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首页> 外文期刊>International journal of navigation and observation >On the Impact of Channel Cross-Correlations in High-Sensitivity Receivers for Galileo E1 OS and GPS L1C Signals
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On the Impact of Channel Cross-Correlations in High-Sensitivity Receivers for Galileo E1 OS and GPS L1C Signals

机译：通道互相关对Galileo E1 OS和GPS L1C信号的高灵敏度接收器的影响

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摘要

One of the most promising features of the modernized global navigation satellite systems signals is the presence of pilot channels that, being data-transition free, allow for increasing the coherent integration time of the receivers. Generally speaking, the increased integration time allows to better average the thermal noise component, thus improving the postcorrelation SNR of the receiver in the acquisition phase. On the other hand, for a standalone receiver which is not aided or assisted, the acquisition architecture requires that only the pilot channel is processed, at least during the first steps of the procedure. The aim of this paper is to present a detailed investigation on the impact of the code cross-correlation properties in the reception of Galileo E1 Open Service and GPS L1C civil signals. Analytical and simulation results demonstrate that the S-curve of the code synchronization loop can be affected by a bias around the lock point. This effect depends on the code cross-correlation properties and on the receiver setup. Furthermore, in these cases, the sensitivity of the receiver to other error sources might increase, and the paper shows how in presence of an interfering signal the pseudorange bias can be magnified and lead to relevant performance degradation.
机译：现代化的全球导航卫星系统信号最有前途的特征之一是导频信道的存在，这些导频信道无数据转换，从而增加了接收机的相干积分时间。一般而言，增加的积分时间可以更好地平均热噪声成分，从而改善了采集阶段接收机的后相关SNR。另一方面，对于无辅助或无辅助的独立接收机，采集架构至少在该过程的最初步骤中要求仅处理导频信道。本文的目的是对代码互相关属性对Galileo E1开放服务和GPS L1C民用信号的接收的影响进行详细研究。分析和仿真结果表明，代码同步循环的S曲线可能会受到锁定点周围的偏置的影响。这种影响取决于代码互相关属性和接收器设置。此外，在这些情况下，接收器对其他误差源的灵敏度可能会增加，并且本文显示了在存在干扰信号的情况下，伪距偏差如何被放大并导致相关性能下降。

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  • 来源
    《International journal of navigation and observation》 |2012年第2012期|132078.1-132078.10|共10页
  • 作者

    Davide Margaria; Beatrice Motella; Fabio Dovis;

  • 作者单位

    Istituto Superiore Mario Boella, Via P.C. Boggio 61, 10138 Torino, Italy;

    Istituto Superiore Mario Boella, Via P.C. Boggio 61, 10138 Torino, Italy;

    Department of Electronics and Telecommunications, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;

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