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Hopping

Viewing 15 posts - 1 through 15 (of 19 total)
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  • #48551 Reply
    Irfan
    Guest

    Why we use hoppoing and what is its benefits.

    #48552 Reply
    giri
    Guest

    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 noise

    #48553 Reply
    vivek
    Guest

    Dear Irfan
    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.

    #48554 Reply
    giri
    Guest

    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..

    #48555 Reply
    rahun
    Guest

    Hi Vivek,
    Why using synthesiser hopping can reduce the number of TRX?

    br,
    rahun

    #48556 Reply
    pix
    Guest

    rahun, yes, that’s weird !

    Vivek,
    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.

    #48557 Reply
    vivek
    Guest

    Hi Mr.Pix
    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.

    #48558 Reply
    pix
    Guest

    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 !!!

    #48559 Reply
    CRIS
    Guest

    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.

    Synthesizer Hopping
    Each timeslot on a given transceiver can transmit at a different frequency. . This is an efficient method for small sites.

    Baseband Hopping
    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 transceivers

    #48560 Reply
    vivek
    Guest

    Hi Pix,

    Its Ok Buddy…
    Anyhow i think that i have made myself clear now..
    thanks & bye…

    #48561 Reply
    pix
    Guest

    ok, no problem 🙂

    #48562 Reply
    Johnny
    Guest

    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.

    #48563 Reply
    Vivek
    Guest

    Dear Johnny,

    I didn’t actually get what u wanna say..!!

    #48564 Reply
    Navdeep Singh
    Guest

    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?

    #48565 Reply
    Irfan
    Guest

    Hi CRIS still i am confuse between Synthesiser and Baseband Hopping.kindly explain in detail what is the basic difference between the two.

Viewing 15 posts - 1 through 15 (of 19 total)
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