A Signal to Noise Ratio Simulation Algorithm Applied to GPS Software Signal Source

ZHANG Dong; LI Jin-hai; OU Song-lin; ZENG Dan-dan

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A Signal to Noise Ratio Simulation Algorithm Applied to GPS Software Signal Source

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- A Signal to Noise Ratio Simulation Algorithm Applied to GPS Software Signal Source
- Vol. 34, Issue 3, Pages: 10-14(2017)
- 作者机构：
  
  1. 中国科学院机构微电子研究所,北京,100029
  2. 中国科学院大学机构,北京,101408
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2017
- 稿件说明：
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张东, 李金海, 欧松林, 曾丹丹. 一种适用于GPS软件信号源的信噪比模拟算法[J]. 微电子学与计算机, 2017, 34(3): 10-14.

ZHANG Dong, LI Jin-hai, OU Song-lin, et al. A Signal to Noise Ratio Simulation Algorithm Applied to GPS Software Signal Source[J]. 2017, 34(3): 10-14.
张东, 李金海, 欧松林, 曾丹丹. 一种适用于GPS软件信号源的信噪比模拟算法[J]. 微电子学与计算机, 2017, 34(3): 10-14. DOI：

ZHANG Dong, LI Jin-hai, OU Song-lin, et al. A Signal to Noise Ratio Simulation Algorithm Applied to GPS Software Signal Source[J]. 2017, 34(3): 10-14. DOI：

摘要

为了解决GPS中频导航信号的信噪比模拟问题

根据导航信号的特性

通过对信噪比公式中信号功率和噪声功率计算式的修正

使得参与信噪比计算的信号功率和噪声功率更为接近真实情况

得到更为准确的信噪比值.最后通过软件接收机输出载噪比值与模拟器预设值进行对比

实验测试结果表明: 对于单通道

在36.1~50.1 dBHz载噪比区间

信噪比模拟精度能够达到0.1 dB; 对于多通道

在36.1~48.1 dBHz载噪比区间

信噪比模拟精度约为0.23 dB.总体来说

修正的信噪比估算方法模拟的信噪比精度比原有方法更高

可广泛的用于测试软件接收机性能.

Abstract

In order to solve the problem of signal to noise ratio simulation of GPS intermediate frequency navigation signal

according to the characteristic of the navigation signal

the calculation of signal power and noise power are modified in the signal to noise ratio formula. The signal power and noise power of the signal to noise ratio formula is more close to the real situation

so it can get more accurate signal to noise ratio. Finally

the comparison between the output result of the software receiver and the default value of signal source is made. The simulation results show that the signal to noise ratio accuracy can reach 0.1dB within the range of 36.1dBHz-50.1dBHz for single channel and the signal to noise ratio simulation accuracy is about 0.23dB within the range of 36.1dBHz-48.1dBHz for multichannel. Overall speaking

the new method can be widely used to test the performance of software receiver because the signal to noise ratio simulation method is more accurate than original method.

关键词

Keywords

references

Lei Dong. IF GPS signal simulator development and verification[D]. Canada, Alberta, University of Calgary, 2003.

吴大正. 信号与线性系统分析[M]. 4版. 北京: 高等教育出版社, 2005.

巴晓辉, 罗士栋, 陈杰. GPS/BDS卫星导航信号数字中频数据生成方法[C]//第七届中国卫星导航学术年会论文集-S08北斗/GNSS测试评估技术. 中国, 长沙, 2016.

刘长松, 苟鹏飞, 来逢昌, 等. GPS频域相关捕获算法的Matlab/C实现[J]. 微电子学与计算机, 2009, 26(4): 193-196. DOI: 193

宋峙峰, 崔嵬, 付竹, 等. 一种新的多通道扩频接收机中频噪声模拟算法[J]. 电子与信息学报, 2010, 32(7): 1703-1706. DOI: 1703

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