how to perform frequency shift or frequency correction in simulation using HDL NCO and LOOKUP table(LUT) in order to generate HDL code

for the below mentioned exponential part contain code,

% 5MHz carrier

fs = 7.68;

tdw=LTE5_3_1.waveform;

%% SHOLDER REMOVING

shape5_out = conv(tdw,shape5);

%% UPSAMPLING AND LOW PASS FILTERING

fs3 = 491.52;

up5_out = interp(shape5_out,64);

%% NCO operation

fc4 = 40; %shift by 40 Mhz

for ii = 1:length(up5_out)

carr_1shifted(ii) = up5_out(ii).*exp(1i*2*pi*fc4/fs3*ii);

end

data_complex = complex(real(up5_out), imag(up5_out));

complex_timeseries = timeseries(data_complex);

Answer 1

[Kranti Balaga]

Your logic can be replicated with the help of the NCO HDL followed by mulitplier. Similar application, we used to correct the frequency offset in our Simulink receivers. You can see here in the Coarse Frequency Compensator subsystem.