[ibis-macro] Re: RX Optimization
- From: Todd Westerhoff <twesterh@xxxxxxxxxx>
- To: gedlund@xxxxxxxxxx
- Date: Fri, 8 Mar 2013 13:45:03 -0500 (EST)
Greg,
RX self-optimization (as opposed to TX/RX co-optimizartion) can happen in
either Init or Getwave (i.e. during either impulse response or waveform
processing). For the optimization to be correct, the input to the RX model must
reflect what the RX will actually see (i.e. include the TX EQ, as you say).
Note that true adaptive equalization (i.e. equalization that changes from bit
to bit) can only be modeled in Getwave.
Todd.
Description: cid:EAFF2D52-4B63-4A05-9D24-B96BE375B7E0@eau.wi.charter.com
Todd Westerhoff
VP, Software Products
Signal Integrity Software Inc. • www.sisoft.com
6 Clock Tower Place • Suite 250 • Maynard, MA 01754
(978) 461-0449 x24 • twesterh@xxxxxxxxxx
“ I want to live like that”
-Sidewalk Prophets
----- Original Message -----
From: "Gregory R Edlund" <gedlund@xxxxxxxxxx>
To: ibis-macro@xxxxxxxxxxxxx
Sent: Friday, March 8, 2013 12:03:39 PM
Subject: [ibis-macro] RX Optimization
Hello IBIS Comrades,
My co-workers and I were having a discussion today about how simulators should
handle TX equalization during RX training. I took an action item to run this
past the Open Forum and make sure I was speaking correctly.
"RX optimization (adaptive equalization), if it exists, occurs during Step 3,
i.e. the call to RX AMI_Init. During optimization the RX algorithmic model must
consider TX equalization, if it exists, and there is more than one way to
accomplish this. Two are documented in the IBIS 5.1."
By the way, Section 10.2.3.2 was clearly written. Most of our questions were
answered simply by reading two pages of the spec.
Greg Edlund
Senior Engineer
Signal Integrity and System Timing
IBM Systems & Technology Group
3605 Hwy. 52 N Bldg 050-3
Rochester, MN 55901
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