Re: Viterbi Synchronization

On Aug 30, 3:12 pm, "jeffsimp" <J...@xxxxxxxxxxx> wrote:

My plan is to determine a BER threshold based on measured data. I use a
Bit Error Rate Test(BERT) machine that allows me to inject 'x' dB of noise
onto my encoded stream. My board is expected to perform in within 1 dB of
theoretical with Eb/No ranging from 12 dB down to 2 dB. I plan to
determine a threshold for BER and normalization based on taking an average
of these metrics over 'x' amount of clock cycles when I'm running at Eb/No
= 2dB. This should be my worst case scenario then I can compare it to
measured thresholds at different noise levels. Does this sound similar
to some of the approaches you have used in the past?

That sounds like a good start and similar to the research we did. If
your experience is anything like ours however, you'll find that the
range of values you get from the normalization metric is quite wide,
and the threshold you determine at Eb/N0 = 2dB will not work well
stronger SNR. That's why we decided not to use the normalization +
threshold approach.

Eric



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