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% ofdm_time_sync.m
% David Rowe June 2019
%
% Tests ofdm modem sync time, using real, off air files
function ofdm_time_sync(filename, Ntrials=10)
time_to_sync = []; passes = fails = 0;
for toffset=0:Ntrials-1
atime = ofdm_ldpc_rx(filename, mode="700D", interleave_frames = 1, "", start_secs=toffset, len_secs=5);
if atime != -1
passes++;
time_to_sync = [time_to_sync atime];
else
fails++;
end
end
printf("pass: %d fails: %d mean: %3.2f var %3.2f\n", passes, fails, mean(time_to_sync), var(time_to_sync));
figure(1); clf; plot(time_to_sync);
endfunction
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