VHDL语言实现PWM信号，非常方便的使用

《精彩51单片机教程》适合初学者，很难得(" Discover the 51 SCM Guide" for beginners, very rare)

VHDL同步串口发送部分，基于Xilinx ISE的编程平台(synchronous serial port sending part on VHDL)

研究信道噪声对M-ary QAM的影响，适合数字通讯从业者(Effect of channel noise on M-ary QAM in)

利用平方环法提取同步载波的FPGA实现的仿真(FPGA implementation of synchronous carrier extraction using square loop method)

基于DE2-115的数字时钟 1.液晶显示，数码管显示 2.整点报时 3.闹钟 4.设置时间 5.设置闹钟(Digital clock based on DE2-115 1. LCD display, digital tube display 2. whole point 3. alarm clock 4. setting time 5. set the alarm clock)

lattice ECP3系列高速FPGA serdes测试代码(lattice ECP3 series high speed serdes test code)

说明：  基于IIC协议的EEPROM模型，可实现串行数据转并行数据，并行数据转串行数据，分为EEPROM模块，EEPROM_WR模块，signal模块，Top模块(The EEPROM model based on IIC protocol can convert serial data to parallel data and parallel data to serial data. It is divided into EEPROM module and EEPROM module_ WR module, signal module, top module)

FPGA设计中的60进制计数器，通过2个七段数码管系那是出来。代码简单易懂，仿真通过，而且在FPGA开发板上加载显示成功。很有用的入门代码。

。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)

FPGA的存储器代码的VHDL,verilog描述及测试代码-FPGA memory code VHDL, verilog description and test code