Abstract: Embodiments of the present disclosure provide a positioning system and positioning method. A reverse calibrator for respectively calibrating relative coordinates of at least three ultrasound generators; a processor for generating a carrier signal, multiplying the carrier signal with a spread spectrum pseudo random code to obtain ranging signal, controlling each ultrasound generator to emit ranging signal, and extracting acoustic characteristic parameter of the ranging signals; a device being positioned for capturing ranging signals emitted by each generator, extracting acoustic characteristic parameter of each of the captured ranging signals; determining an ultrasonic delay time of each ultrasonic ranging signal; calculating relative coordinates of the device.

Abstract: Described herein are an ultrasonic positioning system integrated in an electronic device, and a method using the same. The ultrasonic positioning system comprises an ultrasound generator, two or more ultrasound receivers, and a control unit. Said ultrasound generator is configured to generate an ultrasound wave. Said two or more ultrasound receivers are configured to receive a reflected ultrasound wave produced by reflection of the ultrasound wave by an object in a field. Said control unit is configured to determine a position and/or a speed of the object using a frequency shift or a delay or both of the reflected ultrasound wave relative to the ultrasound wave. The ultrasonic positioning system provides gesture recognition and non-contact control of the device based on the ultrasonic positioning function of the device.