作者:John W. Betz、Kevin R. Kolodziejski
DOI:10.1002/j.2161-4296.2000.tb00215.x
日期:2000.9
Code-tracking accuracy, an important attribute of GPS receivers, depends both on characteristics of the signal being tracked and on the design of the receiver. A simple expression has been available to predict code-tracking accuracy for early-late processing of signals with sinc-squared spectra in white noise for an infinite front-end bandwidth receiver. However, the literature has not indicated when
: 代码跟踪精度是 GPS 接收器的一个重要属性,它取决于被跟踪信号的特性和接收器的设计。一个简单的表达式可用于预测无限前端带宽接收器在白噪声中具有 sinc 平方频谱的信号的早期后期处理的代码跟踪精度。然而,文献没有指出这种近似值何时成立。本文对处理白噪声中传统二进制相移键控信号的早晚鉴别器的代码跟踪精度进行了更精确的分析。新的分析表达式适用于各种前端带宽、鉴别器间距和代码跟踪环路带宽,同时使用基于小误差假设的线性模型。还提供了理论下限,指示给定条件下精度的固有限制。虽然精确表达式的评估需要数值积分,但也提供了新的代数近似。数值结果比较了各种表达式和近似值。