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function save_csv(filename, signal)
% SAVE_SC16Q11 Write a normalized complex signal to a CSV file in the
% as integer bladeRF "SC16 Q11" values.
%
% FILENAME is the target filename. The file will be overwritten if it
% already exists.
%
% SIGNAL is a complex signal with the real and imaginary components
% within the range [-1.0, 1.0).
sig_i = round(real(signal) .* 2048.0);
sig_i(sig_i > 2047) = 2047;
sig_i(sig_i < -2048) = -2048;
sig_q = round(imag(signal) .* 2048.0);
sig_q(sig_q > 2047) = 2047;
sig_q(sig_q < -2048) = -2048;
sig = [sig_i sig_q];
csvwrite(filename, sig);
end
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