基于matlab的課程設(shè)計(jì),功能是實(shí)現(xiàn)AM信號(hào)的解調(diào),運(yùn)用了兩種方法實(shí)現(xiàn)。
標(biāo)簽: matlab
上傳時(shí)間: 2014-01-05
上傳用戶:zycidjl
轉(zhuǎn)載自Rulph Chassaing的源代碼,內(nèi)有函數(shù)Adaptc,AdaptIDFIR,adaptidFIRw,AdaptIDIIR, Adaptnoise,Adaptnoise_pcm,Adaptpredict, Adaptpredict_pcm,Aliasing,AM,DFT,Dotp4, dotp4clasm,Dotpintrinsic,Dotpipedfix, Dotpnp,Echo_control,Factclasm,Fastconvosim, FFTsinetable,FIR_pcm,FIRcirc_ext,loop_intr_pcm, Noise_gen,Twosumlasmfloat,sweep8000, SinegenDE,Scram16k,PLL.等近100個(gè)
標(biāo)簽: Adaptnoise_pcm adaptidFIRw AdaptIDFIR AdaptIDIIR
上傳時(shí)間: 2014-01-06
上傳用戶:李彥東
計(jì)算全息close all clc clear A=zeros(64) A(15:20,20:40)=1 A(15:50,20:25)=1 A(45:50,20:40)=1 A(30:34,20:35)=1 % ppp=exp(rand(64)*pi*2*i) A=A.*ppp % Author s email: zjliu2001@163.com figure imshow(abs(A),[]) Fa=fft2(fftshift(A)) Fs=fftshift(Fa) Am=abs(Fs) % amplitude Ph=angle(Fs) % phase s=11 % 這表示邊長(zhǎng)嗎? cgh=zeros(64*s) th=max(max(abs(Fs)))
標(biāo)簽: 20 close clear zeros
上傳時(shí)間: 2014-10-13
上傳用戶:wweqas
本系統(tǒng)以51單片機(jī)為控制核心,由正弦信號(hào)發(fā)生模塊、功率放大模塊、調(diào)幅(AM)、調(diào)頻(FM)模塊、數(shù)字鍵控(ASK,PSK)模塊以及測(cè)試信號(hào)發(fā)生模塊組成。采用數(shù)控的方法控制DDS芯片AD9850產(chǎn)生0Hz-30MHz正弦信號(hào),經(jīng)濾波、放大和功放模塊放大至6v并具有一定的驅(qū)動(dòng)能力。測(cè)試信號(hào)發(fā)生模塊產(chǎn)生的1kHz正弦信號(hào)經(jīng)過調(diào)幅(AM)模塊、調(diào)頻(FM)模塊,對(duì)高頻載波進(jìn)行調(diào)幅或調(diào)頻。二進(jìn)制基帶序列信號(hào)送入數(shù)字鍵控模塊,產(chǎn)生二進(jìn)制PSK或ASK信號(hào),同時(shí)對(duì)ASK信號(hào)進(jìn)行解調(diào),恢復(fù)出原始數(shù)字序列。 另外,本系統(tǒng)從簡(jiǎn)單、調(diào)整方便、功能完備為出發(fā)點(diǎn),基本實(shí)現(xiàn)了設(shè)計(jì)中的要求,波形輸出較穩(wěn)定,且精度較高。本設(shè)計(jì)還配備有LED顯示屏、鍵盤,提供了友好的人機(jī)交互界面。
上傳時(shí)間: 2017-01-04
上傳用戶:hewenzhi
用正交調(diào)制方法實(shí)現(xiàn)模擬調(diào)制,包括AM,DSB,SSB,LSB,FM,AM-FM等,實(shí)現(xiàn)后,顯示時(shí)域波形和功率譜密度
標(biāo)簽: 正交調(diào)制 模擬 調(diào)制
上傳時(shí)間: 2013-12-24
上傳用戶:lizhizheng88
DRM(Digital Radio Mondiale)系統(tǒng)采用OFDM調(diào)制方式, 引入了先進(jìn)的信源信道編碼和調(diào)制技術(shù),使得AM波段的音頻廣播質(zhì)量大大提高,在保持現(xiàn)有10kHz帶寬時(shí)接近了FM廣播的質(zhì)量[5]
標(biāo)簽: Mondiale Digital Radio OFDM
上傳時(shí)間: 2017-01-17
上傳用戶:xiaohuanhuan
A "code-what"? Unless you have spent some time working in the area of reverse engineering, chances are you have not heard of the term "codecave" before. If you have heard of it, you might not have read a clear definition of it or quite understand what it is or why it is useful. I have even asked seasoned assembly programmers about the term before and most of them had not heard of it. If it is new to you, do not worry, you are not the only one. It is a term that is scarcely used and is only useful in a reverse engineering context. Furthermore, is it "codecave" or "code cave"? I am not quite sure, but I will try my best to refer to it consistently as a "codecave". A space may sneak in there from time to time
標(biāo)簽: engineering code-what chances reverse
上傳時(shí)間: 2014-01-17
上傳用戶:hn891122
DS1302 是 DALLAS 公司推出的涓流充電時(shí)鐘芯片 內(nèi)含有一個(gè)實(shí)時(shí)時(shí)鐘/日歷和 31 字節(jié)靜態(tài) RAM 通過簡(jiǎn) 單的串行接口與單片機(jī)進(jìn)行通信 實(shí)時(shí)時(shí)鐘/日歷電路提供秒 分 時(shí) 日 日期 月 年的信息 每月的天 數(shù)和閏年的天數(shù)可自動(dòng)調(diào)整 時(shí)鐘操作可通過 AM/PM 指示決定采用 24 或 12 小時(shí)格式 DS1302 與單片機(jī)之 間能簡(jiǎn)單地采用同步串行的方式進(jìn)行通信 僅需用到三個(gè)口線 1 RES 復(fù)位 2 I/O 數(shù)據(jù)線 3 SCLK 串行時(shí)鐘 時(shí)鐘/RAM 的讀/寫數(shù)據(jù)以一個(gè)字節(jié)或多達(dá) 31 個(gè)字節(jié)的字符組方式通信 DS1302 工作時(shí)功耗很 低 保持?jǐn)?shù)據(jù)和時(shí)鐘信息時(shí)功率小于 1mW
標(biāo)簽: DALLAS 1302 RAM 實(shí)時(shí)時(shí)鐘
上傳時(shí)間: 2014-06-06
上傳用戶:weixiao99
Instead of finding the longest common subsequence, let us try to determine the length of the LCS. Then tracking back to find the LCS. Consider a1a2…am and b1b2…bn. Case 1: am=bn. The LCS must contain am, we have to find the LCS of a1a2…am-1 and b1b2…bn-1. Case 2: am≠bn. Wehave to find the LCS of a1a2…am-1 and b1b2…bn, and a1a2…am and b b b b1b2…bn-1 Let A = a1 a2 … am and B = b1 b2 … bn Let Li j denote the length of the longest i,g g common subsequence of a1 a2 … ai and b1 b2 … bj. Li,j = Li-1,j-1 + 1 if ai=bj max{ L L } a≠b i-1,j, i,j-1 if ai≠j L0,0 = L0,j = Li,0 = 0 for 1≤i≤m, 1≤j≤n.
標(biāo)簽: the subsequence determine Instead
上傳時(shí)間: 2013-12-17
上傳用戶:evil
用matlab7·0軟件對(duì)通信信號(hào)進(jìn)行調(diào)制simulink仿真,它包括am,pm,fm,ask,psk.rar
標(biāo)簽: simulink matlab7 軟件 調(diào)制
上傳時(shí)間: 2014-01-21
上傳用戶:youlongjian0
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