ADC0809模数转换

脉冲多普勒雷达回波信号相干积累的VHDL源程序(pulse Doppler radar echo signal coherent accumulation of VHDL source)

基于FPGA的神经网络硬件实现中的关键问题研究，适合用fpga研究神经网络的工程人员参考(FPGA-based hardware implementation of neural networks in the study of key issues for research with neural networks fpga reference works)

针对电力电子领域的需求，采用自然采样法设计了一个全数字三相SPWM信号产生系统IP软核．通过数字频率合成技术实现了对电源频率的辅确控制．使电源频率精度达到16位．其中。通过调节控制参数．分别实现了电源频率与载波频率的7级、8级控制．最后。搭建了基于FPGA的测试系统．验证了系统功能的正确性．(According to the requirement of power electronics, the natural sampling method for the design of a full digital three-phase SPWM signal generation system. The power frequency of IP core is the auxiliary control is implemented through digital frequency synthesis technology. The power frequency accuracy of 16. By adjusting the control parameters, 7 and 8 levels of power frequency and carrier frequency are realized respectively. Finally, the control of the power frequency and carrier frequency is realized. A test system based on FPGA is built, which verifies the correctness of the system function)

FPGA驱动VGA在电脑显示屏上显示彩条                                                                                                                        附有注释

本实验室练习的目的是为了了解有关生成内核的项目和实施上斯巴达 2 设计的概念或斯巴达 3 板.Xilinx 是可编程逻辑市场中的最大供应商。其 Fpga 在世界使用最广泛。目前其 Fpga 主要分为 3 家庭 ︰ 容量 7(most powerful)，Kintex-7(mid-range) & Artix-7(least powerful)，7 代表当前一代。起初，有只有两个，高功率 （容量系列） 和高容量 （斯巴达系列）。斯巴达 3 已经做过的最广泛使用 FPGA 之一，目前很多教育机构使用它向学生传授数字逻辑设计。

时间同步后即可确定每帧数据的起始位置，这样就能完整的截取下每一帧。但是，数据中还带有频偏信息。在常规的通信系统中，多普勒很小仅仅会带来很小的频偏，但是在大多普勒的情况下，频偏将非常大，20马赫的速度将会带来将近34K的频偏。因此，如何很好的纠正频偏即为本系统的难点。 OFDM中，我们将大于子载波间隔倍数的频偏称为整数倍频偏，而将小于一个子载波间隔的频偏称为小数倍频偏。频偏矫正精度只要能保证小于十分之一倍的子载波间隔，频偏就不会对均衡和解调造成影响。本文中我们借鉴这种思想，由于硬件资源限制，我们将在接收端做64点FFT，即相当于将频域划分为64份，我们将小于 的频偏称为小数倍频偏，将 整数倍的频偏称为整数倍频偏。本程序即基于SCHIMDL经典方法完成小数倍频偏纠正(After time synchronization can determine the starting position of each frame data, so you can complete the interception of each frame. However, in the data with frequency information. In conventional communication systems, doppler small will bring only small deviation, but in the case of most of the doppler, frequency PianJiang is very large, 20 Mach speed will lead to deviation of nearly 34 k. Therefore, how to good to correct deviation is the difficulty of this system. OFDM, we will be bigger than the sub-carrier spacing ratio of frequency deviation is called the integer frequency offset, and the interval will be less than a child carrier frequency offset is called decimal frequency doubling. Deviation is less than one over ten times as long as can guarantee accuracy of sub-carrier spacing, deviation will not affect balance and demodulation. This article, we draw lessons from the idea, due to the limited hardware resources, we will do 64 points FFT at the receiving end, which is equ)

好用的SDRAM控制器，经过FPGA平台验证过。(It is a SDRAM controller with verilog code. It is a good code, and confirmed.)

Verilog HDL教程 什么是Verilog HDL？ Verilog HDL 硬件描述语言(What is a Verilog HDL tutorials Verilog HDL? Verilog HDL hardware description language)

一个全加器和，增加了二进制数和帐户进行的值以及。一一位全加器加三一位数字，通常写成 ；A，B，和 ； ；CIN； ；一 ；和 ；B  ；是操作数，和 ；CIN  ；是一位从以前的少重要阶段。[ 2 ]  ；全加器通常是在一个级联的加法器的一个组成部分，其中添加8、16、32，等位的二进制数。该电路产生一二位输出，输出端和通常由信号 ；cout  ；和 ；S，

此源码为线性相位滤波的vhdl源码与设计心的体会，理论分分析与工程实践总结相结合，有非常大的参考价值 可直接使用。 (The source for the linear phase filter VHDL source code and design of the heart experience, theoretical analysis to summarize the combination of engineering practice, a very large reference value can be used directly.)