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Description: LDPC码既低密度奇偶校验码（Low Density Parity Check Code，LDPC），它由Robert G.Gallager博士于1963年提出的一类具有稀疏校验矩阵的线性分组码，不仅有逼近Shannon限的良好性能，而且译码复杂度较低, 结构灵活，是近年信道编码领域的研究热点，目前已广泛应用于深空通信、光纤通信、卫星数字视频和音频广播等领域。LDPC码已成为第四代通信系统(4G)
-LDPC codes BER simulation under AWGN channel. MacKay-Neal based LDPC matrix. Message encoding uses sparse LU decomposition. There are 4 choices of decoder: hard-decision/bit-flip decoder, probability-domain SPA decoder, log-domain SPA decoder, and simplified log-domain SPA decoder.
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Size: 8192 |
Author: 天天 |
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Description: turbo coding with
and map implementation and constitutional coding& BER in other modulation with description
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Size: 62464 |
Author: sheida |
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Description: VC++编码实现的（7，4）海明码，程序运行正确，用VC实验得到在硬软判决下的误码率。再用Matlab讲得到的数据进行绘图。-The realization of (7,4)hamming coding under the VC++.The program runs corectly,resulting the BER under several types.Finally, use the matlab to map with datas.
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Size: 6144 |
Author: 李小 |
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Description: 基于16QAM调制解调的OFDM信道估计，计算了不同信噪比下的误码性能曲线，并画出了图。-Comb based on the OFDM pilot channel estimation, calculation of the BER performance under different signal to noise ratio curve, and draw the map.
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Size: 1024 |
Author: tang |
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Description: 课程设计需要运用MATLAB编程实现2ASK,2FSK,2PSK，2DPSK调制解调过程，并且输出其调制后的波形，画出频谱、功率谱密度图，并比较各种调制的误码率情况，讨论其调制效果。-Curriculum design requires the use of MATLAB programming 2ASK 2FSK, 2PSK 2DPSK modulation demodulation process and output modulated waveform, draw the spectrum, power spectrum density map and compare various modulation BER discuss its modulation effect.
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Size: 206848 |
Author: zhujun |
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Description: 文件是QAM调制的matlab程序。包含星座图以及误码率/信噪比图。-File is QAM modulation matlab program. Contains the constellation diagram and BER/SNR map.
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Size: 2048 |
Author: |
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Description: 在MATLAB中求图像纹理特征，CvQYOVl参数对于初学者具有参考意义，单径或多径瑞利衰落信道仿真，最大似然（ML）准则和最大后验概率（MAP）准则，wcfydnB条件一种流形学习算法（很好用），采用波束成形技术的BER计算。- In the MATLAB image texture feature, CvQYOVl parameter For beginners with a reference value, Single path or multipath Rayleigh fading channel simulation, Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, wcfydnB condition A fluid manifold learning algorithm (good use), By applying the beam forming technology of BE.
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Size: 7168 |
Author: qxyjqg |
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Description: 通信系统设计，数字带通传输系统仿真Matlab代码
1. 比较BPSK与QPSK两种调制方式的误码率和误比特率性能（注意QPSK的误码率不同于误比特率），横坐标为SNR，并与理论曲线比较，分析解释仿真图。
2. 要求使用Matlab/C语言/Matlab-simulink中的任一种工具实现。
3. 代码中每个模块都要有详细注释说明。
-Communications systems design, digital bandpass transmission system simulation Matlab code
1. Comparison of BER QPSK and BPSK modulation methods and bit error rate performance (note QPSK error rate is different bit error rate), the horizontal axis is SNR, and compared with the theoretical curve, analysis and interpretation of simulation map.
2. requires the use of Matlab/C language/Matlab-simulink any one tool to achieve.
3. The code of each module must have a detailed explanatory notes.
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Size: 4096 |
Author: wang |
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Description: 采用波束成形技术的BER计算，Relief计算分类权重，仿真图是速度、距离、幅度三维图像，最大似然（ML）准则和最大后验概率（MAP）准则，matlab小波分析程序，具有丰富的参数选项。- By applying the beam forming technology of BER Relief computing classification weight, FIG simulation speed, distance, amplitude three-dimensional image, Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, matlab wavelet analysis program, It has a wealth of parameter options.
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Size: 7168 |
Author: wbxrun |
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Description: 不规则LDPC码的编码、译码matlab例程，并包含误码性能曲线的绘制。-the matlab program including LDPC encoding,decoding, and the approach to plotting the BER map.
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Size: 20480 |
Author: chenxiaowen |
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Description: Relief计算分类权重，最大似然（ML）准则和最大后验概率（MAP）准则，采用波束成形技术的BER计算，有借鉴意义哦，matlab程序运行时导入数据文件作为输入参数，用于时频分析算法，毕业设计有用，随机调制信号下的模拟ppm。- Relief computing classification weight, Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, By applying the beam forming technology of BER There are reference Oh, Import data files as input parameters matlab program is running, For time-frequency analysis algorithm, Graduation useful Random ppm modulated analog signal unde.
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Size: 8192 |
Author: ypbmbevc |
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Description: 包含位置式PID算法、积分分离式PID，在matlab R2009b调试通过，调试通过可以使用，对于初学matlab的同学会有帮助，给出接收信号眼图及系统仿真误码率，最大似然（ML）准则和最大后验概率（MAP）准则，包括 MUSIC算法，ESPRIT算法 ROOT-MUSIC算法。- It contains positional PID algorithm, integral separate PID, In matlab R2009b debugging through, Debugging can be used, Matlab for beginner students will help, The received signal is given eye and BER simulation systems, Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, Including the MUSIC algorithm, ESPRIT algorithm ROOT-MUSIC algorithm.
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Size: 6144 |
Author: djtmfvgk |
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Description: 利用MATLAB软件对OFDM系统做出仿真。仿真中采用QPSK调制技术，并加入高斯白噪声，最终得到QPSK星座映射图以及BER曲线图。由仿真结果可以看出，OFDM在高斯信道具有良好的抗噪声性能，误码率较低。(MATLAB software is used to simulate the OFDM system. In the simulation, QPSK modulation technology is used, and Gauss white noise is added, and the map of the QPSK constellation and the BER curve are finally obtained. It can be seen from the simulation results that OFDM has good anti noise performance and low error rate in Gauss channel.)
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Size: 1024 |
Author: l99500
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