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.
標(biāo)簽: Implementation demodulation implementing modulation
上傳時間: 2013-12-09
上傳用戶: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).
標(biāo)簽: transmitter-to-receiver end-to-end simulation Physical
上傳時間: 2014-01-11
上傳用戶:it男一枚
頻率合成技術(shù)在現(xiàn)代電子技術(shù)中具有重要的地位。在通信、雷達和導(dǎo)航等設(shè)備中,它可以作為干擾信號發(fā)生器;在測試設(shè)備中,可作為標(biāo)準(zhǔn)信號源,因此頻率合成器被人們稱為許多電子系統(tǒng)的“心臟”。直接數(shù)字頻率合成(DDS——Digital Direct Frequency Synthesis)技術(shù)是一種全新的頻率合成方法,是頻率合成技術(shù)的一次革命。本文主要分析了DDS的基本原理及其輸出頻譜特點,并采用VHDL語言在FPGA上實現(xiàn)。對于DDS的輸出頻譜,一個較大的缺點是:輸出雜散較大。針對這一缺點本文使用了兩個方法加以解決。首先是壓縮ROM查找表,
標(biāo)簽: 頻率合成技術(shù) 現(xiàn)代電子 導(dǎo)航 通信
上傳時間: 2017-09-28
上傳用戶:大三三
OFDM(Orthogonal Frequency Division Multiplexing)即正交頻分復(fù)用技術(shù),實際上OFDM是多載波調(diào)制的一種。其主要思想是:將信道分成若干正交子信道,將高速數(shù)據(jù)信號轉(zhuǎn)換成并行的低速子數(shù)據(jù)流,調(diào)制到在每個子信道上進行傳輸。正交信號可以通過在接收端采用相關(guān)技術(shù)來分開,這樣可以減少子信道之間的相互干擾 ICI 。每個子信道上的信號帶寬小于信道的相關(guān)帶寬,因此每個子信道上的可以看成平坦性衰落,從而可以消除符號間干擾。而且由于每個子信道的帶寬僅僅是原信道帶寬的一小部分,信道均衡變得相對容易。
標(biāo)簽: OFDM
上傳時間: 2015-02-17
上傳用戶:hongyun288
FILE NAME: dc_motor.c CHIP TYPE: ATMEGA16 CLOCK FREQUENCY: 8MHZ IDE: VSMStudio COMPILER: AVR-GCC
標(biāo)簽: PWM
上傳時間: 2015-03-01
上傳用戶:abilibili
有多徑信道、多普勒頻移,瑞利、RICE(萊斯)信道等仿真,QPSK調(diào)制和解調(diào)等,交織編碼。程序經(jīng)過本人測試,絕對可用,并附上本人測試說明和仿真圖像結(jié)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.
上傳時間: 2015-06-16
上傳用戶:whtiger
自適應(yīng)軟頻率復(fù)用技術(shù)在長期演進中上行上的應(yīng)用,主要是如何解決小區(qū)邊緣干擾問題。對小區(qū)邊緣干擾提出了自適應(yīng)軟頻率復(fù)用算法
標(biāo)簽: Interference Inter-cell Frequency Adaptive Reuse Soft for
上傳時間: 2016-05-09
上傳用戶:cococo
[開源 綠色軟件] [運行環(huán)境 Windows XP/7/8/10] [語言 簡體/繁體/English/Unicode] A cool music player. Powered by Bass and BassVis. 極簡本地音樂播放器,透明、純文本界面。支持輕媒體庫、歌詞、可視化。最小化到托盤,占用資源少,適合邊聽音樂邊工作。 應(yīng)網(wǎng)友要求,加入了Tag編輯、自動切換列表、播放隊列、鼠標(biāo)手勢、均衡器、音頻設(shè)備選擇、全局音量滾輪(托盤區(qū)域)、字體設(shè)置、極簡模式、鼠標(biāo)穿透、嵌入桌面、簡單布局等功能。 homepage> mcool.appinn.me ==================================================== 音頻格式APE、FLAC、WavPack、MP3、OGG、TTA、TAK、Musepack、AAC、AC3、WMA、Wav、CD、ALAC、Aiff、MOD、CUE ==================================================== 更新歷史: 3336 -2016.3.25 點睛之筆:任意布局(追上foobar2000)。Arbitrary layout (all in one). 3330 -2016.3.10 一體布局之比例調(diào)節(jié)(初具foobar2000風(fēng)貌)。Ratio adjust (all in one). 3308 -2015.11.28 歌詞微調(diào)(在選項>常規(guī)>鼠標(biāo)手勢里設(shè)置)。Adds function of lyrics tuning. 3306 -2015.11.15 電臺模式(整點時切換歌曲或列表,并非在線音樂),以及多聲卡支持。Adds radio mode, and multi sound card support. 3300 -2015.10.15 完善細(xì)節(jié),修復(fù)切歌卡住bug。完美版。Fixes some bugs. 3280 -2015.8.1 簡單布局功能。Layout (all in one) function. 3260 -2015.6.1 Win10模式。Win10 mode. 3252 -2015.5.10 任務(wù)欄進度條。Taskbar progress display. 3236 -2015.4.10 點睛之筆:透明度調(diào)節(jié)。Adds function of transparency tuning. 3232 -2015.3.25 自定義軟件名(請在mcool.ini中手動修改)。Adds function of customizing app name. 3230 -2015.3.12 Airplay復(fù)刻界面。Airplay interface copy. 3218 -2015.1.20 桌面歌詞。Desktop lyrics. 3216 -2015.1.12 一體化界面(學(xué)習(xí)Foobar2000和豆瓣FM)。All in one interface. 3212 -2015.1.6 新增Winamp音效插件支持(學(xué)習(xí)千千靜聽),以及滾輪穿透功能(學(xué)習(xí)Airplay3)。Adds Winamp DSP plugins support, and adds function of wheel transparent. Winamp音效插件下載:http://uploadgeneration.info/Winamp/www.winamp.com/plugins/dsp-effect/5/top-rated.html 3210 -2014.12.28 重要更新:本地音量調(diào)節(jié)、自定義鼠標(biāo)鍵/手勢。Adds local volume control, and adds fuction of customizing mouse control / gesture. 3208 -2014.11.25 簡化右鍵菜單,常規(guī)項目移到選項窗口。Simplifies the popup menu, moves the general items to option window. 3206 -2014.11.22 新增文本對齊選項,重新設(shè)計導(dǎo)航按鈕。Adds option of text alignment, and redesigns the buttons of playback. 3202 -2014.11.10 新增播放記憶、片段循環(huán)(Hotkey: Ctrl+1/2)和貼邊隱藏功能。Adds functions of playback memory, AB repeat and screen side hide. 3200 -2014.11.5 新增無界面選項(先去掉托盤圖標(biāo),然后Ctrl+Alt+W隱藏界面,Ctrl+Alt+X關(guān)閉)。Adds option of no interface. 3191 -2014.8.26 嵌入桌面。Pins to desktop. 3190 -2014.8.19 音樂管理第一步:列表分組。Playlists grouping. 3186 -2014.8.10 基于列表的分級系統(tǒng)(Hotkey:0..5)。Rating system based on playlist. 3181 -2014.8.1 啟用新圖標(biāo)(由虹吸墨作者BGLL友情制作)。Uses the new icon. 3180 -2014.7.22 新增Win7任務(wù)欄特效。Adds windows 7 taskbar effect. 3166 -2014.6.29 重要更新:自動下載專輯封面(源于歌詞迷)。Downloads album covers from geci.me. 3160 -2014.6.1 重要更新:新增極簡模式,以及OGG/Opus內(nèi)置封面顯示功能。Adds minimalist mode, and adds function of displaying cover embedded in OGG/Opus. 3152 -2014.5.18 添加托盤右鍵菜單,新增MP4/M4A(ALAC)內(nèi)置封面顯示功能。Adds systray popup menu, and adds function of displaying cover embedded in MP4/M4A(ALAC). 3151 -2014.5.1 重新設(shè)計可視化效果,新增示波器效果。Redesigns visual effects, and adds oscilloscope effect. 3150 -2014.4.20 采用歌詞迷API下載歌詞。Downloads lyrics from geci.me. 3136 -2014.3.30 加入可選的按鈕,以及鼠標(biāo)穿透功能。Adds function of transparent window. 3132 -2014.3.6 簡化界面,向Foobar2K看齊;增加正在播放面板。Simplifies the interface, and adds now playing panel. 3130 -2014.2.26 重要更新:按照專輯分組。Grouping by album. 3120 -2014.2.18 優(yōu)化字體渲染(Windows7/8下)。Optimizes font rendering in Windows 7/8. 3110 -2014.1.26 點睛之筆:自定義字體顏色。Adds function of customizing font color. 3108 -2013.11.16 Last.fm同步功能(請到主頁下載插件)。Last.fm scrobbler support. 3106 -2013.11.8 可回溯的隨機播放(學(xué)習(xí)Airplay 2)。Random playback can be traced back. 3103 -2013.10.12 優(yōu)化右鍵菜單。Optimizes popup menu. 3102 -2013.9.30 修改滾動條樣式,增加音頻緩沖選項。Modifies style of scroll bar, and adds option of audio buffer length. 3100 -2013.9.10 無邊框設(shè)計;迷你模式也可以不置頂(Hotkey:T)。Borderless designs. 3086 -2013.8.20 增加歌詞面板功能。Adds function of lyrics panel. 3082 -2013.8.08 增加在可視化界面顯示歌詞功能。Adds function of displaying lyrics on visual interface. 3080 -2013.8.01 新增設(shè)置字體功能,恢復(fù)簡單的自動關(guān)機功能。Adds function of setting font, and re-adds simple function of auto shutdown. 3060 -2013.6.26 修復(fù)在迷你模式停止響應(yīng)的Bug,去掉自動關(guān)機、歌詞調(diào)整功能。Fixes bug of stop responding in mini mode, and removes functions of auto shutdown and lyrics trimming. 3050 -2013.5.23 增加手勢功能。Adds gesture function. 3030 -2013.3.10 增加Aero磨砂玻璃效果[如需源碼請聯(lián)系我],XP/Win7/8無差別顯示,按Insert鍵開啟。Adds aero glass effect. 3020 -2013.2.23 增加簡易Tag編輯功能(選中并單擊即可,相當(dāng)于資源管理器中的重命名,按照[歌手 - 歌名][專輯]格式進行編輯)。Adds function of editing audio tags (select and click, edit with [artist - title][album] format). 3010 -2013.1.23 應(yīng)網(wǎng)友要求,加入讀取內(nèi)嵌CUE、歌詞及專輯封面功能。Adds function of reading CUE, LRC and album cover built in media. 3002 -2012.11.03 無按鈕設(shè)計;微調(diào)進度條尺寸。Buttonless design; modifies the size of the progress bar. 3001 -2012.10.15 重要改進,界面即按鈕:單擊 - 播放/暫停,按住 - 前進。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下使用微軟雅黑字體。Uses Microsoft YaHei font in Windows 8 CHS. 2981 -2012.8.20 視頻以插件提供(請到主頁下載),增加單曲循環(huán)功能。Adds function of repeat track. 2980 -2012.7.26 簡化代碼,去掉視頻和MIDI支持。Removes the video and MIDI support. 2970 -2012.7.20 增加媒體信息顯示功能。Adds function of displaying media info. 2960 -2012.6.28 增加專輯封面顯示功能(Hotkey:Ins)。Adds function of displaying album cover. 2956 -2012.6.01 再次簡化界面。Simplifies the interface again. 2952 -2012.4.28 增加音頻設(shè)備選擇功能:DS、ASIO、WASAPI。Adds function of selecting playback device. 2950 -2012.3.30 *增加滾輪調(diào)節(jié)音量功能(在托盤,中鍵靜音)和媒體鍵支持。Adds function of setting volume by mouse wheel (over systray, middle click to mute), and adds multimedia keys support. 2936 -2012.3.17 微調(diào)界面,修復(fù)物理刪除失效的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 緊急修復(fù)上一版出現(xiàn)的字體模糊BUG(Vista/Win7下),增加在任務(wù)欄顯/隱圖標(biāo)功能(Ctrl+T)。Fixes font vague bug for Vista/Win7, and adds showing/hiding icon on taskbar function. 2920 -2012.2.08 微調(diào)界面,優(yōu)化CPU占用(啟用背景圖片時)。Fine-tunes the interface, and optimizes CPU utilization (while enable background image). 2912 -2012.1.12 增加播放隊列功能。Adds playback queue function. 2910 -2011.12.25 改進迷你模式,增加查找功能。Improves mini mode, and adds find function. *注:此功能對殺毒軟件過敏,開啟方法:按F1進入選項,勾選全局快捷鍵。The feature is allergic to the anti-virus software.
上傳時間: 2016-06-10
上傳用戶: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
上傳時間: 2016-07-22
上傳用戶: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.
標(biāo)簽: 傳感器網(wǎng)絡(luò)
上傳時間: 2016-11-27
上傳用戶:xxmluo
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