同步FIFO的Verilog代码

。给出了时域滤波的基本原理以及通常采用的 IIR 椭圆地物杂波滤波器的设计方法。重点研究了回归滤波器这一时域滤波算 法。从正交多项式的拟合出发，给出了回归滤波器抑制地物杂波的基本原理及 其滤波实现过程。通过对回归滤波器的计算复杂度的研究，寻找使回归滤波器 计算量最小的正交多项式。分析了回归滤波器频率响应特性，比较了回归滤波 器与IIR 椭圆地物杂波滤波器的计算复杂度。利用仿真的雷达信号，分析了回 归滤波器的地物杂波抑制性能。回归滤波器实际上是一高通滤波器，它在滤掉 低频地物杂波的同时，对落在滤波器阻带内的天气回波信号同样会造成衰减。 在天气回波信号谱宽固定的情况下，通过改变天气回波信号的平均多普勒频率， 分析了回归滤波器对它的衰减情况。在基于一组实际采集的雷达信号的基础上， 给出了回归滤波器的地物杂波抑制比随着滤波器阶数的变化情况。(Firstly, this dissertation introduces the research background and significance of ground clutter suppression, analyzes the characteristics of the ground clutter and weather signals in the Doppler weather radars and simulates Doppler radar echo signals (It includes ground clutter, weather echo signals and the mixture of them). The simulated signals are used later to study the time and frequency domain ground clutter suppression. Secondly, this dissertation talks about the time domain filtering, gives the basic theory of time domain filtering and describes the design method of the usually used fifth-order elliptic infinite impulse response (IIR) ground clutter filter. In the time domain, the work focuses on the regression filter. From the orthogonal polynomials fit, this dissertation gives the basic theory of the regression filter for ground clutter suppression and the filtering process using a regression filter. Through the study of the computational complexity of regression)

说明：  8通道24Bit同步A/D芯片AD7768的SPI接口例程(SPI interface routine of 8-channel 24bit synchronous A / D chip ad7768)

音乐计算器的设计与实现。完成加减与或比较计算，能显示进位借位零位，能根据结果的正负发出两首不同的音乐。(Design and implementation of music calculator. Complete addition and subtraction and comparison calculation, can display carry and borrow zero, can send out two different music according to the positive and negative results.)

说明：  中科院FPGA的课件！纯英文，比较简单，适合刚刚接触FPGA的小白！(Chinese Academy of Sciences FPGA courseware! Pure English, relatively simple, suitable for Xiaobai who just came into contact with FPGA!)

用于生成adams或recurdyn所需的路面不平度，用于悬架或其他的仿真(Adams or recurdyn used to generate the required road roughness for suspension or other simulation)

说明：  滤波器就是对特定的频率或者特定频率以外的频率进行消除的电路，被广泛用于通信系统和信号处理系统中。(Filter is a circuit that eliminates specific frequencies or frequencies other than specific frequencies. It is widely used in communication systems and signal processing systems.)

十字路口交通灯的单片机控制源代码 红黄绿三灯 还有数码管时间显示(Intersection traffic lights SCM source code red yellow three lights and LED time display)

这是一个完整的工作模块编码在 verilog 检测的旋转车轮的旋转速度。它也给旋转的方向。这可以在 fpga 板直接实施，此模块内还有一个特别的小模块，以生成测试信号的面积。所以你不需要连接一个车轮与旋转编码器来测试 speedo 米。这就是独一无二的关于此模块 ！！！cheerz!! 享受

基于FPGA cyclone III EP3C16F484C6的俄罗斯方块游戏。实现双人进行，屏幕倒置，分数显示，vga接口，键盘接口等功能(Tetris game based on FPGA cyclone III EP3C16F484C6 with functions including double players, screen upside down, score, vga and keyboard interface.)

FPGA与DSP的EMIF通信，EMIF的RAM这方面相应的程序(FPGA and DSP EMIF communication)