandwidth is insufficient.

中文翻译：

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MEDLL On-Strobe Correlator：用于 GNSS 信号跟踪的组合抗多路径技术

为降低多径估计延迟锁定环（MEDLL）的运算复杂度，提高其对选通相关器的抗多径性能，提出了一种用于全球导航卫星系统的组合抗多径方案，即MEDLL上选通相关技术。 (GNSS) 信号处理。短延迟多径射线通过MEDLL机制与频闪相关函数分离；然后计算估计残差与标准相关函数或 BOC-PRN 相关函数之间的点积，以消除潜在的跟踪歧义。最后，这个非相干组合结果被发送到环路滤波器以获得反多径码跟踪。在不同的前端带宽条件下，使用软件接收器通过模拟器数据分析所提出的方法。