CAPS模拟器基带控制关键技术

Key techniques of base-band control in CAPS simulator

以我国自主创新的CAPS(China area positioning system)导航定位系统为研究平台,提出了CAPS卫星信号模拟器的系统架构,给出了总体设计框图,对各模块的功能进行了划分和设计。针对CAPS导航系统的特点,开展了模拟器关键技术的研究,给出了相关参数的计算方法。利用已开发出的成型的CAPS模拟器进行测试,结果表明:本文的设计方法是可行的,该模拟器可以用于测试接收机的捕获、跟踪和定位性能等。

The research of the key techniques of base-band control is of great importance based on China Area Positioning System（CAPS） as the research platform.The system framework of the simulator is developed.A signal simulator of the CAPS was studied.The general block diagram was given,and the function of each module was divided and planned.The generation of satellite position parameters,the simulation of the ionosphere delay.The control of carrier DCO and code DCO are the key techniques that must be solved for the development of the CAPS simulator.In accordance with the characteristics of CAPS,the formulas of the relevant parameters were given.Based on these techniques,the CAPS simulator was developed.Test results show that the design is feasible,and the CAPS simulator can be applied to test the performance of the receiver on signal acquisition,signal tracking and positioning.