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(1)设计一个数字低通滤波器．设计指标如下： 通带内幅度衰减人大于1dB 阻带内幅度衰减大于15dB (2)编制计算设计的数字滤波器幅度特性与相位特性程序，并进行实验验证； (3)编制实现该数字滤波器程序并且模拟实现数字滤波 ①分别让满足所设计滤波器的通带、过滤带、阻带频率特性的正弦波通过滤波器，验证滤波器性能。 ②改变正弦抽样时间，验证数字低通滤波器的模拟截止频率是抽样时间的函数。((1) Design a digital low-pass filter. Design specifications are as follows: pass-band attenuation range of people within a range greater than 1dB stopband attenuation greater than 15dB (2) the preparation of calculation and design of digital filter amplitude characteristics and phase characteristics of processes and experimental verification (3) the preparation of implementation of the digital filter program and simulate digital filtering ① were designed to meet the pass-band filter, filter belt, stop-band frequency characteristics of the sine wave through the filter, verify the filter performance. ② change the sine sampling time, verify that the number of analog low-pass filter cutoff frequency is the sampling function of time.)

瑞利衰落信道，是一种无线电信号传播环境的统计模型。这种模型假设信号通过无线信道之后，其信号幅度是随机的，即“衰落”，并且其包络服从瑞利分布。这一信道模型能够描述由电离层和对流层反射的短波信道，以及建筑物密集的城市环境。(Rayleigh fading channels, the statistical model of a radio signal propagation environment. This model assumes that after the signal through the radio channel, the signal amplitude is random, ie, the " fading" and the envelope of the Rayleigh distribution. This channel model is able to describe the HF channel reflected by the ionosphere and troposphere, as well as building a dense urban environment.)

本代码能够正确实现H264的编码解码过程(This code can be correctly implemented H264 codec process)

动态3D心形图形的MATLAB源代码 有动态图形和MATLAB源代码(MATLAB source code of Dynamic heart shaped)

AF，DF，CC,三种基本协作方式仿真程序(Simulation of three basic collaborative approach)

How to convert GPS readings in Degree, Minutes Seconds to Decimals

说明：  搭建 BPSK+编码+交织仿真通信链路，仿真分析在不同信道条件下的不同译 码算法的误比特率性能。基于 matlab，搭建 BPSK+卷积编码+交织通信收发链路， 仿真参数如下： 1) 信源比特速率： 100 b R kbps = 2) 卷积编码：码率为 1/2，生成多项式为（561,753） 3) 译码方式：维特比译码（硬判决译码、软判决译码（8 比特量化）） 4) 交织：行列交织，交织器深度为 100bit，宽度为 10； 5) 仿真点数：106 1. 在 AWGN 信道下，仿真并绘出该系统在硬判决和软判决（3bit 量化）两 种译码方式下的信源误比特率曲线，并进行分析。 2. 设定某种交织器结构，在单径瑞利衰落信道（ 100 d f Hz = ）下，采用理 想信道估计，仿真并绘出该系统在有无交织、不同译码方式（硬判决和 软判决）时，在不同 0 b EN下的信源误比特率曲线，并进行分析。 3. 改变交织器结构，选择三种不同的交织深度（自行决定），在单径瑞利衰 落信道（ 100 d f Hz = ）下，仿真并绘出该系统在不同交织长度时，在不 同 0 b EN下的信源误比特率曲线，并进行分析。(Build a BPSK + encoding + interleaving simulation communication link, and analyze the different translations under different channel conditions The bit error rate performance of the code algorithm. Based on MATLAB, BPSK + convolutional coding + interleaved communication transceiver link is built, The simulation parameters are as follows: 1) source bit rate: 100 b r Kbps = 2))

自己做的一个双馈电机的矢量控制，可以跑，PI参数和电机系数可以自行修改修改，波形会更好。(This is a DFIM FOC simulation program based on MATLAB simulink.It contains the SVPWM program.)

说明：  GPS伪距动态单点定位的计算公式,分析单点定位误差与几何强度因子GDOP之间的关系,并研究了当观测卫星数仅为必要的4颗时定位精度的降低情况,画出了GDOP与平面定位精度之间的等值线关系图,并研究了GDOP与定位精度之间的相关性。(the kinematic positioning formula using GPS pesudorange is given. The relationshipbetween error of single point positioning and geometry dilution of positioning(GDOP) is analysed. The worse situation in which only 4 pesudoranges are used in positioning is introduced. The relation contour between plane error of positioning and GDOP is given. Also studied is the correlation between positioning accuracy and GDOP. )

5G主同步信号m序列根据公式matlab生成(5G Pss m matlab generater)