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Home networking battle continues: one person's view

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re: Home networking battle continues: one person's view
SoCalTechGuy   7/1/2009 5:12:53 PM
It is truly amazing what the power-line communications guys have been able to achieve. However... I'm with you in that power-line is a ugly channel and difficult to often time impossible to send any appreciable amount of data consistently and we are not even talking about maintaining any Quality-of-Service (QoS). We have tested many of the Power solutions out there claiming to be 200 Mbps, 400 Mbps at found most of them to average in the tens of Megabits not hundreds. Now don't get me wrong even tens of Mbps is pretty impressive given the channel. But it is clearly not hundreds of Mbps. I now hear of one company "Claiming" Giga bit data rates on powerline. That's an interesting number given that from an FCC regulatory limit Powerline communications is limited to 30 MHz and less. That would translate to better than 33 bits per Hz!!! what modulation are they using for that? QAM-4,000,000,000 anyone? Sounds like their Marketing department wrote the specifications and not Engineering.

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