Description: PCM通信系统脉冲编码调制的信源编码，可以运行。模拟PCM的编码的波形！-PCM communication system pulse code modulation source coding, can run. Simulation of the PCM waveform coding! Platform: |
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Author:wstc |
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Description: PCM（脉冲编码调制，包括A律和U律压缩等功能的实现）-PCM (pulse code modulation, including legal and U A legal functions of the compression achieved) Platform: |
Size: 3072 |
Author:谢文武 |
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Description: 本程序可以对一个模拟信号进行数字化，使用的是PCM即脉冲编码调制，其结果是将样值转化为8位PCM编码。现今语音编码大多数采用这类编码方法-This procedure can be an analog signal to digital, using pulse code modulation or PCM, and the result is kind of value will be translated into eight PCM coding. Most of the current speech coding to adopt this type of coding method Platform: |
Size: 2048 |
Author:徐健 |
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Description: 通过PCM调制实现信源编码,通过抽样,调制通过MATLAB软件实现-Through the realization of PCM modulation source coding, through sampling, modulation through the MATLAB software Platform: |
Size: 1024 |
Author:dxq |
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Description: 脉冲编码调制（PCM）用于在数字传输媒体上传送模拟信号，在PCM中，首先对模拟信号以高于其带宽两倍的奈奎斯特率进行采样，然后对所得样本进行量化。采用不同量化级别生成的PCM编码会影响接收器重建模拟信号的质量。 -Pulse code modulation (PCM) for the media in the digital transmission of analog signal transmission in the PCM, the first analog signal to more than the Nyquist rate of twice the bandwidth sample, and then to quantify the samples. Using different quantization level generated PCM coding receiver will affect the quality of the reconstruction of analog signals. Platform: |
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Author:jack |
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Description: 摘 要
文章以空间监控系统为背景,深入研究了JPEG图像压缩标准的实现方法,并基于FPGA对其进行了实现和优化。文中给出了详细的实现方法和优化过程,测试表明达到了很好的效果。
简单介绍了有损静态图像压缩当前有两种比较流行的标准JPEG和JPEG2000。说明了用JPEG方法压缩的原因。
介绍JPEG基本原理：JPEG对灰度图像的压缩处理过程主要包括:图像分割,离散余弦变换(DCT),量化(Quantization),“Z”形排序(Zigzag Scan),差分脉冲编码调制(Differential Pulse Code Modulation,DPCM)对直流系数(DC),行程长度编码(Run-Length Encoding,RLE)对交流系数(AC),霍夫曼(Huffman)编码等。
JPEG标准的特点是离散余弦变换。
比较详细介绍压缩系统的构成和实现。实现提及步骤， JPEG压缩模块设计和编码模块实现细节。
-Abstract
Article in the space monitoring system for the background, in-depth study of the JPEG image compression standard implementation methods and carried out based on FPGA implementation and optimization. In this paper, a detailed method of implementation and optimization of the process, testing showed that to achieve good results.
Easy introduction of harmful static image compression has two kinds of comparisons that the current popular standard JPEG and JPEG2000. Illustrated by the reasons for JPEG compression method.
JPEG introduce the basic principles: JPEG compression of gray-scale image processing include: image segmentation, discrete cosine transform (DCT), quantization (Quantization), "Z"-shaped sort (Zigzag Scan), differential pulse code modulation (Differential Pulse Code Modulation, DPCM) on the DC coefficient (DC), Run Length Encoding (Run-Length Encoding, RLE) of the exchange coefficient (AC), Hoffman (Huffman) coding.
JPEG standard is characterized by discrete Platform: |
Size: 523264 |
Author:压子 |
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Description: ex9_1 脉冲信号调制
ex9_2 载波10MHz，带宽2MHz的线性调频信号及其频谱图
ex9_3 产生7位巴克码编码的二相码
ex9_4 产生7位巴克码和线性调频的混合调制信号
ex9_5 瑞利分布实现程序
ex9_6 瑞利分布＋杂波
ex9_7 相关对数正态分布杂波
ex9_8 相关weibull分布杂波
ex9_9 相干相关K分布杂波
ex9_10 线性调频信号的数字化正交解调
ex9_11 雷达脉冲压缩处理
ex9_12 二相编码信号的脉压处理
ex9_13 用FFT和FIR方法实现MTD处理
ex9_14 雷达的恒虚警处理（CFAR）
ex9_15 比较相参积累和非相参积累-ex9_1 pulse signal modulation
ex9_2 carrier 10MHz, bandwidth of 2MHz and the linear frequency modulation signal frequency spectrum
7 Barker ex9_3 produce the two-phase coding code
7 Barker ex9_4 generated code and linear FM modulation of the mixed signal
Rayleigh distribution ex9_5 implementation procedures
Rayleigh distribution ex9_6+ Clutter
lognormal distribution ex9_7 related clutter
weibull distribution ex9_8 related clutter
Related ex9_9 coherent K distributed clutter
LFM signal ex9_10 digital quadrature demodulation
radar pulse compression ex9_11 treatment
ex9_12 BPSK signal pulse pressure treatment
ex9_13 Ways to use FFT and FIR implementation deal with MTD
ex9_14 CFAR radar deal (CFAR)
Comparison ex9_15 coherent and noncoherent Platform: |
Size: 18432 |
Author:张满超 |
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Description: 差分脉冲编码调制（DPCM）的matlab模块仿真，实现抽样，量化，预测，编码并解码，欢迎下载使用，我自己编的-Differential pulse code modulation (DPCM) of matlab simulation module, the realization of the sample, quantification, prediction, coding and decoding, welcome to download, I own the Platform: |
Size: 7168 |
Author:张正锋 |
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Description: ，用MATLAB实现快跳频通信系统的仿真。主要应用了SIMULINK和COMMUNICATION BLOCKETS两个模块。整个设计包括了信源产生部分、发送部分、跳频调制部分、信道部分、接收部分和结果分析部分共六个模块，核心技术是伪随机序列的产生和频率合成器的设计，而关键技术是收发两端的伪随机码元的同步。伪随机码的产生用S－函数编程来开发自己的SIMULINK模块。同步的实现是收发两端采用相同的扩频脉冲触发。而且在设计中每个模块都采用了模块封装技术，从而简化了框图结构-Using MATLAB to achieve fast frequency-hopping communication system simulation. The main use of SIMULINK and COMMUNICATION BLOCKETS two modules. The whole design, including part of the generated source, sending part of some frequency-hopping modulation, channel of the receiving part and the results of analysis of part of a total of six modules, the core technology is the emergence of pseudo-random sequence and frequency synthesizer design, and the key technology is the transceivers at both ends of the pseudo-random synchronization symbol. Pseudo-random code generated by S-function programming to develop their own modules SIMULINK. Synchronization is used to send and receive ends of the same spread-spectrum pulse trigger. But also in the design of each module using the module packaging technology, which simplifies the structure of the diagram Platform: |
Size: 68608 |
Author:笑笑生 |
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Description: matlab程序，可实现脉冲编码调制，模拟信号的数字传输：抽样、量化、编码-matlab program to achieve pulse code modulation, digital transmission of analog signals: sampling, quantization, coding Platform: |
Size: 3072 |
Author:xjq |
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Description: 脉冲编码调制(PCM)实现
编程实现PCM技术的三个过程：采样、量化与编码。
采样：低通连续信号采样，以 x=sin(200*t) m=x./(200*t) m=m.*m 为例说明低通采样定理，绘出信号时、频图形；带通连续信号采样，以x=sin(20*t) m=x./t 为例说明带通采样定理，绘出信号时、频图形。
量化：均匀量化，以幅度 的正弦信号为例实现为64级电平的均匀量化；非均匀量化，输入A律PCM编码器的正弦信号 ，采样序列为 ，将其进行PCM编码，给出编码器的输出码组序列
编码：以上述信号为例，实现A律的13折线近似法及国际标准PCM对数A律量化编码。-Pulse code modulation (PCM) to achieve
PCM technology programming three processes: sampling, quantization and coding.
Sample: low-pass continuous signal sampling to x = sin (200* t) m = x./(200* t) m = m.* m an example low-pass sampling theorem, draw the signal, frequency graphics bandpass sampling continuous signals to x = sin (20* t) m = x./t an example bandpass sampling theorem, draw the signal, frequency graph.
Quantization: uniform quantization, in order to realize the magnitude of sinusoidal signal as an example for the 64 level uniform quantization non-uniform quantization, input A law PCM encoder sine signal, the sampling sequence, to be PCM encoded, the encoder is given The output code sequence
Code: A Case Study of the signal to achieve the 13 A line approximation law and international standards on the number of A law PCM coding quantization. Platform: |
Size: 2048 |
Author:马芳 |
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