At 4:11 PM -0400 6/22/07, Manfredi, Albert E wrote:
John Shutt wrote:At the 2000 NAB, Sinclair used HM-COFDM to delivered 13.6 Mbps to fixed receivers on the exhibition floor using indoor antennas, and simultaneously delivered 4.5 Mbps to a portable Nokia Mediascreen that worked everywhere in Las Vegas, including in a car traveling at well over the legal highway speed limit, and could only be made to fail when shut inside of a transmitter cabinet. At the 2007 NAB, A-VSB delivered 14 Mbps to fixed receivers and 500 Kbps to mobile receivers that never broke 25 MPH.Question 1: Did you do a C/N margin comparison? If not, why not? What are we comparing here? Question 2: Did the mobile test try highway speeds for A-VSB? If not, why not? What are we comparing here?
The Samsung R&S A-VSB mobile demo did get onto a freeway and I would guess the spped was up to 45-50 MPH. This did not cause any major problems - perhaps a few more break-ups for the less robust constellations that were demonstrated.
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