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Gating Functions for Multipath Mitigation in GNSS BOC Signals

机译:GNSS BOC信号中用于多路径缓解的门控功能

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摘要

A new multipath mitigation technique is proposed for binary offset carrier (BOC) signals in global navigation satellite systems (GNSS) using the concept of gating function originally conceived for the GPS coarse-acquisition (C/A) code. Specially-tailored pulses are utilized to diminish the number of false-lock points of the code discriminator response and to improve the multipath mitigation capability. The code loop includes only four real correlators (two extra correlators are required for the simplified bump-jumping algorithm with BOC(n,n) signals). Results obtained with BOC(n,n) and BOC(2n,n) signals show that this technique eliminates the multipath ranging errors for reflected rays with relative delays typically above twenty percent of the spreading code chip duration, thus comparing favorably with the conventional receiver correlation techniques.
机译:提出了一种新的多径缓解技术,该技术采用了最初为GPS粗采集(C / A)码设计的选通功能概念,用于全球导航卫星系统(GNSS)中的二进制偏移载波(BOC)信号。利用专门定制的脉冲来减少代码鉴别器响应的错误锁定点的数量,并提高多径缓解能力。该代码循环仅包含四个实际相关器(使用BOC(n,n)信号的简化的凹凸跳跃算法需要两个额外的相关器)。使用BOC(n,n)和BOC(2n,n)信号获得的结果表明,该技术消除了反射射线的多径测距误差,其相对延迟通常超过扩频码片持续时间的20%,因此与常规接收器相比具有优势相关技术。

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