Patent ID: 7450470

Claim:
A process for producing signals for controlling a display to produce an image in an imaging system employing a plurality of transducers, the process comprising: producing first and second beam signals in response to delayed channel signals associated with respective transducers, said delayed channel signals representing real and imaginary components of time domain signals associated with respective transducers suitably delayed to focus a receive beam pattern of the transducers at least one beam angle, each of said first and second beam signals including separate real and imaginary component representations; combining said real and imaginary components of said first and second beam signals, to produce a composite beam signal, said composite beam signal including separate real and imaginary component representations; performing a trigonometric expansion on normalized values of said real and imaginary component representations of said composite beam signal to produce a plurality of expanded values; and producing illumination signals in response to said expanded values, for illuminating pixels on the display.