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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 gPMD 101h, 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 gPMD 101h. 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-sanfs 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 gPMD101h presentation. > > This is basically taking the highlights out of Chap. 4 of Agrawalfs 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 donft 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 couldnft 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
Consideration_of_dual-rate_receiver.ppt