- This topic has 18 replies, 1 voice, and was last updated 14 years, 11 months ago by pix.
4th August 2007 at 05:47 #48551IrfanGuest
Why we use hoppoing and what is its benefits.4th August 2007 at 06:01 #48552giriGuest
the channels allocated to a service provider are not always gud in condition( noise free channels)
to avoid this hopping is required
and also we cant stop using the channel which is full of noise4th August 2007 at 08:28 #48553vivekGuest
The main function of using hopping is to reduce the interference & fading problems. Another reason is that by using the synthesiser hopping we can reduce the number of TRX required.4th August 2007 at 10:19 #48554giriGuest
what is the difference between baseband and synthesiser hopping??
i heard two types of answers..
so it ll be better if any tell me abt the spec number i ll read it..6th August 2007 at 01:45 #48555rahunGuest
Why using synthesiser hopping can reduce the number of TRX?
rahun6th August 2007 at 09:11 #48556pixGuest
rahun, yes, that’s weird !
actually, you can reduce the size of your “reuse cluster”… but not the number of TRX per cell. That has nothing to do with which frequency hopping you’re using. It has to do with the traffic offered only.7th August 2007 at 08:06 #48557vivekGuest
ITS NOT WIERD…..OK!!!!
For your kind information if u r running a site with 4-4-4 conf & u are not using any hopping then you need 12 carriers to run the site.
Else if u r using hopping then u will require only 3 carriers (per sector) for BCCH & the rest of the carriers can be made to run on hopping using the whole MA list with proper MAIO & HSN planning.
Now i think that this might hav made u clear….
I think that u r getting confused with TRX & carriers.7th August 2007 at 13:40 #48558pixGuest
yes, you confused TRX and carriers, then. You said “reduce the number of TRX required”.
you should have said “reduce the number of carriers required.”
… OK !!!7th August 2007 at 18:00 #48559CRISGuest
Hi Giri… Hope this helps
Two methods of implementing frequency hopping, both are slow frequency hopping techniques.
The frequency of the transmission only changes once every time a burst is transmitted.
Each timeslot on a given transceiver can transmit at a different frequency. . This is an efficient method for small sites.
Each transceiver stays at the same frequency and the data is switched to the appropriate transceiver. The number of hopping frequencies is limited to the number of transceivers8th August 2007 at 05:06 #48560vivekGuest
Its Ok Buddy…
Anyhow i think that i have made myself clear now..
thanks & bye…8th August 2007 at 07:13 #48561pixGuest
ok, no problem 🙂5th September 2007 at 19:39 #48562JohnnyGuest
I will like to comment on vivek .
reducing the number of TRX is the
thing that no CARRier will like
they will like 6/6/6 sites or more.
The only impact with more number of TRX with RF/Synthesizer hopping is that it will have impact on RF Loading.6th September 2007 at 05:04 #48563VivekGuest
I didn’t actually get what u wanna say..!!6th September 2007 at 10:40 #48564Navdeep SinghGuest
MIMO antenna techniques can achieved huge capacity gains without requiring extra bandwidth.how we can acheive most of the gain for fullfilment of diffrent types of hopping using mimo techniques?7th September 2007 at 05:29 #48565IrfanGuest
Hi CRIS still i am confuse between Synthesiser and Baseband Hopping.kindly explain in detail what is the basic difference between the two.