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介绍了基于GP4020的GPS接收机的电路设计及软件设计。GP4020是ZARLINK公司推出的GPS接收机数字基带处理器,内部集成了12通道的相关器和先进的ARM7TDMI微处理器,因而减少了GPS接收机设计的复杂程度;同时,GP4020与GP2010或GP2015直接相连,组成了GPS导航系统。 相似文献
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GPS软件接收机信号实时接收与传输技术 总被引:1,自引:0,他引:1
基于GP2015射频芯片和TMS320C6713 DSP处理器,提出了一种GPS软件接收机信号实时接收及传输的基本方案。介绍了射频前端的基本构造以及它与DSP进行高速实时传输的接口方案,并且重点描述了一种基于EDMA数据传输方式的实现及完整的软件设计流程。本方案利用EDMA在CPU后台高效地实现存储空间的数据搬移,减少对CPU的使用,提高了平台运行速度,满足GPS软件接收机高速实时性要求。 相似文献
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本系统以ARM处理器和μLC/OS-Ⅱ为平台,通过GPS接收机获取GPS信息,并对转换处理后的地理信息与校园地图信息进行匹配,实现精确的校园定位和导航。 相似文献
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沈小虎 《单片机与嵌入式系统应用》2003,(1):280-282
PCI9052是PIX公司推出的一种PCI总线从属接口芯片(不具有DMA功能).它提供了方便的本地总线与PCI总线的接口,避免用户直接面对复杂的PCI总线协议.GP2010是通用电器公司Plessey半导体机构为全球定位系统(GPS)接收机设计的第二代射频高频端器件.它将GPS射频信号下变频到4.309 MHz的中频(IF)后进行5.714 MHz的2bit(A/D)量化.文中主要介绍如何利用PCI9052和GP2010实现GPS信号的量化存储. 相似文献
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沈小虎 《单片机与嵌入式系统应用》2003,(2):40-42,48
PCI9052是PLX公司推出的一种PCI总线从属接口芯片(不具有DMA功能)。它提供了方便的本地总线与PCI总线的接口,避免用户直接面对复杂的PCI总线协议,GP2010是通用电器公司Plessey半导体机构为全球定位系统(GPS)接收机设计的第二代射频高频端器件,它特GPS射频信号下变频到4.309MHz的中频(IF)后进行5.71Mhz的2bit(A/D)量化,文中主要介绍如何利用PCI90525和GP2010实现GPS信号的量化存储。 相似文献
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提出一种基于GPS/GPRS/GIS平台的巡警监管系统的设计方法,为巡警管理部门提供一个直观、便捷和实时的监管平台,可以大大加强对巡警的监管力度,进而有效提高巡警的工作效率.系统使用Oracle数据库来存储系统的空间数据和属性数据,确保系统数据的快速访问和高可靠性.依据本平台设计的巡警监管系统在辽宁某市巡警部门已经进行实际应用,并取得了良好的效果. 相似文献
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MC68HC908GP32单片机编程器的设计与实现 总被引:6,自引:0,他引:6
在分析Motorola M68HC08系列MCU的Flash存储器编程模式基础上,提出了MC68HC908HP32芯片的一种简明而实用的编程器设计方案,给出了基本设计思想,硬件设计电路,软件设计框架,并与Motorola公司提供的电路进行了对比分析。 相似文献
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本文介绍了一种基于ARM9微处理器的GPS接收机的设计。该GPS接收系统采用Zarlink公司生产的专用芯片GP2015,配合外围电路作为接收机的超小型射频前端,应用GP2021芯片和S3C2410处理器作为接收机的数字基带处理器。 相似文献
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一种微控制器的倒车雷达系统的设计 总被引:1,自引:1,他引:0
设计实现了一种倒车用超声波测距仪;系统以MC68HC908GP32型微控制器为核心进行模块化设计,采用4路探头进行超声波的发射和接收,通过通道选择电路对四路回波进行循环检测;回波信号经多重反馈带通滤波放大电路和过零比较电路后,触发定时器的输入捕捉中断,微控制器存储回波往返时间,经过温度校正和运算后送所测最短距离进行显示并报警;经调试该仪器能满足1.5m范围内的距离测距要求,测量"盲区"小于20 cm,具有高的精确度和可靠性;适当改进后可用于其它短距离测距要求的相关系统中. 相似文献
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针对当前产生式编程方法不能有效地应用于复杂软件系统(如信息系统)的开发,不能在分析和设计的层次上复用软件等问题,本文提出了一种基于特征精化的产生式编程方法,基本思想是首先使用特征模型(Feature Model)描述领域内的概念和特征,然后使用特征精化的方法将特征精化为基本特征,用基本特征和之间的关系说明特征是如何实现的,最后将基本特征映射为组件,根据系统的特征模型组装组件,构建整个软件系统。基于特征精化的产生式编程方法是建立在特征和组件的基础上的,适用于信息系统类软件的开发。 相似文献
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This paper presents a new generalized particle (GP) approach to dynamical optimization of network bandwidth allocation, which can also be used to optimize other resource assignments in networks. By using the GP model, the complicated network bandwidth allocation problem is transformed into the kinematics and dynamics of numerous particles in two reciprocal dual force-fields. The proposed model and algorithm are featured by the powerful processing ability under a complex environment that involves the various interactions among network entities, the market mechanism between the demands and service, and other phenomena common in networks, such as congestion, metabolism, and breakdown of network entities. The GP approach also has the advantages in terms of the higher parallelism, lower computation complexities, and the easiness for hardware implementation. The properties of the approach, including the correctness, convergency and stability, are discussed in details. Simulation results attest to the effectiveness and suitability of the proposed approach. 相似文献
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《Advanced Robotics》2013,27(7):749-762
This paper proposes a method of robot navigation in outdoor environments based upon panoramic view and Global Positioning System (GPS) information. Our system is equipped with a GPS navigator and a camera. The route scene can be described by three-dimensional objects extracted as landmarks from panoramic representations. For an environment having limited routes, a two-dimensional map can be made based upon routes scenes, assuming that the topological relation of routes at intersections is known. By using GPS information, the global position of a mobile robot can be known, and a coarse-to-fine method is used to generate an outdoor environment map and locate a mobile robot. First, a robot finds its approximate position based on the GPS information. Then, it identifies its location from the image information. Experimental results in outdoor environments are given. 相似文献
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Discovering approximate expressions of GPS geometric dilution of precision using genetic programming
Chih-Hung Wu Ya-Wei Ho Li-Wun Chen You-Dong Huang 《Advances in Engineering Software》2012,45(1):332-340
Global Positioning System (GPS) has been used extensively in various fields. Geometric Dilution of Precision (GDOP) is an indicator showing how well the constellation of GPS satellites is organized geometrically, so as a reliability indicator presenting the GPS positioning accuracy. Traditional methods for calculating GPS GDOP need to solve the measurement equations where involve complicated matrix transformation and inversion. Some studies rephrase the calculation of GPS GDOP a regression problem and employ “black-boxed” machine learning methods for problem solving. However, the regression models obtained from such methods lack of expressivity for describing the relationships among variables. Making the structures of GDOP expressions visible is valuable because they can be further studied or tailored for specific GPS applications. This study employs the technique of genetic programming (GP) for the regression of GPS GDOP. The performance of GP working with various operators and parameter settings is studied and discussed. The experimental results show that GP generates precise models with better expressivity for GPS GDOP than other methods. 相似文献