VGA信号的产生

。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)

本程序利用VHDL实现二维离散余弦变换，经本人测试，在Quartus II7.0软件上可正确仿真，希望大家积极采纳

256字节深度的RS232串口程序,共分4个模块,顶层文件FIFO程序串口收和串口发.经过测试已用于产品.可靠!-Depth of 256-byte Serial RS232 procedures, divided into four modules, top-level document procedures FIFO serial and serial-fat collection. After the test has been used in products. Reliable!

在FPGA上实现CAN总线SPI接口通信，使用Verilog语言(Realize SPI interface communication of CAN bus on FPGA, using Verilog language)

fpga实现的IIC通信的例程，注释很详细(fpga implementation of serial communication routines, comments in great detail)

在这里，我们目前使用 VHDL 的 8 位 crc 设计。循环冗余校验是讨论检测错误的通信，使用 vhdl 语言这一过程变得快速和可靠。

*** ***OC_I2C_Master使用说明*** ***** 使用步骤：1.将OC_I2C_Master文件夹拷贝到安装盘alterakits ios2components目录下。 之后重新打开SOPC Builder，在可用元件列表的DeviceSOPC组中将出现OC_I2C_Master 元件，即可像其它Altera外设元件一样添加和使用。 2.hdl文件夹中包含有描述i2c逻辑的硬件描述文件，不能删除。 3.HAL文件夹包含硬件抽象层所需的文件（即驱动），不能删除。 4.inc文件夹包含有定义底层硬件的C语言头文件，不能删除. 5.I2C_doc文件夹下有关于该元件的开发文档。-********* OC_I2C_Master use*********** use these steps: 1. OC_I2C_Master folder will be copied to the installation disk alterakits ios2components directory. Re-open after the SOPC Builder, a list of available devices will appear DeviceSOPC Group OC_I2C_Master components, can be similar to other peripheral devices like Altera add and use. 2.hdl folder contains logical description i2c hardware description files, can not be deleted. 3.HAL folder contains the necessary hardware abstraction layer file (ie drivers), can not be deleted. 4.inc folder contains the definition of the underlying hardware C language header files, should not delete. 5.I2C_doc folder on the developmen

the transmitter and receiver modules for serial communication

完成交通灯的所有功能，已经通过验证。希望大家多多指教。(Completion of all the features of traffic lights, have been authenticated. Hope the exhibitions.)

数字密码锁的vhdl实现，包括设置密码，修改密码，报警。