Wcdma

Discussion in 'General Electronics Chat' started by EngIntoHW, Sep 24, 2010.

  1. EngIntoHW

    Thread Starter Member

    Apr 24, 2010
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    Hi,

    I'm currently studying that topic and would like to ask numerous questions please.

    1. The modulation symbol rates refers to the data signal, before it's being spread?
    Otherwise, I don't understand how they reached the 960K and 15K figures.

    2. Each channel takes 38400 chips out of the (2^18 - 1) exist in a Gold code, and each of the 15 slots of this frame takes 38400/15 chips out of these 38400 chips?
    Did I get it right?

    3. I don't manage to understand that part.
    What is operator, in terms of channel, cell, cluster?
    What do they mean by three cell layers?

    Thank you.
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. EngIntoHW

    Thread Starter Member

    Apr 24, 2010
    128
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    Thank you very much Bertus.

    The PDF link is so wonderful.

    I'll be reading it and will come back with any questions that I might have (Hopefully it's ok). :)
     
  4. EngIntoHW

    Thread Starter Member

    Apr 24, 2010
    128
    0
    I'd like to ask a couple of questions please.

    1.
    In WDCMA, channels are separated by codes, and not by frequency, as each channel uses almost the whole RF band (3.84MHz out of 5MHz).
    The RF band of WDCMA channel is 5MHz, and each channel uses a bandwidth of 3.84MHz, right?

    2.
    If each channel has a unique code, does it mean that each cell phone needs to know both it's own code and the code of the channel it's using?
     
    Last edited: Sep 25, 2010
  5. bertus

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    Apr 5, 2008
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    Last edited: Sep 25, 2010
  6. EngIntoHW

    Thread Starter Member

    Apr 24, 2010
    128
    0
    Thank you very much Bertus.
     
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