定位已经进入了千家万户，大家听过最常见的可能是美国的GPS，中国的北斗，但其实还有很多辅助定位。 本文仅仅聊聊这几种定位方式的区别。 原理：接收机接收卫星广播信号，成功定位至少需要4颗卫星，接收机通过与4颗卫星的距离算出自己的坐标。 大家 ...

本文分享定位相关知识，目前主流的定位方式有GPS、LBS、AGPS、WiFi、iBeacon等几种，本文主要阐述其区别。本文暂不讨论北斗，GLONASS、GALILEO，这几个定位原理同GPS。 一、GPS定位 原理：接收机接收卫星广播信号，成功定位至少需要4颗卫星，接收机通过与4颗卫星的 ...

Qualcomm has licensed Skyhook Wireless's Wi-Fi Positioning System (WPS), a method of combining massive professional wardriving databases with geographical latitude and longitude. WPS can be used to ...

The Global Positioning Satellite (GPS) system can help you find yourself, or the nearest drycleaner, or a missing Christmas manger, or a hidden geocache. But our expectations of GPS are that it works ...

We've come across a number of GPS-based tracking devices over the years but most are rather bulky and difficult to setup. eTrak's attempting to remedy this here at CTIA 2013 with GPS+, a fob-like ...

相信使用GPS的朋友都有过类似的经历，在路过高架桥或者穿过隧道的时候，面对于失去连接的GPS接收器，我们除了烦恼和叹气之外毫无办法。但受于GPS工作原理的限制，我们现在只能够采取一些外部方式来解决此类无法接收信号的问题，目前最流行的做法是采用 ...

·蓝牙、WIFI、GPS……还缺啥功能？ 三星相机在附加功能上一项给我们很厚道的感觉，还记得年初小长焦相机刚刚流行的时候 ...

在物联网万物互联的驱动下，嵌入式WiFi芯片市场成为近两年来“引爆点”， 2016年的总出货量达到1亿颗左右。国内外WiFi芯片和模组厂商纷纷亮剑… WiFi概念 WiFi是WLAN（无线局域网，Wireless Local Area Network）目前最主流的一种技术，基于IEEE802.11系列协议。KXfesmc WiFi ...

The Pod 2 might be the most affordable pet location tracker on the market, but its quirks make it frustrating to use. Let's start with price. The Pod 2 costs $199 and has no fees for first year. But ...

The Pod 2 might be the most affordable pet location tracker on the market, but its quirks make it frustrating to use. Let's start with price. The Pod 2 costs $199 and has no fees for first year. But ...

While we focused more on Texas Instruments' eye-catching OMAP4 development device when we visited the company a few weeks ago, we also had a chance to talk to their wireless chipset team. TI's combo ...

关闭WiFi也是很多人常用的省电操作。一旦没有使用WiFi的需求，大家纷纷关掉手机中的WiFi开关，似乎这就能节省电量。然而，真相真的如此吗？ 首先，WiFi开关无论开启与否，WiFi模块在不工作的时候，基本是不会耗电的。WiFi最耗电的时候，是传输数据时。