Konstantin Kropivny (@kman)
Nice transition between phases! I also slightly change amplitude, to confirm their synchronization, as many people mentioned here. Receiver should demodulate such...
It's important to know, how the calculated phase is applied on every sample. In my case, AD9959 DDS chip has two modes, configured in registers:1. RF phase is not...
I spent a lot of time on a correction algorithm for atan2(Xh(t),X(t)) at X(t) close to 0 (or under a noise), and failed so far. It may sound good enough, but artefacts...
Polar modulation works for me, you can check the first two Youtube videos at http://www.synthezator.com/ . Most problems are with the phase determination when both...
Thank you all for the comprehensive answers. My question is much simpler and very practical: if phase shift between I and Q channels is always decreasing, then the...
For SSB (Single Side Band) modulation I use Prosch’s [1] IIR
all-pass filters as per below:For a single Cosine tone, with a frequency from the range
above, the...
does it mean that if in SDR radio I sample output of quadrature detector with 16bit ADC at 48kHz, then downsample and average to 12kHz, I increase sensitivity in...
Probably tone filters with envelope detectors, on the intermediate frequency, would work in this case.
Random hopping is happening with the constant rate, which is 20 kHz in my example.I don't have sampling rate for now, I consider the analog RF signal, as generated...
Yes, it reminds me kFSK, where k is the number of frequencies, 16 in my example F0 + [500:300:5000] . There is a lot of theory about 16FSK, but no information on...
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