Description: turbo码系统的仿真，包括编码、交织、不同译码、穿孔等各个部分的程序。仿真结果在图中表现。译码算法为log-map。-turbo code system simulation, including encoding, interleaving, different decoder, such as perforation of part of the process. Simulation results are shown in Fig. Decoding algorithm for log-map. Platform: |
Size: 29444 |
Author:赵欣 |
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Description: turbo码系统的仿真，包括编码、交织、不同译码、穿孔等各个部分的程序。仿真结果在图中表现。译码算法为log-map。-turbo code system simulation, including encoding, interleaving, different decoder, such as perforation of part of the process. Simulation results are shown in Fig. Decoding algorithm for log-map. Platform: |
Size: 28672 |
Author:赵欣 |
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Description: 关于LDPC编译码的程序，希望大家喜欢。
其中有具体的编码，解码，调制等模块。-on LDPC encryption procedures, hope you like them. Which specific encoding, decoding, modulation and other modules. Platform: |
Size: 34816 |
Author:bill |
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Description: 仿真程序：
1． OSI参考模型的信息流动过程：设计一个仿真程序，说明OSI参考模型的信息流
动过程以及每层的作用。
2． 调制和解调：设计一个演示程序，说明调制解调器的调制和解调的过程
3． 信号的编码：设计一个仿真程序，演示信号的直接编码、曼彻斯特编码、差分曼
彻斯特编码；
4． 滑动窗口协议：设计一个仿真程序，说明滑动窗口协议的工作过程
5． 设计一个全双工停等协议
-simulation program : 1. OSI reference model of information flow : design a simulation program, Note OSI Reference Model processes and information flows for each role. 2. Modulation and demodulation : design a demonstration program that the modem modulation and demodulation process 3. The signal coding : a simulation program designed to demonstrate the direct signal coding, Manchester encoding, the difference Manchester encoding; 4. Sliding Window Protocol : design a simulation program that the sliding window protocols process 5. The design of a full-duplex shutdown agreement Platform: |
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Author:小龙 |
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Description: 本文件中包含了很多在通信基本原理中常用的源程序，像各种调制方式，交织方式，编码方式都有很详尽的源程序。非常经典！-this document contains many of the basic principles of communication common source, like various modulation, intertwined, encoding great detail of the source. Very classic! Platform: |
Size: 527360 |
Author:wangziyu |
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Description: 基于自适应增量调制和线性增量调制的原理，用matlab实现LDM和ADM，并比较两者之间的优缺点-Based on adaptive delta modulation and linear delta modulation principle, using matlab to achieve LDM and ADM, and compare the advantages and disadvantages between the two Platform: |
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Author:张建喜 |
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Description: gmsk的源代码，包括了调制，以及有关Vertib编码的代码-GMSK source code, including the modulation, as well as the encoding code Vertib Platform: |
Size: 20480 |
Author:飞天 |
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Description: 用MATLAB实现PCM（脉冲调制）的编码，其中调制采用的是mu律算法模型，量化间隔可以自行选择-Using MATLAB realization of PCM (pulse modulation) encoding, in which modulation is used mu law algorithm model to quantify the interval may choose Platform: |
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Author:lijie |
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Description: 本课程设计完成了基带线路码产生电路的设计，数字基带信号的传输是数字通信系统的重要组成部分之一。在数字通信中，有些场合可不经过载波调制和解调过程，而对基带信号进行直接传输。为使基带信号能适合在基带信道中传输，通常要经过基带信号变换，这种变换过程事实上就是编码过程。本些课题实现了这样的编码过程。-This course is designed to use VHDL hardware description language completed the base-band circuits have a code of the circuit design. Digital base-band signal transmission of digital communications systems is an important part of one.In the signal before transmission to go through the code to deal with. In digital communications, there are some occasions, not through the process of modulation and demodulation, and base-band signal for direct transmission. In order to be able to base-band signal for the base-band transmission channels, usually after a base-band signal transformation, the transformation process is in fact the process of encoding. Platform: |
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Author:li |
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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: |
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Author:压子 |
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Description: PCM编码系统的设计【课程设计】PCM编码（又叫脉冲编码调制）：数字通信的编码方式之一。主要过程是将话音、图像等模拟信号每隔一定时间进行取样，使其离散化，同时将抽样值按分层单位四舍五人取整量化，同时将抽样值按一组二进制码来表示抽样脉冲的幅值。-PCM coding system design curriculum design】 【PCM encoding (also known as pulse code modulation): digital communications, one of the encoding. The main process is to voice, image and other analog signal at a certain time for sampling, to discretization, sampling at the same time, the value of homes by the hierarchical units in five four rounded to quantify the sampling values at the same time, a group of binary code to indicate the sample pulse amplitude. Platform: |
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Author:zhen |
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Description: 基于matlab开发的GSM物理层仿真程序，包括信道编解码、GSMK调制解调、viterbi均衡等整套的L1算法，并有详细的文档说明。-Matlab based on the development of GSM physical layer simulation program, including channel encoding and decoding, GSMK modulation and demodulation, viterbi algorithm for a balanced and so the whole set of L1, and detailed documentation. Platform: |
Size: 1657856 |
Author:李亚洲 |
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Description: 1100011001的非归零码、曼彻斯特编码、差分曼彻斯特编码、调幅（ASK）、调频（FSK）和调相（PSK）的编码波形示意图-1100011001 of the NRZ, Manchester encoding, differential Manchester encoding, AM (ASK), frequency modulation (FSK) and phase modulation (PSK) waveform diagram of the coding Platform: |
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Author:刘骁明 |
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Description: 这组代码模拟了整个信号的编码，调制，解调，译码在无线通信，其中包括A-law扩展，PCM和的2PSK调制解调的技术过程。-This collection of codes simulates the whole signal encoding, modulation, demodulation, decoding process in wireless communication, which involves the techniques of A law companding, PCM, and 2PSK modulation and demodulation. Platform: |
Size: 2048 |
Author:songruojia |
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Description: 脉冲编码调制（PCM，Pulse Code Modulation）是一种将模拟语音信号转换成数字信号的编码方式，从数学上来看，量化过程就是把一个连续幅度值的无限数集合映射成一个离散幅度值的有限数集合，编码就是用一组二进制数来表示这些映射后的有限数。
国际标准化的PCM采用折叠二进制码，符合长途电话质量。根据量化方法的不同，PCM 可分为均匀量化PCM 和对数PCM 两大类，对数PCM中，A律和μ律编码都已被定为国际标准。
本程序实现了A律、μ律以及均匀量化三种PCM，并带有GUI界面，方便使用。可以计算编码后的码率、运行时间以及最小均方误差。-Pulse Code Modulation (PCM, Pulse Code Modulation) is an analog voice signal into digital signal encoding, from the mathematical point of view, the process is to quantify the magnitude of the value of an infinite number of continuous mapping into a discrete set of the limited range of values number set, code is a set of binary digits, said after a limited number of these maps.
By folding the International Standardization of PCM binary code, in line with long-distance telephone quality. According to the different quantitative methods, PCM can be divided into uniform quantization PCM PCM and the number of two categories, on the number of PCM, A law and μ-law code have been designated as international standards.
A law implemented in this program, μ law and the uniform quantization of three PCM, with a GUI interface, easy to use. Encoded bit rate can be calculated, running time and minimum mean square error.
Platform: |
Size: 904192 |
Author:Sariel |
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