Title : Implementation of quadrature modulation and demodulation Design Object : By implementing quadrature modulation and demodulation of analog signals in digital signal processing, students will have better understanding of sampling and frequency analysis of discrete-time signals. Design Content : Make a MATLAB function which performs quadrature modulation and demodulation for a input signal with anti-aliasing filtering.
标签： Implementation demodulation implementing modulation
上传时间： 2013-12-09
上传用户：蠢蠢66
The UMTS Physical Layer model consists of an end-to-end (transmitter-to-receiver) simulation of the Frequency Division Duplex (FDD) Downlink physical layer for several Dedicated Channels (DCH) as specified by the 3GPP standard (Release 99).
标签： transmitter-to-receiver end-to-end simulation Physical
上传时间： 2014-01-11
上传用户：it男一枚
频率合成技术在现代电子技术中具有重要的地位。在通信、雷达和导航等设备中，它可以作为干扰信号发生器；在测试设备中，可作为标准信号源，因此频率合成器被人们称为许多电子系统的“心脏”。直接数字频率合成（DDS——Digital Direct Frequency Synthesis）技术是一种全新的频率合成方法，是频率合成技术的一次革命。本文主要分析了DDS的基本原理及其输出频谱特点，并采用VHDL语言在FPGA上实现。对于DDS的输出频谱，一个较大的缺点是：输出杂散较大。针对这一缺点本文使用了两个方法加以解决。首先是压缩ROM查找表，
上传时间： 2017-09-28
上传用户：大三三
OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术，实际上OFDM是多载波调制的一种。其主要思想是：将信道分成若干正交子信道，将高速数据信号转换成并行的低速子数据流，调制到在每个子信道上进行传输。正交信号可以通过在接收端采用相关技术来分开，这样可以减少子信道之间的相互干扰 ICI 。每个子信道上的信号带宽小于信道的相关带宽，因此每个子信道上的可以看成平坦性衰落，从而可以消除符号间干扰。而且由于每个子信道的带宽仅仅是原信道带宽的一小部分，信道均衡变得相对容易。
标签： OFDM
上传时间： 2015-02-17
上传用户：hongyun288
FILE NAME: dc_motor.c CHIP TYPE: ATMEGA16 CLOCK FREQUENCY: 8MHZ IDE: VSMStudio COMPILER: AVR-GCC
标签： PWM
上传时间： 2015-03-01
上传用户：abilibili
有多径信道、多普勒频移，瑞利、RICE(莱斯)信道等仿真，QPSK调制和解调等，交织编码。程序经过本人测试，绝对可用，并附上本人测试说明和仿真图像结果-I collected information on 2, how-path channel, Doppler frequency shift, Rayleigh, RICE (Rice) channel, such as simulation, QPSK modulation and demodulation, etc., Interleaved Coded. After I tested the procedure is absolutely available, along with my test images and simulation results indicate.
上传时间： 2015-06-16
上传用户：whtiger
自适应软频率复用技术在长期演进中上行上的应用，主要是如何解决小区边缘干扰问题。对小区边缘干扰提出了自适应软频率复用算法
标签： Interference Inter-cell Frequency Adaptive Reuse Soft for
上传时间： 2016-05-09
上传用户：cococo
[开源 绿色软件] [运行环境 Windows XP/7/8/10] [语言 简体/繁體/English/Unicode] A cool music player. Powered by Bass and BassVis. 极简本地音乐播放器，透明、纯文本界面。支持轻媒体库、歌词、可视化。最小化到托盘，占用资源少，适合边听音乐边工作。 应网友要求，加入了Tag编辑、自动切换列表、播放队列、鼠标手势、均衡器、音频设备选择、全局音量滚轮（托盘区域）、字体设置、极简模式、鼠标穿透、嵌入桌面、简单布局等功能。 homepage> mcool.appinn.me ==================================================== 音频格式APE、FLAC、WavPack、MP3、OGG、TTA、TAK、Musepack、AAC、AC3、WMA、Wav、CD、ALAC、Aiff、MOD、CUE ==================================================== 更新历史: 3336 -2016.3.25 点睛之笔：任意布局（追上foobar2000）。Arbitrary layout (all in one). 3330 -2016.3.10 一体布局之比例调节（初具foobar2000风貌）。Ratio adjust (all in one). 3308 -2015.11.28 歌词微调（在选项>常规>鼠标手势里设置）。Adds function of lyrics tuning. 3306 -2015.11.15 电台模式（整点时切换歌曲或列表，并非在线音乐），以及多声卡支持。Adds radio mode, and multi sound card support. 3300 -2015.10.15 完善细节，修复切歌卡住bug。完美版。Fixes some bugs. 3280 -2015.8.1 简单布局功能。Layout (all in one) function. 3260 -2015.6.1 Win10模式。Win10 mode. 3252 -2015.5.10 任务栏进度条。Taskbar progress display. 3236 -2015.4.10 点睛之笔：透明度调节。Adds function of transparency tuning. 3232 -2015.3.25 自定义软件名（请在mcool.ini中手动修改）。Adds function of customizing app name. 3230 -2015.3.12 Airplay复刻界面。Airplay interface copy. 3218 -2015.1.20 桌面歌词。Desktop lyrics. 3216 -2015.1.12 一体化界面（学习Foobar2000和豆瓣FM）。All in one interface. 3212 -2015.1.6 新增Winamp音效插件支持（学习千千静听），以及滚轮穿透功能（学习Airplay3）。Adds Winamp DSP plugins support, and adds function of wheel transparent. Winamp音效插件下载：http://uploadgeneration.info/Winamp/www.winamp.com/plugins/dsp-effect/5/top-rated.html 3210 -2014.12.28 重要更新：本地音量调节、自定义鼠标键/手势。Adds local volume control, and adds fuction of customizing mouse control / gesture. 3208 -2014.11.25 简化右键菜单，常规项目移到选项窗口。Simplifies the popup menu, moves the general items to option window. 3206 -2014.11.22 新增文本对齐选项，重新设计导航按钮。Adds option of text alignment, and redesigns the buttons of playback. 3202 -2014.11.10 新增播放记忆、片段循环（Hotkey: Ctrl+1/2）和贴边隐藏功能。Adds functions of playback memory, AB repeat and screen side hide. 3200 -2014.11.5 新增无界面选项（先去掉托盘图标，然后Ctrl+Alt+W隐藏界面，Ctrl+Alt+X关闭）。Adds option of no interface. 3191 -2014.8.26 嵌入桌面。Pins to desktop. 3190 -2014.8.19 音乐管理第一步：列表分组。Playlists grouping. 3186 -2014.8.10 基于列表的分级系统（Hotkey:0..5）。Rating system based on playlist. 3181 -2014.8.1 启用新图标（由虹吸墨作者BGLL友情制作）。Uses the new icon. 3180 -2014.7.22 新增Win7任务栏特效。Adds windows 7 taskbar effect. 3166 -2014.6.29 重要更新：自动下载专辑封面（源于歌词迷）。Downloads album covers from geci.me. 3160 -2014.6.1 重要更新：新增极简模式，以及OGG/Opus内置封面显示功能。Adds minimalist mode, and adds function of displaying cover embedded in OGG/Opus. 3152 -2014.5.18 添加托盘右键菜单，新增MP4/M4A(ALAC)内置封面显示功能。Adds systray popup menu, and adds function of displaying cover embedded in MP4/M4A(ALAC). 3151 -2014.5.1 重新设计可视化效果，新增示波器效果。Redesigns visual effects, and adds oscilloscope effect. 3150 -2014.4.20 采用歌词迷API下载歌词。Downloads lyrics from geci.me. 3136 -2014.3.30 加入可选的按钮，以及鼠标穿透功能。Adds function of transparent window. 3132 -2014.3.6 简化界面，向Foobar2K看齐；增加正在播放面板。Simplifies the interface, and adds now playing panel. 3130 -2014.2.26 重要更新：按照专辑分组。Grouping by album. 3120 -2014.2.18 优化字体渲染（Windows7/8下）。Optimizes font rendering in Windows 7/8. 3110 -2014.1.26 点睛之笔：自定义字体颜色。Adds function of customizing font color. 3108 -2013.11.16 Last.fm同步功能（请到主页下载插件）。Last.fm scrobbler support. 3106 -2013.11.8 可回溯的随机播放（学习Airplay 2）。Random playback can be traced back. 3103 -2013.10.12 优化右键菜单。Optimizes popup menu. 3102 -2013.9.30 修改滚动条样式，增加音频缓冲选项。Modifies style of scroll bar, and adds option of audio buffer length. 3100 -2013.9.10 无边框设计；迷你模式也可以不置顶（Hotkey:T）。Borderless designs. 3086 -2013.8.20 增加歌词面板功能。Adds function of lyrics panel. 3082 -2013.8.08 增加在可视化界面显示歌词功能。Adds function of displaying lyrics on visual interface. 3080 -2013.8.01 新增设置字体功能，恢复简单的自动关机功能。Adds function of setting font, and re-adds simple function of auto shutdown. 3060 -2013.6.26 修复在迷你模式停止响应的Bug，去掉自动关机、歌词调整功能。Fixes bug of stop responding in mini mode, and removes functions of auto shutdown and lyrics trimming. 3050 -2013.5.23 增加手势功能。Adds gesture function. 3030 -2013.3.10 增加Aero磨砂玻璃效果[如需源码请联系我]，XP/Win7/8无差别显示，按Insert键开启。Adds aero glass effect. 3020 -2013.2.23 增加简易Tag编辑功能（选中并单击即可，相当于资源管理器中的重命名，按照[歌手 - 歌名][专辑]格式进行编辑）。Adds function of editing audio tags (select and click, edit with [artist - title][album] format). 3010 -2013.1.23 应网友要求，加入读取内嵌CUE、歌词及专辑封面功能。Adds function of reading CUE, LRC and album cover built in media. 3002 -2012.11.03 无按钮设计；微调进度条尺寸。Buttonless design; modifies the size of the progress bar. 3001 -2012.10.15 重要改进，界面即按钮：单击 - 播放/暂停，按住 - 前进。Important update, the interface is a button: Click - Play/Pause, Hold Down - Next. 3000 -2012.9.28 增加Win8模式。Adds Win8 mode option. 2982 -2012.8.26 在Win8下使用微软雅黑字体。Uses Microsoft YaHei font in Windows 8 CHS. 2981 -2012.8.20 视频以插件提供（请到主页下载），增加单曲循环功能。Adds function of repeat track. 2980 -2012.7.26 简化代码，去掉视频和MIDI支持。Removes the video and MIDI support. 2970 -2012.7.20 增加媒体信息显示功能。Adds function of displaying media info. 2960 -2012.6.28 增加专辑封面显示功能（Hotkey:Ins）。Adds function of displaying album cover. 2956 -2012.6.01 再次简化界面。Simplifies the interface again. 2952 -2012.4.28 增加音频设备选择功能：DS、ASIO、WASAPI。Adds function of selecting playback device. 2950 -2012.3.30 *增加滚轮调节音量功能（在托盘，中键静音）和媒体键支持。Adds function of setting volume by mouse wheel (over systray, middle click to mute), and adds multimedia keys support. 2936 -2012.3.17 微调界面，修复物理删除失效的BUG。Fine-tunes the interface, and restores the physical delete function. 2930 -2012.2.27 增加TAK格式支持。Adds TAK format support. 2923 -2012.2.12 紧急修复上一版出现的字体模糊BUG（Vista/Win7下），增加在任务栏显/隐图标功能（Ctrl+T）。Fixes font vague bug for Vista/Win7, and adds showing/hiding icon on taskbar function. 2920 -2012.2.08 微调界面，优化CPU占用（启用背景图片时）。Fine-tunes the interface, and optimizes CPU utilization (while enable background image). 2912 -2012.1.12 增加播放队列功能。Adds playback queue function. 2910 -2011.12.25 改进迷你模式，增加查找功能。Improves mini mode, and adds find function. *注：此功能对杀毒软件过敏，开启方法：按F1进入选项，勾选全局快捷键。The feature is allergic to the anti-virus software.
上传时间： 2016-06-10
上传用户：fanghua
msp430The LDC1312 and LDC1314 are 2- and 4-channel, 1• Easy-to-use – minimal configuration required 12-bit inductance to digital converters (LDCs) for • Measure up to 4 sensors with one IC inductive sensing solutions. With multiple channels • Multiple channels support environmental and and support for remote sensing, the LDC1312 and aging compensation LDC1314 enable the performance and reliability benefits of inductive sensing to be realized at minimal• Multi-channel remote sensing provides lowest cost and power. The products are easy to use, onlysystem cost requiring that the sensor frequency be within 1 kHz • Pin-compatible medium and high-resolution and 10 MHz to begin sensing. The wide 1 kHz to 10 options MHz sensor frequency range also enables use of very small PCB coils, further reducing sensing– LDC1312/4: 2/4-ch 12-bit LDC solution cost and size.– LDC1612/4: 2/4-ch 28
上传时间： 2016-07-22
上传用户：tongmoonsky
We consider the problem of target localization by a network of passive sensors. When an unknown target emits an acoustic or a radio signal, its position can be localized with multiple sensors using the time difference of arrival (TDOA) information. In this paper, we consider the maximum likelihood formulation of this target localization problem and provide efficient convex relaxations for this nonconvex optimization problem.We also propose a formulation for robust target localization in the presence of sensor location errors. Two Cramer-Rao bounds are derived corresponding to situations with and without sensor node location errors. Simulation results confirm the efficiency and superior performance of the convex relaxation approach as compared to the existing least squares based approach when large sensor node location errors are present.
标签： 传感器网络
上传时间： 2016-11-27
上传用户：xxmluo
