Distance sensing by iq domain differentiation of time of flight (tof) measurements

摘要: A system and method for identifying a position of moving object, regardless static objects present in the optical field an active infrared (IR) proximity detector, is provided. Moreover, modulated light emitting diode (LED) signal captured processed through I/Q demodulation. Specifically, reflections received at IR sensor are demodulated to generate in-phase (I) quadrature phase (Q) signals derivative obtained isolate motion. For example, domain differentiator or high pass filter employed calculate derivative, which actively remove effects all forms interference. Further, determined utilized reconstruct distance motion occurred.