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Unlimited Airwaves

Posted by Hemos on from the what-to-do-with-the-airwaves dept.

Dan Gillmor has an article concerning the notion of scarcity of the airwaves, which has long been a testament of faith at the FCC. Recent advances in technology may render that testament false.

2 of 233 comments (clear)

  1. Re:Described before? by dknj · · Score: 4, Informative

    I seemed to have answered my own question, the article i was refering to was the Ultra Wide Band. Additionally, this article seemed interesting.

    -dk

  2. Re:New? by Gordonjcp · · Score: 4, Informative
    The stereo system used on FM radio works like this. Your normal FM carrier has a mono signal (L+R), and modulated on a 38kHz subcarrier is the difference signal (L-R). The mono radio can hear only the L+R signal, the higher band L-R being filtered out. In a stereo decoder, the L-R signal is demodulated, and mixed with the L+R to give L only, which is then subtracted from L+R to give R only.


    It's sometimes called M/S (mid/side), so we can express it like this:

    M=L+R, S=L-R when transmitting.

    L=M+S, R=M-L

    Clear as mud, right?