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Commoditization is a serious threat to the telecommunications industry. Most CSPs offer similar services at rates designed to win what has become a price war. As a result, many face decreasing margins and difficulty sustaining differentiation based on prices or products alone. On top of commoditizat ...

Visible light communications (VLC) is the name given to an optical wireless communication system that carries information by modulating light in the visible spectrum (400–700 nm) that is principally used for illumination [1–3]. The communications signal is encoded on top of the illumination light. ...

Radio frequency identifi cation (RFID) technology is a wireless communication technology that enables users to uniquely identify tagged objects or people. RFID is rapidly becoming a cost-effective technology. This is in large part due to the efforts of Wal-Mart and the Department of Defense (DoD) to ...

LIKE SO MANY OTHERS , THIS BOOK WAS WRITTEN BECAUSE WE COULDN ’ T FIND ONE LIKE IT . We needed something to hand to all of those people who have come to us asking for “a good book to read on RFID.” When we looked for candidates we found some great books, but most were aimed at electrical engineer ...

General paradigm in solving a computer vision problem is to represent a raw image using a more informative vector called feature vector and train a classifier on top of feature vectors collected from training set. From classification perspective, there are several off-the-shelf methods such as gradi ...

题目：基于51单片机的RS485从机系统设计   单片机接口资源配置： 1.   上电复位电路； 2.   晶振电路采用11.0592Mhz晶振； 3.   485接口电路（P3.7用于485芯片的收发控制，收发管脚接单片机的rxd和txd）； 4.   P2口通过外部跳线接相应的高低电平，配置 ...

x=[1,2,0,-1,3,2];h=[1,-1,1]; y1=x*h(1); y2=x*h(2); y3=x*h(3); Y1=[0,0,y1]; Y2=[0,y2,0]; Y3=[y3,0,0]; y=Y1+Y2+Y3; L=-2:1:5; figure(1); subplot(211);stem(L,y,'*'); xlabel('L');ylabel('y');title('(1)'); X=x.';X=X'; r1=X*y(1);r2=X*y(2);r3=X*y(3);r4=X*y(4); r5=X*y(5);r6=X*y(6);r7=X*y(7);r8=X*y(8); R1=[0, ...

l U1960局内用户互拨。 l 局外用户通过自动总机转分机号，呼叫局内非直拨用户。 l 配置IAD的直拨用户，实现IAD直拨用户通过长号与PSTN市话互拨。 l 所有用户通过U1960拨打和接听PSTN市话、手机用户以及长途电话。 l 传真机收发传真。 ...

一 种 基 于 峰 值 跟 随 的 P L C D 传 感 器 信 号 调 理 电 路 及 其 方 法 ， 包 括 正 弦 波 发 生 器 电 路 、 P L C D 传 感 器 、 前 置 处 理 电 ...

PT2262/2272是一对带地址、数据编码功能的红外遥控发射/接收芯片。其中发射芯片PT2262-IR将载波振荡器、编码器和发射单元集成于一身，使发射电路变得非常简洁。 接收芯片PT2272的数据输出位根据其后缀不同而不同，数据输出具有“暂存”和“锁存”两种方式，方便用户使用。后缀为“M”为“暂存型”，后缀为“L”为“锁 ...