Using FPGA realize DDS, can be frequency, amplitude from hardware to complete

这是很全的标准库啊，不是1164.vhd，都是一些加，乘，除，平方等操作的包来的．-This is the standard for the whole ah, not 1164.vhd are some increases, multiplication, addition, operational square packages to come.

说明：  OFDM信号的发送与接收 ，需要自取。时域图，模糊图，削峰。(Sending and receiving of OFDM signal)

DDS的频率转换可以以近似认为是即时的，这是因为它的相位序列在时间上是离散的，在频率控制字改变之后，要经过一个时钟周期之后才能按照新的相位增量增加，所以也可以说它的频率转换时间就是频率控制字的传输时间，-DDS frequency conversion can be considered similar to real-time, this is because it is the phase sequence in time is discrete, in the frequency control word change after one clock cycle to go through before a new phase in accordance with the incremental increase, so it can be said of the frequency switching time is the frequency control word transmission time,

《Verilog HDL 程序设计教程》5-"Verilog HDL Design Guide" 5

这是一篇现代通信原理课程的作业报告.题目为几种时频分析方法比较及应用.详细介绍了短时傅里叶变换、小波变换、魏格纳—威利分布和Cohen类时频分布这4种典型时频分析方法,并作了比较(This is a modern communication Principle operating report. Entitled Comparison of several time-frequency analysis and 应用. 详细 Jieshao the short time Fourier transform, wavelet transform, Wigner- Willie distribution and frequency distribution of Cohen Lei This four kinds of typical time-frequency analysis method, and compared)

this files describes how to build i2c block modules in verilog hdl and programming them on an fpga device

资源描述针对于Virtex5FPGA的DDR2读写测试的完整工程,已测试可以使用，可以根据自己的ddr2配置自行更改。。。。

自己做的数码管显示的时钟 一个非常简单的FPGA时钟 用累加做的(To do their own digital display clock of the FPGA clock is a very simple to do with the cumulative)

一个简单移位寄存器代码，verilog HDL编写(a simple shift register example，write with verilog HDL)

verilog写的数字频率计的显示模块,可以-written in Verilog Digital Cymometer display module can be