With DFS2, many have referred to "signatures"and "patterns" to detect to determined radar is heard. But it has also been stated, it had to be heard at a signal level of "x" (near -30).
With 802.11a, a 20 Mhz channel can not decipher/hear 10Mhz channels, nor 10Mhz channels hear/decipher 20Mhz channels except as noise. Can DFS2 card features hear radar signatures regardless of whether card is set to 10 Mhz vs 20Mhz channel size. And if so, how come this is different than the above 802.11a situation? Anyone know the technical detail on how works. Does this have anything to do with why some Wifi OEM software/hardware can't be designed to pass DFS2 certification without periodic service disruption? The reason I'm asking this is.... If the Wifi card was capable of hearing Radar (a non-standard wifi signal) while actively transmitting on a wifi channel, or prior to a client CPE association, regardless of channel size, shouldn't it also be possible to For the wifi card receiver to hear other non-802.11a noise while not associated? How come manufacturers can;t make their software/hardware combos perform real spectrum scans, to pick up non-wifi devices, like Trango, Canopy and Alvarion can do? Is this a hardware limit? Or is it a Software development toolkit / Driver problem, not allowing access to those features of the hardware? Or a software OS problem that potentially could be added? Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Michael Baird" <[email protected]> To: "WISPA General List" <[email protected]> Sent: Tuesday, April 21, 2009 9:26 AM Subject: [WISPA] Wimax 802.16d v 802.16e > I'm researching these two technologies and Wimax in general, does anyone > have any firsthand experience with the two current different types of > Wimax, or references to the differences in the two different types of > technologies for broadband fixed rural deployments? > > Regards > Michael Baird > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
