VHDL source VHDL source VHDL source

真是基于matlab的QPSK，格雷码，瑞利衰减信道，加性高斯白噪声仿真(Really based on matlab QPSK, Gray code, Rayleigh fading channel additive white Gaussian noise simulation)

说明：  使用Verilog编写的24位定时器，具有apb 总线接口，可以设置工作方式和计数初值。(The 24-bit timer written by Verilog has APB bus interface, which can set working mode and count initial value.)

Verilog 语言写的控制 DAC8568 的模块，DAC8568 是SPI接口。(Verilog language used to write the control module DAC8568, DAC8568 is SPI interface.)

本源码为Nios II的开发示例,主要演示Nios II的SPI总线设计。开发环境QuartusII。 本示例十分经典，对基于SOPC开发的FPGA初学者有很大帮助。-The source code for the Nios II development of an example, the main demonstration Nios II design of the SPI bus. Development environment QuartusII. This example is very classic, FPGA-based SOPC development of great help for beginners.

能够完美产生数字地面电视（DTMB）的信源的程序。帧头模式为模式一。信道可选择，信号加入频偏，延时，后经滤波器后输出。(Able to produce perfect digital terrestrial television (DTMB) of the source program. Mode is the mode a header. Channels to choose from, the signal adding offset, delay, after the filter output.)

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)

FPGA实现 DDS_讲的非常详细,师兄的一片论文-FPGA realize DDS_ talked about in great detail, of a senior thesis

基于VHDL编写的10进制显示输出，基于16进制的10进制控制，适合初学者(VHDL-based display output written in decimal, hexadecimal, 10 hexadecimal-based control, suitable for beginners)

基于FPGA的7x7块交织器设计，程序分交织、解交织两部分，并在QUARTUS II 9.0 下仿真通过，内附模块详细端口说明及仿真分析文件。

vhdl波形发生程序.实现4种常见波形正弦、三角、锯齿、方波（A、B）的频率、幅度可控输出（方波 A的占空比也是可控的），可以存储任意波形特征数据并能重现该波形，还可完成 各种波形的线形叠加输出。 -vhdl waveform occurred procedures. 4 achieve common sinusoidal waveform, 1.30, sawtooth, square-wave (A, B) the frequency and amplitude control output (square A duty cycle is also controllable), can store data of arbitrary waveform characteristics and able to reproduce the waveform, but also through a variety of linear superposition of the waveform output.