<p dir="ltr">A Skanti já tem equipamentos que fazem isto a muito tempo.</p>
<p dir="ltr">Pedro Almeida<br>
CT5JZX</p>
<p dir="ltr"> NRA: PN063<br>
<a href="http://ct5jzx.nra.pt/">http://ct5jzx.nra.pt/</a><br>
<a href="http://www.qrz.com/db/CT5JZX">http://www.qrz.com/db/CT5JZX</a></p>
<div class="gmail_quote">Em 18/08/2015 15:33, "João Costa &gt; CT1FBF" <<a href="mailto:ct1fbf@gmail.com">ct1fbf@gmail.com</a>> escreveu:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Full duplex! Bristol boffins demo Tx and Rx on the same frequency - at<br>
the same time<br>
<br>
Transmitting and receiving on the same radio frequency, at the same<br>
time, has been demonstrated by the UK's University of Bristol in a new<br>
YouTube video.<br>
<br>
The system being used is running 900MHz and 1800MHz with exactly the<br>
same equipment.<br>
<br>
There are a number of companies working on this technology, called<br>
full duplex radio, a technology traditionally viewed as being<br>
extremely difficult to implement – if not impossible.<br>
<br>
However, what has now seemingly made it possible are improvements in<br>
processing, which allows the noise of the transmitted signal to be<br>
subtracted from the received signal.<br>
<br>
One of the first patents on full duplex was filed by UK-based<br>
electronics, defence and telecoms company Plessey in 1980, for a<br>
combat radio repeater using the tech. This was called "Groundsat" and<br>
was used by the British Army. There was also a patent filed by Bristol<br>
University in the 1990s.<br>
<br>
Read more and watch the video here<br>
<a href="http://www.theregister.co.uk/2015/08/13/" rel="noreferrer" target="_blank">http://www.theregister.co.uk/2015/08/13/</a><br>
full_duplex_radio_tech_bristol_uni/<br>
<br>
Our thanks to Stephen, G7VFY for spotting this item<br>
<br>
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<br></blockquote></div>