Hello, Recently I read a paper http://calypso.unicauca.edu.co/gntt/grupo/maestria/MaterialBandaAnchaInalambrica/channel_models/1385clar.pdf The result is: with receiver diversity, adaptive RLS frequency-domain equalization(and channel tracking) can track speed up to 100 miles/hour, while its signle antenna counterpart has poor tracking capability. I wonder why diversity can improve tracking. Furthermore, does diversity helps time domain channel tracking? Thanks!
Does diversity helps channel tracking?
Started by ●June 23, 2008
Reply by ●June 25, 20082008-06-25
On Jun 23, 8:07�am, "buaawh" <eewu...@gmail.com> wrote:> Hello, > Recently I read a paperhttp://calypso.unicauca.edu.co/gntt/grupo/maestria/MaterialBandaAncha... > > The result is: with receiver diversity, adaptive RLS frequency-domain > equalization(and channel tracking) can track speed up to 100 miles/hour, > while its signle antenna counterpart has poor tracking capability. > I wonder why diversity can improve tracking. Furthermore, does diversity > helps time domain channel tracking? > Thanks!Diversity techniques are tricky to evaluate fairly because a lot of times it depends on how exactly the problem setup is defined. So I did not read the linked paper, but rather I'll propose the following observation. Any tracking / locationing problem involves some sort of inversion at some point, for example in converting the time-of-arrival or angle-of- arrival estimates into a 3-D location. It is known that such problems depend on the relative geometries of the sensors and the targets. So sure, with more sensors you improve the distribution of the conditioning number required for the inversion. But how much better you can do is dependent on the problem setup.