qpskmdm

数字下变频的matlab仿真源程序，自动生产图形(Digital Down Converter，matlab source)

语音信号处理综合运用了数字信号处理的理论知识，对信号进行计算及频谱 分析，设计滤波器，并对含噪信号进行滤波 (Speech signal processing of digital signal processing integrated use of theoretical knowledge, to calculate the signal and spectrum analysis, design filter, and filter the noisy signal)

用夫琅禾费衍射模型模拟液晶相控阵的远场光强分布(Fraunhofer diffraction model to simulate liquid crystal phased array far-field intensity distribution)

SVD based image compression

psk 模拟中调制与解调过程中的各种图像，对学习很重要的用处。(the psk analog modulation and demodulation process in a variety of image, very important to learn useful.)

本例用五点差分法求解一个二阶偏微分方程，其间用CG法处理，此实验可分别选取N=4，8，16，32(This example uses a five-point difference method for solving second order partial differential equations, during treatment with CG, were selected for this experiment can be N = 4,8,16,32)

Convolution Encoder and Decoder 1/2 , Viterbi algorithm

针对相干信号的DOA估计，对常规Music，空间平滑Music，双向空间平滑Music，传统LSESPRIT，TEOPLITZ-ESPRIT算法进行仿真并比较(DOA Estimation of the most classic super-resolution algorithm MUSIC and ESPRIT algorithm simulation of irrelevant signals estimates for the coherent signals DOA, conventional Music, spatial smoothing Music, bidirectional spatial smoothing Music, traditional LSESPRIT, TEOPLITZ-ESPRIT algorithm simulation and compare)

一种改进的变步长归一化算法的研究，对比归一化算法，有了比较好的改善(An improved variable step length normalization algorithm research, contrast normalization algorithm, a better improvement )

说明：  该程序实现QPSK的调制与解调，并计算误码率(The program realization QPSK modulation and demodulation, and calculate the error rate)