easy_suite

说明：  多重网格法求解过程中的松弛、限制和插值方法(multigrid iteration for relax, restrict and interpolate)

First, when the inter-user distance d is small, the SNR for D2D communication is high, and hence there are sufficient number of bits for high quality CSI exchange.

说明：  第一次作业_基于分类算法的雷达状态识别 对于本数据集中的雷达状态识别，数据降维前使用朴素贝叶斯、支持向量机、神经网络的分类算法对于识别的准确率无太大影响；数据降维后使用神经网络算法最优，支持向量机算法其次，朴素贝叶斯算法较差。此外，训练样本越多，分类准确率有小幅度提高。(First Operation Radar State Recognition Based on Classification Algorithms For radar state recognition in this data set, the classification algorithm of Naive Bayesian, Support Vector Machine and Neural Network before data dimension reduction has little effect on the accuracy of recognition; Neural Network algorithm is the best after data dimension reduction, Support Vector Machine algorithm is the second, Naive Bayesian algorithm is the worst. In addition, the more training samples, the smaller the classification accuracy.)

its a matlab code for ofdm with 16 qam

说明：  基于分水岭算法的图像分割对比，通过引入3种分水岭分割算法进行对比比较，对层次感较强的图像进行处理。(Based on watershed algorithm for image segmentation comparison, through the introduction of three kinds of watershed segmentation algorithm for contrast comparison, a strong sense of the level of image treatment.)

1）语音信号的采集 2）语音信号的频谱分析 3）设计高通、低通数字滤波器和画出其频率响应 4）用滤波器对信号进行滤波 5）比较滤波前后语音信号的波形及频谱 6）播放原始语音信号 7）实现快放、慢放功能 8）实现回音音效效果 9）实现变高音、低音效果 10）设计GUI系统界面 (1) voice signal acquisition 2) speech signal spectrum analysis 3) design high-pass, low pass digital filter and plot its frequency response 4) filtering the signal with a filter 5) to compare the before and after filtering the speech signal waveform and spectrum 6) Play the original voice signal 7) to achieve fast, slow function 8) to achieve an echo sound effect 9) to achieve change treble, bass 10) GUI system interface design)

lms基础算法，已经经过测试，可以通过。(LMS basic algorithm has been tested and passed.)

传统的高分辨波达方向（DOA）估计算法中，一般都假设信号位于远场，此时入射到阵列的信源波前为平面波前，空间信号的定位参数可由DOA来确定。然而，当信源处于阵列的Fresnel区域时，信号波前需用球面波来描述，每个信源的定位信息要用DOA和距离联合描述。因此，远场情况下的一些线性理论推导已不再成立，传统的远场算法的估计不再适用(In traditional high resolution direction of arrival (DOA) estimation algorithms, it is generally assumed that the signal is located in the far field, where the source wavefront incident to the array is plane wavefront, and the location parameters of the spatial signal can be determined by DOA. However, when the source is in the Fresnel region of the array, the wavefront of the signal needs to be described by spherical wave, and the location information of each source needs to be described by DOA and distance. Therefore, some linear theoretical deductions are no longer valid in the far-field case, and the estimation of the traditional far-field algorithm is no longer applicable.)

uwb无线电链路的性能分析时的程序,可以看看(Uwb radio link performance analysis program, you can see)

采用Newton—Raphson迭代法可以求解复系数一元三次方程的根，代码为Newton—Raphson迭代法的具体实现(The Newton-Raphson iteration method is used to solve the root of a cubic equation with complex coefficients. The code is the implementation of the Newton-Raphson iteration method.)