任意周期信号非相干测距技术研究

摘要

In TT&C system, the less correlation between signals from uplink and downlink, the more flexibility is provided for signal system selection. This helps to introduce advance signal transmission and process technique and improve uplink and downlink signal design flexibility. The shortages of conventional coherent and non-coherent ranging technique are analyzed. Based on the phase comparison concept, a non-coherent ranging method using arbitrary periodical signal is derived, and the related range ambiguity and range accuracy affecting ranging characteristics are researched and analyzed. The method is checked by numerical simulation. The result shows that not only uplink and downlink signals can be designed independently, but also the signal systems in uplink and downlink can be combined and utilized in various form to reduce further signal design complexity based on current signal transmission system with the same accuracy requirements. This method can be applied to TT&C and information transmission applications for vehicles in space, near space and airspace.%飞行器测控系统上、下行链路信号关联性越小,则信号体制的可选择性越大,有利于在飞行器测控系统中引进先进信号传输处理技术并提高上下行信号设计的灵活性.分析了传统相干与非相干测距技术的不足；在比相测距法原理基础上,推导出利用任意周期信号实现飞行器非相干测距的方法；对影响测距指标的距离模糊问题、测距精度问题进行了研究分析；对所研究的方法进行了数值仿真.结果表明采用此方法不仅可使测控系统上下行信号设计达到独立设计的目标,而且在保证同等精度要求的条件下,上下行链路信号体制可通过不同形式进行组合使用,在现有传输体制基础上可进一步降低测控信号设计的复杂度,适用于空天、临近空间及航空等不同环境下的飞行器测控与信息传输应用.