Abstract: A distance determining system for use in a movable device. The system comprises circuitry for capturing an image of an object external from the movable device. The system also comprises circuitry, responsive to the image, for determining an angle between a direction of movement of the movable device and the object. Lastly, the system also comprises circuitry for determining a distance to the object in response to at least the angle.

Abstract: Systems and methods for determining coefficients of an FIR filter are disclosed. The FIR filter coefficients are computed by determining a sine of an input value and an inverse of the input value. The sine of the input signal and the inverse of the input signal are multiplied together to form a sinc value of the input value. The sinc value is employed to determine the coefficient. The system and method can be repeated to compute any number of FIR filter coefficients in real-time. The sine of the input signal is computed utilizing a memory lookup table. The memory lookup table includes pairs of uniformly distributed values for the sine and cosine functions in the range of 0 to ?. The inverse of the input value is computed using an inverse memory lookup table, a most significant digit and a remainder. The coefficient is then computed from a product of the sine of the input signal and the inverse of the input signal.