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Description: UCOSII下GPS和CDMA控制
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Size: 1495483 |
Author: wfxslx |
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Description: 運用基站號碼去google查詢相對應位置座標的程式 如果你在你的手机装过Google Mobile Maps，你可以发现只要你的手机能连GPRS，即使没有GPS功能，也能定位到你手机所在位置，只是精度不是很精确。在探讨这个原理之前，先让我们了解一下一些移动知识，了解什么是MNC/MCC/LAC/Cell ID。 "Mobile Network Code (MNC) 移动网号码,中国联通CDMA系统的MNC为03,中国移动的应该为00。 "Mobile Country Code (MCC) 移动用户所属国家代号,中国是:460。 "Location Area Code (LAC) 地区区域码,用来划分区域,一般小地方就一个LAC,大地方就有多几个。 "Cell Tower ID (Cell ID) CellID代表一个移动基站,如果你有基站数据,查CellID你就可以知道这个基站在哪里，移动公司或者警察通过这个知道你是在哪个基站范围打的移动电话。 这些信息有什么用呢？ 通过这些信息可以知道你的手机是从哪个国家，区域和哪个基站接入移动网络的。所以有些防盗手机丢失后，会发一些类似"MCC:460;MNC:01;LAC:7198:CELLID:24989"内容的短信到你指定号码就是这个用途，通过这些信息可以从移动查到你的被盗手机在哪里出现过。不过知道了也没用，中国人口这么密集，就是在你身边你也不知道谁是小偷：） 这些信息从哪里来呢，一般的手机系统都提供相应的API来获取这些信息（Tower Info），比如Window SmartPhone 或Mobile就是通过RIL.dll里的API来取得，每个手机操作系统不一样，相关的信息可以查相关资料。 得到了这些信息，如果没有基站信息表，得到了这些信息也不知道在哪，因为只有移动运营商有相关的信息，除非你是运营商或者警察才能得到这些信息。是不是我们就查不到相应的数据呢，当然不是，强大的Google就有，这里就要提到Google Mobile Maps API，里面囊括了比较全的基站信息，中国的也有，就是偏远地区的有没有就不知道了。Google Mobile Maps本身就是使用的这些信息，感兴趣可以试一试，没有GPS模块也能定位到你手机位置，但精度不大，取决于基站的位置离你多远。 同样我们自己也可以开发相应的手机应用来定位，只要调用Google现成的API（Secret AP
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Size: 552920 |
Author: wjj88.tw@yahoo.com.tw |
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Description: 无线定位走来gpsOne 与CDMA技术紧密结合-walked gpsOne wireless location technology and closely integrate CDMA
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Size: 6144 |
Author: 江南 |
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Description: cdma2000由于系统要求基于GPS 的全网同步, 因此对GPS 系统有绝对的依赖性。-cdma2000 system requirements for the entire GPS network synchronization, the GPS system is absolutely dependent.
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Size: 1784832 |
Author: 天宇 |
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Description: 这个程序是TD-S-CDMA系统中,TDOA定位方法的系统程序.-the procedure is TD-S-CDMA system, the TDOA of the system.
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Size: 17408 |
Author: 忘青 |
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Description: CDMA视频传输，基于GPS/CDMA的车辆定位实时视频监控。-CDMA video transmission, based on GPS/CDMA positioning of vehicles in real-time video surveillance.
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Size: 6803456 |
Author: 温庆夫 |
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Description: WINCE usbSER, 把USB 虚拟成COM, 可用于开发USB modem, GPRS, CDMA, 3G 上网等。-wince usbser, conver usb port to COM port, canbe used when develope usb modem, GPS, CDMA,3G modem.
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Size: 43008 |
Author: kong |
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Description: CDMA drive-tester with NMEA GPS support
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Size: 177152 |
Author: Max |
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Description: gps/cdma/gprs 定位导航 c源代码-gps/cdma/gprs GPS navigation c source code
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Size: 1089536 |
Author: progholic |
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Description: EVC编程，关于anydata公司的DTGS-800的拨号程序及来电显示、GPS定位信息发送AT指令，返回相应的经纬度信息。 该软件能够实现拨打电话，位置定位。 根据网友的程序进行更改的。这里感谢本站的网友！-EVC programming, on the anydata' s DTGS-800 dial-up procedures and caller ID, GPS location information to send AT commands, returning the corresponding latitude and longitude information. The software enables phone calls, location, location. According to the netizens procedure changes. Powered netizens here, thanks!
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Size: 4335616 |
Author: gaowei |
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Description: GPS用的串口摄像机的通讯协议。把图象压缩为JPEG文件通过串口送给GPRS/CDMA-GPS cameras with the serial communication protocol
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Size: 18432 |
Author: 屈力 |
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Description: CDMA视频传输，基于GPS CDMA的车辆定位实时视频监控-CMDA
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Size: 6803456 |
Author: bao |
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Description: 基于位置的服务(Location Based Service，LBS)，它是通过电信移动运营商的无线电通讯网络（如GSM网、CDMA网）或外部定位方式(如GPS)获取移动终端用户的位置信息（地理坐标，或大地坐标），在GIS(Geographic Information System，地理信息系统)平台的支持下，为用户提供相应服务的一种增值业务。基于android平台lbs开发源码-Location Based services (Location Based Service, LBS), it is through the telecom mobile operators radio communications network, such as GSM nets, CDMA network) or external localization way (such as GPS) get the position Information of mobile terminal users (Geographic coordinates, or the earth coordinate), in GIS (Geographic Information System, Geographic Information System) platform, with the support of for the user to provide the corresponding services of a value-added Service. Based on the android platform development LBS source code
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Size: 625664 |
Author: dy |
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Description: Direct sequence spread spectrum (DSSS) communication systems has been widely
used in these years for its advantage of wide spectrum, low working Signal-to-Noise
ratio (SNR), anti-interference, anti-multipath effect and capability of LPI and LPD.
They are increasingly replacing conventional communication forms and obtaining
extensively applications in modern military and commercial communication systems,
for example, CDMA communication system, GPS , measuring and control system,
satellite chain, identification of friend or foe and etc. Therefore, corresponding DSSS
electronic counter technique becomes a big problem to solve in electronic warfare
domain. DSSS electronic counter technique including blind detection, blind parameter
estimation and spreading sequences estimation. For the issue of DSSS electronic
counter technique of DSSS/QPSK signal damaged by strong additive white Gaussian
noise (AWGN), the main research content in this dissertation as follow.
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Size: 2061312 |
Author: yangs |
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Description: CDMA USED IN GPS GEOLOCALIZATION
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Size: 10240 |
Author: abdmek |
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Description: 本书从电子技术和通信系统的角度讲解gps接收机的设计开发原理，其内容集中在用户终端，即接收机的设计原理和软件实现上。全书分为两大部分，第一部分为理论篇，第二部分为实现篇。理论篇首先对导航的基本目的进行了阐述，并由一个浅显的二维导航系统对导航信号的特点进行了推导，随后阐述了gps信号格式，同时对于直接影响接收机性能的射频前端部分做了理论分析；实现篇主要对本书实现的软件gps接收机的系统实现和源代码进行了讲解，同时作为总结，将信号处理的结果和有意义的中间变量以图示的方式给出，可以使读者有一个感性的认识，同时提升学习兴趣。.
本书适合从事卫星导航接收机研发的技术人员和卫星通信接收机研究的研究人员，尤其是从事北斗系统研发的专业人员、cdma通信系统研发人员，以及通信电子类专业的高年级本科生和研究生阅读，既可作为教学培训的教材，也可作为相关专业工程技术人员的参考资料。(This book explains the design and development principle of the GPS receiver from the perspective of electronic technology and communication system. Its content focuses on the design principle and software implementation of the user terminal, that is, the receiver. The whole book is divided into two parts. The first part is the theoretical part and the second part is the realization part. Firstly, the basic purpose of navigation is expounded, and the characteristics of navigation signal are deduced by a simple two-dimensional navigation system. Then, the format of GPS signal is expounded. At the same time, the front-end part of radio frequency which directly affects the performance of the receiver is theoretically analyzed.)
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Size: 26814464 |
Author: wongyiu |
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