[ibis-macro] Re: Samples per bit for AMI

  • From: "Walter Katz" <wkatz@xxxxxxxxxx>
  • To: <Arpad_Muranyi@xxxxxxxxxx>, <ibis-macro@xxxxxxxxxxxxx>
  • Date: Mon, 3 Oct 2011 12:00:28 -0400 (EDT)

Arpad,

If the model has some limitation on samples per bit, then it should treat 
the incoming waveform as a sampled continuous waveform and use Nyquist 
sampling techniques to convert it to an optimal samples per bit and then 
reverse the process on the way out. Any execution performance loss because 
the model has a sample converter will be the same if done by the EDA tool.

Walter

-----Original Message-----
From: ibis-macro-bounce@xxxxxxxxxxxxx 
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad
Sent: Monday, October 03, 2011 11:51 AM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] Re: Samples per bit for AMI

I would like to ask a question before I write a BIRD for spelling out the 
rule that samples_per_bit is determined by the EDA tool and the AMI model 
has to be able to handle ANY sapling rate the tool decides to use.

Aside from "bad" models which were clearly developed in an inferior manner, 
what if there is a real need to limit the minimum or maximum samples_per_bit 
for some valid and justifiable technical reasons?

I know the model could have a sample rate converter to accommodate some of 
those needs, but this adds an overhead to the execution time.  What if the 
model maker wants a super efficient algorithm to be able to go to extremely 
low BER results?  Etc...

I feel that leaving the determination of the sampling rate entirely up to 
the EDA tool may not always work and that we need to have a way for the 
model to let the EDA tool know what the limits for samples_per_bit are.

Comments?

Thanks,

Arpad
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