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Homework Help: Bandwidth to send signal FSK question, question about terminology

  1. Sep 27, 2013 #1
    1. The problem statement, all variables and given/known data

    A binary encoded signal with a bit-rate of Rb = 112 kbps is now encoded using polar NRZ baseband encoding and then modulated using binary FSK with a carrier frequency spacing of 10 kHz. What is the bandwidth required to transmit this modulated signal?

    a.132 kHz
    b.224 kHz
    c.234 kHz
    d.112 kHz

    2. Relevant equations

    w = 2 ×Δfmax + 2rb

    3. The attempt at a solution

    Δf = 10kHz

    w = 2 ×Δfmax + 2rb

    w= 2 x 10 + 2 x 112= 244 kHz.

    I think my mistake is to do with Δf max freq. deviation.
    carrier frequency spacing of 10 kHz.

    Does this mean the distance between f0 - f1 = 10k, making Δf = 5k giving me 234 k
  2. jcsd
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