Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How do I generate a broadband or wideband carrier?

  1. Feb 20, 2013 #1
    Generating a carrier on a single frequency is simple, just use an oscillator of a specific frequency and amplify.

    But how do I generate a carrier that is 100KHz wide, or even 100MHz wide? The obvious answer is more oscillators, but is there a better way?
     
  2. jcsd
  3. Feb 20, 2013 #2

    berkeman

    User Avatar

    Staff: Mentor

    Welcome to the PF.

    I don't think there is such a thing as a "carrier that is 100kHz wide". You can fill out a 100kHz channel with multiple carriers (like in OOFDM), or you can modulate a carrier, but a single carrier is generally at a single frequency.

    What is the context of your question? What are you studying?
     
  4. Feb 21, 2013 #3
    I understand this.

    My question is related to generation and independent control of multiple carriers spanning a given bandwidth (i.e. 100KHz or 100MHz.)

    I have been looking at some types of digital signals with large bandwidths (1/4/8MHz, etc). Is this bandwidth composed of independent carriers, or is it the result of interactions due to the modulation scheme employed???
     
  5. Feb 21, 2013 #4

    Redbelly98

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Thread locked pending moderation.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook