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Jerry Stuckle wrote in
: That's useful. It ties in with things I have read about phase modulation synthesis. At risk of opening a wild (but fun) bit of off-topic, I wonder if given a reference carrier at precise fixed frequency, a phase modulation technique might allow advantages to signal transmission that FM lacks. Not really. All phase modulation does is integrate the modulating signal and use that to shift the phase of the carrier (which also requires a frequency change to effect the phase change). The resulting signal is exactly the same as if the carrier were directly frequency modulated. The only difference is how you got there. Ok. What made me wonder is that I read (in the context of phase modulation for musical audio synthesis) that true FM methods can cause a frequency drift that is avoided completely by using phase modulation. I wondered if that fact might (at some other cost) be useful in signal transmission at RF. |
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