[ibis-macro] Re: FW: some suggestion for AMI proposal
- From: "C. Kumar" <ckumar@xxxxxxxxxxx>
- To: "Huang chunxing" <huangchunxing@xxxxxxxxxx>
- Date: Tue, 21 Nov 2006 08:25:46 -0500
so just to clarify, you want 'error correction methods' as part of the
initial standard. am i reading your right?
________________________________
From: Huang chunxing [mailto:huangchunxing@xxxxxxxxxx]
Sent: Tuesday, November 21, 2006 7:39 AM
To: C. Kumar
Cc: ibis-macro@xxxxxxxxxxxxx
Subject: Re: [ibis-macro] FW: some suggestion for AMI proposal
Kumar,
Thanks for your reply. I really wish initial version of AMI
could have solution for analytical model of error propagation and FEC.
IBIS model could handle this analytical model just as receiver
equalizer.
10Gbps standards for backplane have FEC available. CEIP of OIF
have enclosed fire code with ability of correcting 7 burst error.
802.3ap has optional QC(2112,2080) to correct 11 burst error. So I
believe in order to extend IBIS to 10Gbps and even higher data rate,
analytical model of error propagation and FEC is just as important as
receiver equalizer and it will be better for you to finish this work at
this time.
Regards,
Huang
Huawei Technologies Co.,Ltd.
Tel: 86 755 28976229
FAX: 86 755 28976758
Email: huangchunxing@xxxxxxxxxx
<mailto:huangchunxing@xxxxxxxxxx>
Web: http://www.huawei.com <http://www.huawei.com>
----- Original Message -----
From: Lance Wang <mailto:lwang@xxxxxxxxxxx>
To: ibis-macro@xxxxxxxxxxxxx
Cc: C. Kumar <mailto:ckumar@xxxxxxxxxxx> ; Ray Komow
<mailto:komow@xxxxxxxxxxx> ; Hemant Shah <mailto:shah@xxxxxxxxxxx> ;
Ken Willis <mailto:kwillis@xxxxxxxxxxx>
Sent: Monday, November 20, 2006 11:16 PM
Subject: [ibis-macro] FW: some suggestion for AMI
proposal
________________________________
From: C. Kumar
Sent: Monday, November 20, 2006 9:26 AM
To: Lance Wang
Cc: Hemant Shah; Ken Willis; Ray Komow
Subject: RE: [ibis-macro] some suggestion for AMI
proposal
lance, can you send this on behalf of me?
huang:
Thanx for your comments. I have heard and read about the
importance of dfe error propagation.
This is first version of the spec (AMI) which is
confined to basic filtering of signals. The interface functionally
separates the filtering, from other data processing. So strictly it
addresses physical or virtual modification of a data stream.The data
stream is generated and handed over by the EDA domain, which is then
filtered and modified in the ip domain.
The focus of this current ami interface is to keep it
simple yet useful and evolvable.
While this version of the interface indeed allows for
passing unlimited amount of filter specific parameters, it does not
contain knowledge and actions pertaining to particular filter types like
DFE. e.g. It does not specifically address issues like error
propagation.
Your suggestions will be most welcome.
________________________________
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Huang chunxing
Sent: Monday, November 20, 2006 4:28 AM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] some suggestion for AMI
proposal
Hi Kumar and all,
First let me introduce myself. My name is Huang
Chunxing and I'm a backplane engineer from Huawei.
I have read your AMI proposal to IBIS macro
model task group. It's a great idea to solve that IBIS couldn't handle
the DSP algorithm problems. In the paper, I noticed that AMI also need
to meet the requirement of proprietary post-processing of data. I
totally agree that.
In my opinion, the error propagation of DFE is
very good case for this. One error bit of DFE will effectively change
the error probability of sequential bits, depending on the DFE taps and
coefficients. If we want to analyse the DFE error propagation effect, we
need to know the coefficients of DFE. But I didn't find any output
params of the defined ami functions related to it, including AMI_init
and AMI_getwave. In order to keep the IBIS with most updated DSP
algorithm, some extra user defined params may be required. I hope you
and group member will consider my suggestion. By the way, I know little
about dll. If my understanding is wrong, I apologize first. Thanks!
Regards,
Huang
Huawei Technologies Co.,Ltd.
Tel: 86 755 28976229
FAX: 86 755 28976758
Email: huangchunxing@xxxxxxxxxx
Web: http://www.huawei.com
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