基于DSP芯片的嵌入式车载GPS定位系统研究  

Study About Embedded Vehicle GPS Positioning System based on DSP Chip

作　　者：李倩[1] 崔晓萍[1] 

机构地区：[1]泰山职业技术学院信息工程系,山东泰山271000

出　　处：《洛阳理工学院学报（自然科学版）》2011年第4期60-64,共5页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

摘　　要：鉴于DSP芯片的高性能低功耗特别适合数字信号的各种滤波,设计了基于DSP的GPS/DR定位系统。首先对车载定位的发展进行介绍,进而阐述了GPS/DR的定位原理,重点介绍了基于联合扩展KALMAN滤波算法的GPS/DR的定位算法研究,并用MATLAB 7.0仿真了扩展K ALMAN滤波的性能。在采用联合扩展卡尔曼滤波结构中,分别设计GPS、GPS/DR组合导航子滤波器。同时基于DSP的GPS/DR定位系统软硬件设计,介绍了GPS接收器电路、陀螺仪电路、里程计和行使方向电路、扩展存储器与DSP的连接电路及DSP的最小系统,最后总结和分析了实验结果,论证了方案的优越性。As DSP Chip＇s high performance and low power consumption is suitable for various kinds of filter in digital signal, the author designs GPS/DR positioning system based on DSP chip. The paper firstly introduces the development of vehicle positioning, And then elaborates positioning principle of GPS/DR. It mainly introduces the study of Location Algorithm of GPS/DR based on Expansion joint KALMAN Filtering algoritbm, and uses MATLAB 7.0 to simulate performance of the extended KALMAN filter. In adopting the joint extended Kalman filter structure, the author designs navigation sub-filter of GPS 、 GPS/DR. Based on GPS/DR positioning system design based on DSP, the author introduces GPS receiver circuit, gyroscope circuit, odometer and the circuit of direction, and connection circuits between extended memory and DSP, DSP＇s minimum system, at last, the author summarizes and analyzes experimental results and demonstrates tbe superiority of the program.

关 键 词：DSP航位推算 GPS定位导航系统 联合扩展卡尔曼滤波 

分 类 号：TP311.5[自动化与计算机技术—计算机软件与理论]