PHASE COMPENSATION FOR MULTI-STIMULUS CONTROLLER

摘要

Determining a compensated phase matrix for a multi-stimulus demodulation process is provided. A first drive line of a multi-stimulus sensing system is selected, and a stimulation signal is transmitted on the selected drive line. A channel gain resulting from the stimulation signal is measured from a received sense signal resulting from the stimulation signal. The measured channel gain is compared with a known channel gain to obtain an individual phase compensation for the selected drive line. A compensated phase matrix is formed of the individual phase compensation values for multiple drive lines.

主权项

1. A method comprising:
measuring phase characteristics of a plurality of transmit channels and sense channels of a multi-stimulus sensing system; calculating a phase delay to apply to composite sense signals received by a sense channel based on the measured phase characteristics; and calculating phase compensation values to apply to component signals of the composite sense signals received by the sense channel based on the phase characteristics and the phase delay.