Description: 对于CDMA2000 1X反向信道仿真，其中包括CRC，卷积，交织，扩频和调制的整个过程，模型和M文件。请查看文件夹中的README。-for CDMA2000 1X reverse channel simulation, including CRC, convolution, interleaving, Spread-spectrum modulation, and the whole process model and the M-file. Please see the folder README. Platform: |
Size: 84992 |
Author:过于问 |
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Description: 自己编写的BPSK调制与解调，内含matlab-figure-file、matlab-M-file和得出的jpg格式图形！-I have written BPSK modulation and demodulation, containing matlab-figure-file, matlab-M-file and come to the jpg format graphics! Platform: |
Size: 37888 |
Author:李里 |
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Description: 主要是实现调制识别，区分几种常用的数字调制信号，包括ASK,FSK,PSK,QAM。含有两个文件夹 其一为特征参数的仿真；其二为正确识别率的仿真。
文件夹key feature simulink中：
运行程序会得到各特征参数之间区分图 从图中可看到特征参数的有效性。
文件夹classification rate simulink中：
运行main.m文件 可以得到正确识别率 -Mainly to achieve modulation recognition, distinction of several commonly used digital modulation signals including ASK, FSK, PSK, QAM. One folder contains two characteristic parameters for the simulation second simulation for the correct recognition rate. Folder key feature simulink in: run the program will have the distinction between the characteristic parameters can be seen from the diagram Fig characteristic parameters of effectiveness. Folder in the classification rate simulink: Run main.m file to get the right recognition rate Platform: |
Size: 58368 |
Author:夏英杰 |
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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: matlab的OFDM 通信系统仿真源程序，m文件的，含循环前后缀，时域加窗等，适合刚接触OFDM的学习
采用qpsk调制和OFDM方式调制的对比-The OFDM communication system simulation matlab source, m file, with circulation before the suffix, such as time-domain windowing for OFDM new learner
Qpsk modulation and OFDM method using the contrast modulation Platform: |
Size: 91136 |
Author:张晋芳 |
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Description: 这是一个通信系统的仿真，是用SIMULINK的S-FUNCTION方式编写的，共有20个M文件，1个DOC文件，本系统的仿真设计到编码、调制、IFFT、上下变频、高斯信道建模、FFT、PAPR抑制、各种同步、解调和解码等模块，每个模块都用详细的代码和注释，并通过了系统性能的仿真验证了系统设计的可靠性，可以直接拿来仿真整个系统，也可来学习各个部分的设计。-This is a communication system simulation, is the S-FUNCTION SIMULINK approach to the preparation, a total of 20 M file, a DOC file, the system simulation design to coding, modulation, IFFT, and down conversion, Gaussian channel model , FFT, PAPR suppression, various synchronization, demodulation and decoding modules, each module with a detailed code and comments, and system performance through simulation and verification of the reliability of system design, simulation of the entire system can be directly used, also to learn the various parts of the design.
Platform: |
Size: 38912 |
Author:masong |
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Description: 这是用SIMULINK的S-FUNCTION方式编写的系统仿真代码，系统是基于4G网络的核心技术空时分组编码的MIMO-OFDM通信系统的，涉及到空间分集、时间分集和频率分集的有机结合，包括QPSK调制解调、IFFT调制、控制编解码、基于训练符号的信道估计等通信模块。包括main_STBC_MIMO_OFDM和training_symbol两个M文件和一个DOC文件，对各部分的都有详细的代码和注释。-It is used SIMULINK the S-FUNCTION approach to the preparation of the system simulation code, the system is based on the 4G network s core technology space-time block coded MIMO-OFDM communication system, involving spatial diversity, time diversity and frequency diversity of the organic combination, including QPSK modulation and demodulation, IFFT modulation, control of encoding and decoding, symbol-based channel estimation training and other communication module. Including main_STBC_MIMO_OFDM and training_symbol two M file and a DOC file, have detailed the various parts of the code and comments.
Platform: |
Size: 13312 |
Author:masong |
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Description: 这是IS-95前向链路系统的MATLAB仿真程序及注释。包括用S-FUNCTION方式编写的M文件。共有10个M文件和一个MATLAB程序DOC文件，包括扩频调制、匹配滤波、RAKE接受等相关通信模块的代码，仿真环境为加性高斯白噪声信道。-This is the IS-95 forward link system, MATLAB simulation program and comments. Including the use of S-FUNCTION approach to the preparation of the M file. A total of 10 M DOC file and a MATLAB program files, including spread spectrum modulation, matched filter, RAKE receiving the code and other related communication module, the simulation environment for the additive white Gaussian noise channel.
Platform: |
Size: 22528 |
Author:masong |
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Description: 本设计主要对4PSK调制方式的信号，利用MATLAB的m文件进行最佳接收机的设计与仿真。对输入的叠加噪声的4PSK调制信号进行接收，利用相关解调器来实现信号解调，及最大似然准则来实现检测器。在相关解调器中，接收信号分别与基函数 和 相乘再积分。在检测器中，利用相位来判断输出，从而最终得到接收的数据。采用随机二进制数通过4PSK调制后叠加高斯白噪声再对设计的接收机进行测试，从测试的结果可看出，在信噪比大于-8dB时，误码率为0，说明该接收机较好的实现了抗噪声性能。-The design of the main 4PSK modulation mode of the signal, the use of MATLAB m file for the best receiver design and simulation. The 4PSK modulated signal of the input superimposed noise is received, and the demodulator is realized by the relevant demodulator, and the maximum likelihood criterion is used to realize the detector. In the associated demodulator, the received signal is multiplied by the basis function and multiplied by the basis function. In the detector, the output is judged by the phase, and finally the received data is obtained. Using the random binary number through 4PSK modulation after the superposition of white noise and then the design of the receiver to test the test results can be seen in the signal to noise ratio greater than-8dB, the bit error rate is 0, indicating that the receiver is better The realization of the anti-noise performance. Platform: |
Size: 21504 |
Author:kangyuxiang |
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Description: 利用MATLAB集成环境下的M文件，编写程序来实现MSK的调制解调，并绘制出解调前后的时域和频域波形及叠加噪声时解调前后的时频波形，根据运行结果和波形来分析该解调过程的正确性及信道对信号传输的影响。通过这次课程设计进一步加深了我对最小二进制相移键控（MSK）调制解调性能的理解与掌握，同时将课堂上学到的理论知识用于实践。增强了我在模拟仿真方面的能力，为以后系统开发和通信系统仿真打下了良好的基础。(The use of MATLAB in the integrated environment of M file, write a program to achieve MSK modulation and demodulation, and draw out the time-frequency waveform before and after demodulation in time domain and frequency domain waveform and the superimposed noise before and after demodulation, to analyze the correct and the channel of the demodulation process of signal transmission according to the operation results and waveform. Through this course design, I further deepen the understanding and mastery of the minimum binary phase shift keying (MSK) modulation and demodulation performance, at the same time, the theoretical knowledge learned in the classroom is used in practice. It enhances my ability in analog simulation, and lays a good foundation for future system development and communication system simulation.) Platform: |
Size: 595968 |
Author:史宾
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Search - modulation simulation MATLAB M-file