Re: [8023-10GEPON] [Dual-Rate-PMD] First Draft of PMD presentation
Dear Suzuki-san,
You presentation is excellent - thank you. This is what we wanted to get
to!
Once we have the "known economical point" for the 1G APD, then we can bring
the scaling theory to bear on extending it to 10G. And, your analysis has
followed through on this promise, and delivered us some answers.
Sincerely,
Frank E.
-----Original Message-----
From: Ken-Ichi Suzuki [mailto:kenyichi@ansl.ntt.co.jp]
Sent: Friday, February 23, 2007 8:13 AM
To: STDS-802-3-10GEPON@listserv.ieee.org
Cc: Frank Effenberger
Subject: Re: [8023-10GEPON] [Dual-Rate-PMD] First Draft of PMD presentation
Dear Frank and All,
This is Ken-Ichi Suzuki of NTT.
Thank you for your presentation and I am sorry for late response..
I checked your presentation. So I will comment to your presentation and
show my consideration.
In serial configuration with optimized APDs in "PMD 101", I think APD
gain must be optimized for each burst signal reception. I think it is a
little bit complicated.
So I think we should consider the case of serial configuration with 10
Gbit/s optimized APDs (Fixed APD gain) to simplify APD drivers as well.
In attached presentation, I calculate SNR in case of serial
configuration with 10 Gbit/s optimized APDs based on equations in "PMD
101". Please check my presentation and comment on this.
I also roughly estimate required 10 Gbit/s receiver sensitivities for
each dual-rate receiver configuration to achieve 1G receiver sensitivity
(OML) of -27.6 dBm (Please refer Tatsuta-san's email) considering
receiver sensitivity difference between 10G and 1G receivers.
Best regards,
Ken-Ichi
Frank Effenberger wrote:
> All,
>
>
>
> Please find attached my first draft of what I call the "PMD101"
presentation.
>
> This is basically taking the highlights out of Chap. 4 of Agrawal's
textbook.
>
> Comments, improvements, etc are all welcome. Please chime in.
>
>
>
> You will note that the last page touches on the FEC superating topic
(hence the
> subject line above). From the PMD side, the answer is very simple: if you
want
> to go 7% faster, you indeed need 7% more light power to get the same SNR.
At
> least, this is true if the receiver is extensively optimized. Sub-optimal
> receivers might exhibit smaller penalties, since they don't attempt to get
the
> last ounce of goodness at the lower rate.
>
>
>
> I will start a separate thread on the FEC issue, so hold discussions on
that
> topic until then.
>
>
>
> Sincerely,
>
> Frank E.
>
>
>
>
>
>
----------------------------------------------------------------------------
----
>
> *From:* Frank Effenberger [mailto:feffenberger@huawei.com]
> *Sent:* Thursday, January 18, 2007 12:18 AM
> *To:* STDS-802-3-10GEPON@listserv.ieee.org
> *Subject:* [8023-10GEPON] [Dual-Rate-PMD] Call for interest.
>
>
>
> All,
>
>
>
> This is just a quick note to alert everybody to our work item on dual rate
> 1G-10G PMD for EPON.
>
> The group will use the exploder for all correspondence, but we will try to
> include the tag [Dual-Rate-PMD] on all Emails.
>
> If you couldn't care less about the topic, you can set your Email filters
> appropriately.
>
>
>
> To the matter at hand, I think the first order of business is to prepare a
short
> tutorial slide-set that covers the key issues of PMD design and link rate.
>
> Those considerations are at the base of the problem that we face. Stay
tuned
> for more details.
>
>
>
> On a side issue, we also had a question on the issue of modifying the line
rate
> to accommodate FEC. The tutorial mentioned above will also inform that
debate,
> in that it will quantify the PMD sensitivity penalty that comes from link
rate
> increase. A bonus, free of charge. J
>
>
>
> Sincerely,
>
> Dr. Frank J. Effenberger
>
> Huawei Technologies USA
>
> 1700 Alma Drive, Plano TX 75075
>
> Office (732) 625 3002
>
> Cell (908) 670 3889
>
--
Ken-Ichi Suzuki
NTT Access Network Service Systems Labs.
E-mail:kenyichi@ansl.ntt.co.jp
Tel:+81-43-211-3189/Fax:+81-43-211-8250