摘要
由于目前L1频段的拥挤性和GPSL1C调制方式MBOC(6,1,1/11)的复杂性,系统内和系统间干扰不可避免,并且这些干扰对码跟踪性能的影响不能简单地等价为白噪声进行分析。针对这一特点,提出一种可用于非白色干扰环境下码跟踪精度分析的方法,并用该方法对比分析了GPSL1C、GPSL1C/A码在无干扰和干扰情况下的跟踪性能。分析结果表明:L1C码跟踪精度可比L1C/A提高50%～150%;最坏情况下,同频带导航信号的干扰可导致L1C跟踪误差增加30%。分析过程和分析结果可为接收机设计和兼容性评估提供参考。
In view of the congestion of current L1 band and the complexity of MBOC （6,1,1/11） modulation for GPS L1 C, intrasystem and intersystem interference is inevitable, and the effect on code tracking performance is not equivalent to white noise. This paper presents a code tracking accuracy analysis method which can be applied where the non - white interference exists. The method is used to compare the code tracking performance of GPS L1 C and GPS L1C/A in conditions of with and without interference. Analysis results show that L1C improves 50 to 150 percent in code tracking performance from L1C/A, and the effect of interference from other global navigation satellite system（GNSS） signals in L1 band may cause the code tracking error increase 30 percent in the worst condition. The analysis process and results are useful for receiver design and compatibility evaluation.
出处
《电讯技术》
北大核心
2009年第1期1-7,共7页
Telecommunication Engineering
基金
总装基金资助项目
