Thread: Disadvantages of using AM for DSSS/FHSS Spread Spectrum?
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Old May 2nd 08, 10:03 PM posted to rec.radio.amateur.antenna
Cecil Moore[_2_] Cecil Moore[_2_] is offline
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Default Disadvantages of using AM for DSSS/FHSS Spread Spectrum?
Dave Platt wrote:
In article ,
Cecil Moore wrote:

FM usually occupies about twice the bandwidth of AM.
Thanks for adding "usually" to your original statement.
I was just pointing out that if the FM peak deviation
is equal to the maximum modulation frequency, then the
FM signal occupies the same bandwidth as AM.

I believe that you're mistaken on this point, Cecil.

Yep, you're right. A modulation index of about 0.6
yields approximately the same bandwidth for AM and FM.
--
73, Cecil http://www.w5dxp.com
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