Phil Karn (@KA9Q)
Here's why the amplitude channel needs wider bandwidth. Consider frequency modulation (FM); except at very low modulation indices (rates of phase change) it has...
This means the phase and amplitude channels must have closely matched delays. The amplitude channel should also have a significantly larger bandwidth than the actual...
I don't have the time to dig into this in detail right now, but there's nothing inherently bad with polar modulation. The two channels (phase and envelope) do have...
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