- This topic has 4 replies, 1 voice, and was last updated 14 years, 10 months ago by
.
-
Posts
-
Deay guys
what does mean diversity term in GSM? Could somebody explain in a simple way?thanks
NikoHi Niko,
Simple way? Its to increase te receiver sensitivty of GSM Antenna we use.
Detail: Antenna s havin its own limitation to shoot the RF signal to a cerain limit and certain angle. Where as a mobile will be in any distance or in any angle depending on the users wish, now as an operator we need to give the maximum support to the subsrciber. Now takin a single sector we will try to capture the maximum signal sent out by mobile. This is by:
1. Space diversity
2. Polarization Diversity
Space Diversity means to keep 2 antennas for same sector at a distance of 3dB maximum.
Polarization Diversity means keepin the polarization of the plates inside the antenna tilted in such a way that the sensitivity will be at max. Mostly it will be at -45, +45 degrees.Hope am right, and hope u r clear.
Niko & Prabeen,
I just want to share a less technoid way to look at it 🙂
The analogy with human body is nice :
the BTS has two ears, and listen to each MS with its 2 ears.2 ears = 2 antenna path.
The BTS will the recombine both signals, to create the highest quality possible.
This improves the UL sensitivity of the BTS a lot –> It is called “RX Diversity”.
There is also TX Diversity : ths time, the BTS has 2 mouths : same signal is sent through two different antenna paths.
Cheers,
pixDear Pix & Prabeen
thanks a lot for your explanations. As well in some books i see “full diversity” . What does it mean?Beautiful explanation pix.
Well, in same way could u explain wat is RX path loss, and why is there RX Diversity Alarms high in my network?
- The forum ‘Telecom Design’ is closed to new topics and replies.
