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Description: （一）基本任务：单频正弦波模拟信号的简单数字化。即对一个单频正弦波模拟信号进行抽样、均匀量化、PCM二进制自然编码。
1、主要步骤和要求：
（1）单频正弦波模拟信号的抽样实现。要求输入信号的幅度A、频率F和相位P可变；要求仿真时间从0到2/F，抽样频率为Fs=20F；要求给出抽样信号samp的波形图。
（2）单频正弦波模拟信号均匀量化的实现。要求对抽样信号sampl归一化后再进行均匀量化；要求量化电平数D可变；要求输出信号为平顶正弦波；要求给出量化输出信号quant的波形图，并与抽样信号samp画在同一图形窗口中进行波形比较。
（3）单频正弦波模拟信号PCM二进制自然编码的实现。要求按量化序号给出PCM二进制自然编码；要求给出编码后的数字序列pcm。
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Size: 1024 |
Author: Joseph |
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Description: 数字基带传输系统的MATLAB仿真实现
function [sampl,re_sampl]=system_1(A,F,P,D,snr,m,N)
输入变量A ,F,P分别为输入信号的幅度、频率和相位，D为量化电平数，snr
为信道信噪比，N为D/A转换时的内插点数；输出变量sampl为抽样后的输入
信号，re_sampl为恢复出的输入信号。
数字基带传输系统的MATLAB仿真实现
[sampl,quant,pcm]=a_d_1(A,F,P,D)
[changed_ami]=signal_encod_1(pcm)
[ami_after_channel]=channel_1(changed_ami,snr)
[adjudged_ami]=adjudg_1(ami_after_channel,m)
re_pcm=signal_decod_1(adjudged_ami)
[re_voltag,re_sampl,re_sampl1]=d_a_1(re_pcm,sampl,D,N)-Digital baseband transmission system implementation MATLAB simulation function [sampl, re_sampl] = system_1 (A, F, P, D, snr, m, N) input variables A, F, P, respectively, for the input signal amplitude, frequency and phase , D to quantify the number of electric-ping, snr for the channel signal to noise ratio, N to D/A converter when the interpolation points output variables for the sample after Sampl input signal, re_sampl for the restoration of the input signal. Digital baseband transmission system simulation MATLAB implementation [sampl, quant, pcm] = a_d_1 (A, F, P, D) [changed_ami] = signal_encod_1 (pcm) [ami_after_channel] = channel_1 (changed_ami, snr) [adjudged_ami] = adjudg_1 (ami_after_channel, m) re_pcm = signal_decod_1 (adjudged_ami) [re_voltag, re_sampl, re_sampl1] = d_a_1 (re_pcm, sampl, D, N)
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Size: 4096 |
Author: Joseph |
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Description: PCM 脉冲编码调制的C源代码，包括调制和解调,在5509a DSP的CCS环境下通过，对做PCM调制和DSP编程都有帮助-PCM pulse code modulation of the C source code, including the modulation and demodulation, 5509a DSP in the CCS environment through, for to do PCM modulation and DSP programming help
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Size: 168960 |
Author: 马凯 |
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Description: A/D convertor, PCM, quantization
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Size: 2489344 |
Author: PSH |
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Description: 使用acm做的gsm-pcm格式转换库程序，在VC6下编译，生成waveConvert.d-Acm done using the gsm-pcm format conversion library procedures under VC6 compiler to generate waveConvert.dll
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Size: 11255808 |
Author: wgh |
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Description: pcm模拟音频信号经模数转换（A/D变换）直接形成的二进制序列，该文件没有附加的文件头和文件结束标志。Windows的Convert工具可以把PCM音频格式的文件转换成
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Size: 2048 |
Author: flynecnt |
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Description: Hello everybody,
I d like to share some of my routines which are based upon Neutone s ideas.
We use this code in our welding machines successfully for more than 2 years now.
The protocol is built like this: Firstly the MASTER scans the bus to find out what SLAVE(S) is/are present in the system. Its behaviour (commands issued to particular SLAVES) depends on the results of this scanning process. The main loops in all members must be designed so that they take 1 msec because all bus timings (end of frame recognition) rely on that. The advantage is that no other timers are needed for the communication.
The code will run on PIC16F877@20MHz or PIC18F452 and it s been compiled with PCM or PCH 3.190
Well, let s start with MASTER main part
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Size: 22528 |
Author: ali |
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Description: PPM编码
PPM的编解码方式一般是使用积分电路来实现的，而PCM编解码则是用模/数（A/D）和数/模（D/A）转技术实现的。 -PPM encoding PPM codec integral circuit, the PCM codec with analog/digital (A/D) and digital/analog (D/A) transfer technology.
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Size: 79872 |
Author: 陳秋 |
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Description: PCM文件：模拟音频信号经模数转换（A/D变换）直接形成的二进制序列，该文件没有附加的文件头和文件结束标志。Windows的Convert工具可以把PCM音频格式的文件转换成Microsoft的WAV格式的文件。-PCM files: analog audio signal by the analog to digital conversion (A/D transformation) direct the formation of binary sequences, it did not attach the file header and file marks the end. Convert tool for Windows PCM audio file formats can be converted to Microsoft' s WAV format files.
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Size: 413696 |
Author: 吴迪 |
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Description: VC++6.0下，实现的两个PCM格式的文件混音的D-The VC++6.0 achieve the two PCM format file mixing DLL
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Size: 8802304 |
Author: 吴新 |
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Description: pcm文件格式简要介绍 模拟音频信号经模数转换（A/D变换）直接形成的二进制序列-pcm file format describe
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Size: 41984 |
Author: jmplay |
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Description: Driver for Winsystems PC-104 based PCM-D/A-12 8-channel AO board.
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Size: 4096 |
Author: jhjulu |
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Description: TP3067是一款PCM编解码专用芯片，可以通过它来进行A/D和D/A转换。-TP3067 is a PCM codec dedicated chip, and through it to the A/D and D/A converter.
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Size: 229376 |
Author: 齐磊 |
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Description: Driver for Winsystems PC-104 based PCM-D/A-12 8-channel AO board.
Platform: |
Size: 4096 |
Author: yungaoke |
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Description: Driver for Winsystems PC-104 based PCM-D A-12 8-channel AO board.
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Size: 2048 |
Author: neireikie |
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Description: 产生一正态分布序列 经过pcm编码、PCM解码、计算量化信噪比、设置信道误码率
-Generating a normal sequence after pcm encoding, PCM decoding, computing quantization noise ratio, set the channel error rate
x = randn (1,1000) generating a normal sequence
xf = fft (x, 256) 1024 data points, that is a signal sampling data to process 1024 points
d = x
subplot (2,1,1) normal draw sequence time domain and frequency domain plots
plot (x)
title ( length of 1000 standard normally distributed random time-domain waveform signal )
subplot (2,1,2)
plot (abs (xf))
xlabel ( Frequency/Hz )
ylabel ( amplitude )
......
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Size: 2048 |
Author: 高山 |
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