A long time ago I made a post about improving the crest factor by changing
to a bit-scrambled output (a la 9600 modems, etc). I was playing with
another idea today, and I'm pretty much convinced that bit-scrambling
doesn't improve anything.
Just looking at the spectrum shows the similarity, but then actually
measuring the peak and rms of the WAV files shows that not much is
happening.
Crest factor Clipping/Scrambled = 8.3491 dB (rms = 0.13624) (peak = 0.35626)
> Crest factor Clipping/Raw = 8.3931 dB (rms = 0.13654) (peak =
> 0.35886)
.044 dB improvement - whoo-hoo...
I seem to remember a technical article about bit-scrambling being highly
effective. Alas, maybe not with a PSK waveform.
73
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