北斗二代频段信号调制优化性能研究

发布时间：2018-06-07 15:38

  本文选题：二进制偏移载波 + 码跟踪误差　； 参考：《计算机仿真》2016年11期

【摘要】：为了高效利用有限的导航频带资源以及更好的与其它导航系统兼容,提高导航定位精度,提出北斗二代卫星导航系统将采用BOC(Binary Offset Carrier)族调制方式来取代目前使用的QPSK调制方式。针对北斗B1、B2和B3频段信号,深入分析了信号特征及相应的具体调制方式,推导了相应频段调制信号的自相关函数和功率谱密度,从均方根带宽、码跟踪误差、多径包络误差和捕获精度等角度测试,评估北斗BOC族调制信号的性能,并与GPS C/A码信号进行对比。仿真结果表明,北斗二代BOC族调制信号捕获灵敏度低,但在码跟踪精度和多径误差等方面具有明显的优势,且具有频谱分离特性,可以有效的利用和共享频段资源。
[Abstract]:In order to make efficient use of limited navigation frequency band resources and better compatibility with other navigation systems and improve navigation positioning accuracy, it is proposed that Beidou second generation satellite navigation system will adopt BOC(Binary Offset Carrier family modulation to replace the current QPSK modulation. For the Beidou B1B2 and B3 band signals, the characteristics of the signals and the corresponding modulation modes are analyzed in depth. The autocorrelation function and power spectral density of the modulated signals in the corresponding frequency bands are derived. The root mean square bandwidth and code tracking errors are derived. The performance of Beidou BOC family modulation signal is evaluated by the angle measurement of multi-path envelope error and acquisition accuracy, and compared with that of GPS C / A code signal. The simulation results show that the Beidou second generation BOC family has low acquisition sensitivity, but it has obvious advantages in code tracking accuracy and multipath error, and has the characteristics of spectrum separation, which can effectively utilize and share the frequency band resources.
【作者单位】： 大连大学信息工程学院;
【基金】：辽宁省教育厅科学研究项目(L2013461)
【分类号】：TN967.1
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本文编号：1991698