ond_mono_hyst

天线方向图的波达方向，用于描述回波的方向图4，可以用于初学者学习使用(DOA antenna pattern, used to describe the echo pattern 4 can be used for beginners to learn to use)

说明：  相控阵天线六边形阵与矩形阵方向图，圆形喇叭天线方向图(Phased array antenna array and hexagonal array pattern of rectangular, circular horn antenna)

关于DSCDMA的仿真，首先对信号调制，然后扩频，接收端解扩解调。包含单用户和多用户下的的误码率曲线。(On the DSCDMA simulation, firstly modulate signals , and then spread spectrum, the receiver de-spread demodulation. Including single-user and multi-user under the BER curve.)

多输入多输／出(MIMO)雷达具有多个发射天线阵元和多个接收天线阵元，每个 阵元发射不同的信号且发射信号相互正交。(Multiple-input multiple input/output (MIMO) radar has multiple transmit antenna elements and multiple receive antenna elements, each element emission signal and transmit signals orthogonal to each other.)

二 维 时 域 有 限 差 分 法MATLAB 代 码(Two-dimensional finite difference time domain method MATLAB cod)

数字信号处理专业课程设计报告书，有关实验报告及相关的matlab程序。(Digital signal processing curriculum design report about lab reports and related matlab program.)

在一个移动通信系统中，发射信号是一个未调制的音频x(t)=cos(2πft)，其中f=f0+fi。设标称载波为f0=1GHz，并设fi =512Hz。假定移动用户在一个繁忙的高速公路上距离基站l公里处的地方，从开始从每小时60公里的速度开始，其速度（在0.01秒的时间间隔内测量）以1/2的概率随机的增加或减少1/10公里每小时。试仿真移动用户在这2s的时间间隔内所接收到的信号(及其频谱)。接收信号可以表示为： y(t)=a(t)Cos[2π(fo+f1)(t-△t)] 式中 △(t)=d(t)/c 且 a(t)=k/d2(t) 在上面的表达式中d(t)是在t时刻基站与移动用户的距离，c是光速，△(t)是传播延迟，而a(t)是信号在t时刻的衰减，并假设在这2s内a(t)是一个常数。利用复低通等效模型来进行仿真。(In a mobile communication system, the transmitted signal is an unmodulated audio x (t) = cos (2πft), where f = f0+ fi. Let nominal carrier of f0 = 1GHz, and set fi = 512Hz. Assume that mobile users on a busy motorway station l kilometers place, starting the beginning of 60 kilometers per hour, the speed (measured in 0.01 second interval) to increase the probability of a random 1/2 or reducing 1/10 km/h. Simulation test signal which the mobile subscriber in the 2s time intervals of the received (and its spectrum). The received signal can be expressed as: y (t) = a (t) Cos [2π (fo+ f1) (t- △ t)] Where △ (t) = d (t)/c And a (t) = k/d2 (t) In the above expression, d (t) at time t is a base station and a mobile user s distance, c is the speed of light, △ (t) is the propagation delay, and a (t) is the attenuation of the signal at time t, and assuming that 2s within a (t) is a constant. Using complex low-pass equivalent model for emulation.)

说明：  离散频谱的全相位校正法 离散频谱的全相位校正法.rar(Discrete spectrum of the full phase correction method. Rar)

analog modulation and coding technique

convolution with matlab