<story><title>Vortex radio waves could boost wireless capacity “infinitely”</title><url>http://www.extremetech.com/extreme/120803-vortex-radio-waves-could-boost-wireless-capacity-infinitely</url></story><parent_chain></parent_chain><comment><author>femto</author><text>Nature has a clearer report.&lt;p&gt;&lt;a href=&quot;http://www.nature.com/news/2011/110222/full/news.2011.114.html&quot; rel=&quot;nofollow&quot;&gt;http://www.nature.com/news/2011/110222/full/news.2011.114.ht...&lt;/a&gt;&lt;p&gt;It  bears a similarity to MIMO, in that MIMO initially promised &quot;infinite&quot; capacity.  MIMO did give an improvement in capacity, but it wasn&apos;t infinite, the limit being related to the volume occupied by the antenna array (see papers by Leif Hanlen).  One has to think that this technology will turn out to have a similar limit on fuller analysis.  In fact one has to wonder whether the limit will turn out to be exactly the same, and whether it turns out to be a form of space-time coding?  After all, one could presumably emulate the &quot;slotted parabolic dish&quot; antenna mentioned by using a suitably coded antenna array?</text></comment>
<story><title>Vortex radio waves could boost wireless capacity “infinitely”</title><url>http://www.extremetech.com/extreme/120803-vortex-radio-waves-could-boost-wireless-capacity-infinitely</url></story><parent_chain></parent_chain><comment><author>DanielBMarkham</author><text>This has the feel of one of those articles that promise much more than it delivers. But the site is good, the idea interesting, and it definitely could be a game-changer. If this pans out, it also has interesting implications for SETI, because if our receivers are set up in a different configuration than some potential sender might be, we&apos;ll never receive anything.</text></comment>