James N5GUI wrote:
I am curious what got you to thinking about Doppler frequency tracking on the BPSK signals. Did you consider a specific approach on how? Had it occurred to you that it might have application beyond BPSK or AO-16?
I was thinking of a particular application, and a particular way of solving a particular problem. In particular (!), I was thinking of how I might make a very simple, generally idiot- proof way of receiving AO-16. No megabucks on a 736 and a computer, which is how I was doing it at school. The signal is BPSK. Use it, rather than the clunky open-loop tracking AMSAT usually uses. BPSK has a certain elegance, and I wanted a more elegant solution.
Of course such things have wider applications. I'm not completely stupid...
Along with this was the notion of a phased array antenna that would place its main lobe at the optimal angle for receiving satellites. The amount of time the satellites spend directly overhead is small, while signal levels at the horizon are low. Optimum is somewhere in between.
Laura Halliday VE7LDH Que les nuages soient notre Grid: CN89mg pied a terre... ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte _________________________________________________________________