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Hello Juha,
idea: if Dave's distribution of amplitudes was a little more
benign than the Radar near/far problem, and he would favor full
resolution when the signal is weak, but could live with a bit of
degradation due to quantization when the signal is strong, what
about storing a logarithm of the I and Q magnitudes instead of
their linear value? That way, he could get the same
weak-signal-resolution with less bits, and only suffer
inaccuracies due to quantization for situations where signal is
strong, anyway.
Best regards,
Marcus
On 16.07.2016 21:57, Juha Vierinen
wrote:
Can you reduce the number of bits that you are using?
With radar signals, the receiver noise most of the time
excites only about 8 bits out of 16. Ground clutter or meteor
echoes excite nearly all of the bits occasionally, so I can't
just truncate to 8 bits. In this case, bzip2 actually does a
pretty good job of getting rid of the 8/16 most significant
bits that are zero most of the time. Thus, I get a compression
ratio close to 50% when using sc16. pbzip2 is a good tool for
doing parallel compression on files.
juha
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