FPGA based implementation of a SDR

理想三相转单相 基于 spwm 的逆变器，可调(Ideal three-phase switch to a single the phase based spwm inverter)

在quartus软件下用VHDL语言实现DDS，可产生正弦，余弦，方波，三角波以及锯齿波。-In the Quartus software using VHDL language realize DDS, can generate sine, cosine, square, triangle and sawtooth waves.

数字秒表的实现，我还写个具体的过程要求等，(there is function of clock,it very useful)

THE IMPLENTATION OF THE MAC PROTOCOL USING THE FPGA ALTERA 3

关于SPI应用VHDL程序。供新手学习用。-Application of VHDL on the SPI procedures. For novices to learn.

sram 6bit仿真模型，verilog编写(sram 6bit simulation model, verilog prepared)

数字滤波器包含IIR数字滤波器和FIR数字滤波器。本设计的工作主要是Labview软件部分，包括信号生成模块、滤波模块、显示模块的设计(IIR digital filter comprises a digital filter and FIR digital filters. The design work is mainly Labview software parts, including signal generation module, filter module, display module design)

主要编写了一组二进制数据通过根升余弦滤波器后的波形，但并没有使用ISE内部的FIR滤波器内核，该程序相当于编写了一个根升余弦滤波器。(Mainly prepared a set of binary data through the root raised cosine filter waveform after, but did not use the ISE internal FIR filter kernel, the program is equivalent to the preparation of a root raised cosine filter.)

SHIFT_8REG是8位的一个具有移位功能的寄存器，每一次数据打入都会从这个寄存器的最低位打入，并相应进行向左移位。 ODD_110BREG是一个3位的备份寄存器，寄存器中存放的是奇数帧的同步头，也就是110。 EVEN_9BHREG是一个8位的备份寄存器，寄存器中存放的是偶数帧的同步头，也就是10011011。这两个寄存器的初始值在系统一开始就打入。 -SHIFT_8REG is eight with a displacement of the functional Register, Each will enter the data from the register into the lowest point, and the left shift accordingly. ODD_110BREG is a three backup Register, the Register is stored in the odd frame synchronization head, is 110. EVEN_9BHREG 8 is a backup Register, which register is kept even the first frame synchronization, is 10011011. This register the two initial value of the system into a start.

利用FPGA，产生三相SPWM波，与后继硬件电路配合，形成三相电源。高效，实用。(Using FPGA, produce three-phase SPWM wave, with subsequent hardware circuit with the formation of three-phase power. Efficient and practical.)