Description: 利用MatLab软件，实现一种或几种循环码的编译码过程。再现编码和译码的步骤，绘制有关的性能曲线和波形图，并且能检错和纠错。-use MatLab software, to achieve one or a few recycling code encryption process. Reproduction coding and decoding steps, drawing on the performance curve and waveform map, and can, and error detection and correction. Platform: |
Size: 10593 |
Author:李家军 |
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Description: 生一个长为1000的二进制随机序列，“0”的概率为0.8，”1”的概率为0.2；B. 对上述数据进行归零AMI编码，脉冲宽度为符号宽度的50%，波形采样率为符号率的8倍，画出前20个符号对应的.. 开发工具：matlab-Health for a long 1,000 random binary sequence, "0" with a probability of 0.8, "a" with a probability of 0.2; B. above zero AMI data coding, and pulse width of symbols width of 50%, waveform sampling rate of the symbol rate eight times, to give the former 20 .. symbols corresponding development tools : Matlab Platform: |
Size: 2045 |
Author:蓝天 |
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Description: A. 产生一个长为1000的二进制随机序列，“0”的概率为0.8，”1”的概率为0.2；B. 对上述数据进行归零AMI编码，脉冲宽度为符号宽度的50%，波形采样率为符号率的8倍，画出前20个符号对应的波形（同时给出前20位信源序列）；C. 改用HDB3码，画出前20个符号对应的波形；D. 改用密勒码，画出前20个符号对应的波形；E. 分别对上述1000个符号的波形进行功率谱估计，画出功率谱；F. 改变信源“0”的概率，观察AMI码的功率谱变化情况；-have a length of 1,000 random binary sequence, "0" with a probability of 0.8, "a" with a probability of 0.2; B. above zero AMI data coding, and pulse width of symbols width of 50%, waveform sampling rate Symbol rate for the eight times that he painted before the 20 symbols corresponding waveforms (also given before 20 Source sequence); C. HDB3 code switch to depict the former 20 symbols corresponding waveform; D. Miller to switch codes to depict the former 20 symbols corresponding waveform; E. respectively above 1,000 symbols for the power spectrum waveform estimated to depict the power spectrum; F. Change source "0" the probability to observe AMI code changes in the power spectrum; Platform: |
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Author:郭慧勤 |
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Description: 生一个长为1000的二进制随机序列，“0”的概率为0.8，”1”的概率为0.2；B. 对上述数据进行归零AMI编码，脉冲宽度为符号宽度的50%，波形采样率为符号率的8倍，画出前20个符号对应的.. 开发工具：matlab-Health for a long 1,000 random binary sequence, "0" with a probability of 0.8, "a" with a probability of 0.2; B. above zero AMI data coding, and pulse width of symbols width of 50%, waveform sampling rate of the symbol rate eight times, to give the former 20 .. symbols corresponding development tools : Matlab Platform: |
Size: 2048 |
Author:蓝天 |
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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: |
Size: 21504 |
Author:wstc |
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Description: 利用MatLab软件，实现一种或几种循环码的编译码过程。再现编码和译码的步骤，绘制有关的性能曲线和波形图，并且能检错和纠错。-use MatLab software, to achieve one or a few recycling code encryption process. Reproduction coding and decoding steps, drawing on the performance curve and waveform map, and can, and error detection and correction. Platform: |
Size: 10240 |
Author:李家军 |
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Description: 实现匹配滤波器的matlab仿真，模拟了从信源波形编码、信道传输和接收译码的全过程。-Realize the matched filter matlab simulation, analog waveform from the source coding, channel transmission and reception of the whole process of decoding. Platform: |
Size: 299008 |
Author:王勇 |
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Description: 对语音编码技术的特点进行了分析与研究, 对波形编码、声码器和混合编码三种主要
的语音编码进行了比较, 并介绍了GSM 和CDMA 两种系统语音编码及部分常用语音编码芯
片, 指出了语音编码技术的发展趋势, 并根据矿井井下特点, 对矿井通信系统所采用的语音
编码技术进行了研究, 最后得出了几点有用的结论.-Of speech coding technology characteristics of the analysis and research on waveform coding, vocoder and mixed encoding three major speech coding are compared, and introduced the GSM and CDMA both types of systems commonly used part of speech coding and speech coding chip pointed out that the speech coding technology, development trends, and in accordance with the characteristics of the mine pit of the mine communication system used in speech coding technology for the study came to the conclusion that some useful conclusions. Platform: |
Size: 188416 |
Author:王萍 |
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Description: 使用VC与MATLAB混合编程实现了一路波形信号的FFT变换，简单修改后可以应用于信号处理程序中，由于使用了混合编程，大大减少了代码编写工作量-The use of VC and Matlab MATLAB waveform signals all the way FFT transform, simple modifications can be applied to signal processing procedures, the use of hybrid programming, greatly reducing the workload coding Platform: |
Size: 4166656 |
Author:何工 |
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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: |
Size: 1024 |
Author:刘骁明 |
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Description: 利用Matlab仿真脉冲编码调制（PCM）及A律、μ律PCM对声音进行压缩编解码过程。
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。波形编码器的作用是对采样后的信号样本进行量化和编码。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，2Aμ律和律编码都已被定为国际标准。-Matlab simulation using pulse code modulation (PCM) and the A law, μ law PCM codec for voice compression process.
Pulse Code Modulation (PCM, Pulse Code Modulation) is an analog voice signal into digital signal encoding. The role of the encoder waveform is sampled signal sample quantization and coding. From the mathematical point of view, the process is to quantify the magnitude of the value of a continuous set of infinite number of maps into a finite number of discrete set of amplitude values , encoding is to use 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 in, 2Aμ law and legal codes have been designated as international standards. Platform: |
Size: 954368 |
Author:tanii |
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Description: 这是关于LDPC信道编码模块设计的程序
打开源程序，先运行gengrate_h.m程序，陆续将码长设置为756bit，列重设置为3，行重设置为9。在Workspace中同时将H、A、B、C、D、E、Hget、Fget、g、Tget这是个变量选择另存为encode_in.mat 格式。再运行main_encode.m进行编码，主程序运行后，在当前目录下，自动生成编码结果文件“encode—out.mat”，这将作为下一次扩频调制仿真实验的的输入信号。最后分别查看Workspace中的变量s（编码前数据）和xyuan（编码后数据）的波形。
对比后，可以看出编码前的数据码片长度为504bit，编码后的码片数据长度为756bit。编码效率=编码前码片长度/编码后码片长度=2/3。-This is about the LDPC channel coding module design process
Open source, first run gengrate_h.m program, phasing out the code length is set to 756bit, column re-set to 3, line weight is set to 9. In the Workspace in the same time, H, A, B, C, D, E, Hget, Fget, g, Tget This is a variable select Save As encode_in.mat format. Then run main_encode.m encoding, the main program running in the current directory, the results of automatically generated code file "encode-out.mat", which will serve as the next simulation of the spread spectrum modulation input signal. Finally, the variables were View Workspace in s (before encoding data) and xyuan (encoded data) waveform.
After comparison, we can see the data before encoding chip length of 504bit, encoded data length of chip 756bit. Coded before coding efficiency = chip length/length of the encoded chip = 2/3. Platform: |
Size: 15360 |
Author:吴健 |
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Description: 自己设计的脉冲成形滤波器，采用matlab编码，并产生一个序列，输出经过成形后的波形-Pulse shaping filter design using matlab coding and generate a sequence, the output waveform after forming Platform: |
Size: 2048 |
Author:小雪 |
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Description: 代码附后
本设计结合 PCM 的抽样、量化、编码原理，利用 MATLAB 软件编程和绘图功能，完 成了对脉冲编码调制（PCM）系统的建模与仿真分析。课题中主要分为三部分对脉冲编码 调制（PCM）系统原理进行建模与仿真分析，分别为采样、量化和编码原理的建模仿真。 同时仿真分析了采样与欠采样的波形、均匀量化与 A 律 13 折线非均匀量化的量化性能及 其差异。通过对脉冲编码调制（PCM）系统原理的仿真分析，设计者对 PCM 原理及性能 有了更深刻的认识，并进一步掌握 MATLAB 软件的使用。 -This design combined with PCM sampling, quantization, coding theory, using MATLAB software programming and graphics capabilities, completed the pulse code modulation Modeling and Simulation (PCM) System. The issue is divided into three portions of pulse code modulation (PCM) system principle of modeling and simulation analysis, namely sampling, modeling and simulation quantization and coding principles. While the simulation waveform sampling and undersampling, uniform quantization and A-law 13 fold non-uniform performance and the quantized difference. By pulse code modulation (PCM) system principle of simulation analysis, the designer of the PCM principles and performance of a deeper understanding and further master the use of MATLAB software.
Platform: |
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Author:高山 |
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