一个关于DPSK收发的完整FPGA工程代码，包括调制，解调，数字上下变频，滤波器等

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Altera NCO Compiler version 2.2.0 % file : nco_Fc_tb.m % % Description : The following Matlab testbench excercises the NCO model nco_Fc_model.m % generated by Altera's NCO Compiler Megacore and outputs the sine and cosine waveforms % to the variables sin_out and cos_out respectively % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Parameter description % N : the length of input and output arrays % fs : the desired sampling rate. For Multi-channel NCO's the channelized sample rate is fs/M % ehre M is the number of channels %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% N=2048*1; fs = 2.5E7; % Input arrays % phi_inc_i : input phase increment : Length N (required) phi_inc_i = 171798692.*ones(1,N); % freq_mod_i : frequency modulation input : Length N (optional) freq_mod_i = zeros(1,N); % phase_mod_i : phase modulation input : Length N (optional) phase_mod_i = zeros(1,N); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % function call to generated nco function [sin_out,cos_out] = nco_Fc_model(phi_inc_i,phase_mod_i,freq_mod_i); fid_s = fopen('fsin_o_nco_Fc_matlab.txt','w'); for i=1:N fprintf(fid_s,'%f\n',sin_out(i)); end % Plot Channel 0 Time-Domain Output xvalst = (0:1/fs:((N/1)-1)/fs); figure,stairs(xvalst,sin_out(1:1:N),'r'); title ('Time-Domain Plot of NCO Channel 0 Output'); grid on; zoom on; xlabel ('Time'); ylabel ('Amplitude'); ncofftwinplot(sin_out(1:1:N),fs,0,'r');