ifft.v

基于Xilinx+FPGA的OFDM通信系统基带设计-程序

module FFT_Pro(clk20M,clk60M,rst_n,inEn,dataInR,dataInI,outEn,dataOutR,dataOutI,bitIndex);
  input clk20M;
  input clk60M;
  input rst_n;
  input inEn;
  input [7:0]dataInR;
  input [7:0]dataInI;
  output outEn;
  output [7:0]dataOutR;
  output [7:0]dataOutI;
  output [5:0] bitIndex;


  wire [7:0]bitInR;
  wire [7:0]bitInI;
  wire symEn;
  wire FFT_set;
 
  change60 change60 (     //change input data from 20MHz to 60MHz
    .clk20M(clk20M), 
    .clk60M(clk60M), 
    .reset(rst_n), 
    .inEn(inEn), 
    .outEn(symEn), 
    .dataInR(dataInR), 
    .dataInI(dataInI), 
    .dataOutR(bitInR), 
    .dataOutI(bitInI), 
    .FFT_set(FFT_set)
    );

  wire dv;
  wire [7:0]bitOutR;
  wire [7:0]bitOutI;
  wire outEn_fft_burst;
 
  fft_Burst fft (        //IFFT using burst mode under 60MHz
    .bitInR(bitInR), 
    .bitInI(bitInI), 
    .inEn(symEn), 
    .FFT_set(FFT_set), 
    .Gclk(clk60M), 
    .rst_n(rst_n), 
    .dv(dv), 
    .bitOutR(bitOutR), 
    .bitOutI(bitOutI), 
    .outEn(outEn_fft_burst)
    );

  channge20 change20 (    //change output of IFFT from 60MHz to 20MHz
    .clk20M(clk20M), 
    .clk60M(clk60M), 
    .reset(rst_n), 
    .inEn(outEn_fft_burst), 
    .outEn(outEn), 
	 .bitIndexOut(bitIndex),
    .dataInR(bitOutR), 
    .dataInI(bitOutI), 
    .dataOutR(dataOutR), 
    .dataOutI(dataOutI)
    );
	 
  endmodule