摘要随着手机、平板电脑、可穿戴设备等新型移动设备的流行，物联网的性能飞速增长和基于位置感知的应用的激增，位置感知发挥了越来越重要的作用。在室内和室外的环境下，连续地为可靠地提供位置信息可以为用户带来更好地用户体验。目前大部分定位技术都是采用GPS技术来实现定位的，在室外能够起到比较好的效果但如果在室内要实现定位就会出现很大的偏差，这是因为GPS信号经过墙体后衰减非常厉害，甚至无法进入室内，所以很难用GPS技术来实现WiFi室内定位技术是众多室内定位技术中的一种通过WiFi定位技术能够弥补GPS在室内环境下定位不准或无法定位的缺点。同时还能能够提供更为精确的室内定位服务。虽然主流的定位技术还有RFID、Zigbee、蓝牙、红外线等技术，不过这些新兴定位技术仍有各自的限制，其主要原因是需要部署专属的定位网络系统，且需耗费更大的建设成本。相比较之下，通过WiFi来实现室内定位具有较大优势关键字：单片机，WIFI，室内，定位WIRELESSLANAbstractInjustthepastfewyears,wirelessLANshavecometooccupyasignificantnicheinthelocalareanetworkmarket.Increasingly,organizationsarefindingthatwirelessLANsareanindispensableadjuncttotraditionalwiredLANs,astheysatisfyrequirementsformobility,relocation,adhocnetworking,andcoverageoflocationsdifficulttowire.Asthenamesuggests,awirelessLANisonethatmakesuseofawirelesstransmissionmedium.Untilrelativelyrecently,wirelessLANswerelittleused;thereasonsforthisincludedhighprices,lowdatarates,occupationalsafetyconcerns,andlicensingrequirements.Astheseproblemshavebeenaddressed,thepopularityofwirelessLANshasgrownrapidly.Inthissection,wefirstlookattherequirementsforandadvantagesofwirelessLANs,andthenpreviewthekeyapproachestowirelessLANimplementation.Keywords:wirelessLANs目录摘要................................................................................................................................2ABSTRACT...................................................................................................................31引言.............................................................................................................................51.1研究背景...........................................................................................................51.2国内外现状.......................................................................................................51.3本文研究目的及意义..........................................................................................62.系统总体方案.............................................................................................................62.1.系统设计思路..........................................................................................................62.2元器件选型.............................................................................................................72.2.1芯片选型.............................................................................................................72.2.2WIFI模块选型...................................................................................................7第3章音乐灯光控制系统硬件设计............................................................................83.1音乐信号的采集...............................................................................................83.1.1音频放大电路的设计.............................................................................83.1.2采样定理.......................................................................................
