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Signal modeling of reflected laser 
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#1
Jun2713, 03:07 PM

P: 2

Hello all,
I am trying to model a received laser signal, x(t), reflected off a moving target. I am currently trying to model for both frequency change due to Doppler shifting as well as a timevarying phase shift, θ(t), due to the continuous change in distance from the target. My current model is as follows: x(t) = cos(2∏(f+f0(t))t + θ(t)), where f0(t) is the Doppler effect at time t and θ(t)=(distance at time t)/wavelength. I do not assume constant velocity so the f0(t) may change over time. I am not sure if this physical model is correct. Any comments or suggestions are welcome. Thank you. 


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