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[IP] WLANs are jump-starting cognitive radio



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From: Dewayne Hendricks <dewayne@xxxxxxxxxxxxx>
Date: November 16, 2004 4:59:29 AM EST
To: Dewayne-Net Technology List <dewayne-net@xxxxxxxxxxxxx>
Subject: [Dewayne-Net] WLANs are jump-starting cognitive radio
Reply-To: dewayne@xxxxxxxxxxxxx



[Note:  This item comes from reader Jack Powers.  DLH]


From: Jack Powers <pheezer@xxxxxxxxxxxx>
Date: November 15, 2004 2:08:04 PM PST
To: Dewayne Hendricks <dewayne@xxxxxxxxxxxxx>
Subject: WLANs are jump-starting cognitive radio



        WLANs are jump-starting cognitive radio

        Posted : 16 Nov 2004

        Cognitive radio might seem to be a radical concept,
but WLAN designers have already implemented many CR
techniques, some of which are quite sophisticated.
Because these techniques can be expanded in an
evolutionary way to achieve the full promise of CR, they
point the way toward the future of wireless
communications.

        The basic premise of CR is that radios can better
use the available spectrum by detecting their
environment and adapting accordingly. Regulatory
agencies such as the FCC require that 802.11a radios
detect radar signals and avoid interfering with them.
This ability to dodge radar requires a significant
amount of CR-type adaptability and it is just the
beginning of WLAN CR capabilities.


<snip>
http://www.eetasia.com/article_content.php3?article_id=8800351549



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