VHDL频率计

给予QPSK调制的OFDM例程，简单明了的表述了OFDM的通信原理(Given OFDM QPSK modulation routine, simple expressions of OFDM communication theory)

本文描述了fpga中的亚稳态时如何产生的，以及如何计算亚稳态的平均无故障时间。对了解亚稳态有帮助。-This paper describes the sub-fpga how the steady state, as well as how to calculate the metastable MTBF. The understanding of metastable helpful.

一个很有用的vhdl实用教程，很适合初学者学习，介绍了vhdl的一些基本概念，还有一些经典的实例。-A useful practical VHDL Tutorial, it is suitable for beginners to learn, introduced some basic concepts of VHDL, there are some classic examples.

说明：  基于FPGA的用verilog语言写的，改程序可产生不同调制系数和不同频率的AM波，长按按键切换调制度25 、50 、75 和短按按键切换调制信号频率1k、1.5k、2k、2.5k.(Based on the FPGA using verilog language, change the program can produce different coefficients and different frequency modulated AM wave, long press the button to switch the modulation of 25 , 50 , 75 and short press button to switch the modulation signal frequency 1k, 1.5k, 2k, 2.5k.)

R S编 解 码 实 现 代 码 verilog语言(RS CODE AND ENCODE)

本文介绍一种波导双模双带滤波器的设计方法。(This paper presents a new class of dual-mode dualband filters in which each polarization is dedicated to a selected band. The equivalent circuit is a parallel combination of two inline networks that represent each polarization. A transmission zero is generated between the two bands by properly adjusting the relative orientations of the input and output coupling apertures.)

用VHDL硬件描述语言实现的对FPGA（Cyclone II）的配置的VHDL源代码。-VHDL hardware description language for FPGA (Cyclone II) configurations VHDL source code.

VERILOG语言速查手册,与VHDL齐名的另外一硬件描述语言(verilog language manuals, and the other enjoying VHDL hardware description language 1)

这些代码为 对于基本的FPGA使用模块beep进行了例化 在工程 系统级建模时只需要直接调用就好了(The code for the basic FPGA using the module beep instantiated only need to be called directly in the engineering system-level modeling like)

用VHDL编写的JK触发器  用VHDL编写的JK触发器 用VHDL编写的JK触发器