I am attempting to characterise a phase shift in a channel so that I can compensate it at the receiver end using a phase equalizer. I need a method which produces a phase shift curve with more measurements than a Lissajous method produces. I was thinking possibly a phase shift oscillator may be the way to go with each stage producing a 45 degree shift, but I am unsure how to use this. I want to define the frequency and calculate the resulting shift. Also, I am not sure how to use an equalizing filter. I would probably use an all pass filter but how can I define where the curve goes?
Please help. I am mightily perplexed!!!
Steve