Results of IZ7SLZ 16K21A 6C 2S 2015-12-09
18:00 no decode
19:00 Eb/N0 = 4.4 dB BER = 34.1% rank 0 ph uniform
20:00 Eb/N0 = 4.2 dB BER = 34.5% rank 0 ph 0 30 30 60
21:00 Eb/N0 = 3.5 dB BER = 35.5% rank 0 ph uniform
22:00 Eb/N0 = 7.5 dB BER = 27.8% rank 0 ph uniform
23:00 Eb/N0 = 7.1 dB BER = 28.8% rank 0 ph uniform
00:00 no further decodes
Easy decodes with such a strong signal, weakest was about -48 dB S/N
in 2.5kHz. Symbol timing is within 30mS.
Andy wrote:
> I discovered by trial and error The FreqOffset window in
> EbNaut had ot be set to [minus] -3Hz to compensate for the
> positive shift on the input - after spending a fruitless
> few minutes trying at +3Hz . But I suppose this is the
> same meaning and sign as the start time offset...
It should have needed offset +3Hz. Following the principle
of least surprise we would expect +3Hz to mean the signal is
at +3Hz in the input!
Maybe one of us needs to reverse the sign of the Q signal?
--
Paul Nicholson
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