CAJ | 학술논문

为了研究现代化的GPS新民用信号仿真系统的设计和实现,介绍了现代化的GPS信号组成及其结构特点,包括L2C,L5和L1C信号.对仿真系统各模块的设计和实施方法进行了详细描述.该信号仿真系统主要包括:参数设置、系统初始化、信号产生、噪声产生、干扰产生、信号合成、低通滤波、A/D转换以及信号存储等主要功能模块.通过Matlab对该信号仿真系统进行仿真,并重点分析了所有导航信号的功率谱密度.结果表明该仿真系统能够完成现代化的GPS新民用信号物理层仿真,并可为现代化的GPS民用接收机尤其是软件接收机的设计和测试提供可控信号源.
위료연구현대화적GPS신민용신호방진계통적설계화실현,개소료현대화적GPS신호조성급기결구특점,포괄L2C,L5화L1C신호.대방진계통각모괴적설계화실시방법진행료상세묘술.해신호방진계통주요포괄:삼수설치、계통초시화、신호산생、조성산생、간우산생、신호합성、저통려파、A/D전환이급신호존저등주요공능모괴.통과Matlab대해신호방진계통진행방진,병중점분석료소유도항신호적공솔보밀도.결과표명해방진계통능구완성현대화적GPS신민용신호물리층방진,병가위현대화적GPS민용접수궤우기시연건접수궤적설계화측시제공가공신호원.
In order to research　on　the　design　and implementation of a modernized GPS civil signals simulation system,a brief review of the modernized GPS signals is introduced,including the signal structure and characteristics of L2C,L5 and L1C signals.The design and implementation of the main modules of the simulation system is described in detail. The　simulation　system　is　mainly　composed　of parameter setting, system initialization, signal generator,noise generator,disturbance generator,signal synthesis,lowpass filter, A/D conversion and storage. The simulation results based on Matlab are then presented,and the power spectral density (PSD) of all navigation signals is analyzed.The simulation system completes the physical layer simulation of a modernized GPS new civil signal and can provide a controllable signal　source　for designing　and　testing　of modernized GPS civil receivers, especially for the signal processing algorithm design of the GPS software receiver.