Posted by Green Xenon [Radium] on 09/23/07 23:12

On Sep 23, 2:36 pm, "Brian Gregory [UK]" <n...@bgdsv.co.uk> wrote:

> No.
>
> These are like special modified forms of AM.
>
> You can only use these to reduce
> bandwidth of an FM signal
> in the same way that you
> can use AM to reduce the
> bandwidth of an FM signal.
> It just won't be FM any more.


Would using Quadrature Frequency Modulation be of any help?

Quadrature Amplitude Modulation uses a combo of AM and Phase-Shift-Keying.

So QFM would use a combination of FM and PSK. Would this decrease the
bandwidth required for broadcasting FM luminance video signals?

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