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function [ret] = save_grcomplex(filename, signal)
% SAVE_GRCOMPLEX Write a normalized complex signal to a binary file in the
% GNU Radio complex float format.
%
% [RET] = save_grcomplex(FILENAME, SIGNAL)
%
% RET is 1 on success, and 0 on failure.
%
% FILENAME is the target filename. The file will be overwritten if it
% already exists. The file data is written in little-endian format.
%
% SIGNAL is a complex signal with the real and imaginary components
% within the range [-1.0, 1.0].
[f, err_msg] = fopen(filename, 'w', 'ieee-le');
if f ~= -1
sig_i = real(signal);
sig_q = imag(signal);
sig_len = 2 * length(sig_i);
sig_out(1:2:sig_len-1) = sig_i;
sig_out(2:2:sig_len) = sig_q;
count = fwrite(f, sig_out, 'float');
fclose(f);
if count == sig_len;
ret = 1;
else
ret = 0;
end
else
error(err_msg);
ret = 0;
end
end
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