Non-Orthogonal Coding Techniques for Optical Sensing

摘要

A processing system includes a transmitter module, a receiver module, and a determination module. The transmitter module includes drives a first optical transmitter with a first optical coded signal based on a first code, and drives a second optical transmitter with a second optical coded signal based on a second code. The first code and the second code are non-orthogonal, and the first optical transmitter and the second optical transmitter transmit at overlapping times. The receiver module receives a resulting signal that includes effects corresponding to the first optical coded signal and the second optical coded signal. The determination module determines a first measurement between the first optical transmitter and the optical receiver, determines a second measurement between the second optical transmitter and the optical receiver, and determines positional information for an input object based on the first measurement and the second measurement.

主权项

1. A processing system for optical sensing, comprising:
a transmitter module comprising transmitter circuitry coupled a first optical transmitter and a second optical transmitter, the transmitter module configured to:
drive the first optical transmitter with a first optical coded signal based on a first code, anddrive the second optical transmitter with a second optical coded signal based on a second code,wherein the first code and the second code are non-orthogonal, andwherein the first optical transmitter and the second optical transmitter transmit at overlapping times; a receiver module coupled to an optical receiver and configured to receive a resulting signal comprising effects corresponding to the first optical coded signal and effects corresponding to the second optical coded signal; and a determination module configured to:
determine a first measurement between the first optical transmitter and the optical receiver based on the resulting signal and the first code,determine a second measurement between the second optical transmitter and the optical receiver based on the second code and the resulting signal, anddetermine a plurality of positional information for an input object based on the first measurement and the second measurement.