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Bandwidth

Viewing 4 posts - 1 through 4 (of 4 total)
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  • 7th March 2002 at 14:00 #34223
    Juan Marin
    Guest

    i have problems to calculate the bandwidth in a trasmission line, if somebody can tell me where i can get some information or the equations, its gonna be great
    thanks.

    9th March 2002 at 05:22 #34224
    Sudhir
    Guest

    Microwave Equations i can provide u.

    11th March 2002 at 12:02 #34225
    Sudhir
    Guest

    Ok, will be great to get the equations,thanks i will waiting.
    thanks

    17th March 2002 at 13:16 #34226
    Zoom
    Guest

    Bandwidth depends on the type of Modulation technique used.

    RF Bandwidth/bit= (1+alpha)/S
    where
    alpha is the filter coefficient
    S= symbol rate.

    for Eg: calulate the total RF bandwidth required by a DMR to transmit 16E1s(32.768Mbps) using QPSK modulation? assume alpha=0.3

    for QPSK S=2
    RF Bandwidth/Bit= (1+0.3)/2
    = 0.65Hz

    total bandwidth required for transmiting 32.768Mbps= 0.65*32.678
    = 21.3Mhz.

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