Abstract: In an optical detection system, a coded transmission scheme can be used to provide scene illumination. For example, a transmitter can include transmit elements that can be controlled individually or in groups to provide specified modulated (e.g., on-off-keyed) waveforms corresponding to specified transmit code sequences. Light reflected or scattered by an object can be detected by an optical receiver, such as a single-pixel detector. Contributions to the received optical signal corresponding to the respective transmit code sequences can be separated using a correlation-based technique, even when such contributions overlap in time. Regions of a field-of-regard illuminated by ones or groups of the transmit elements can be selected or adjusted, such as to provide controllable spatial (e.g., angular) selectivity of which portions of the field-of-regard are illuminated by particular transmit signals.

Abstract: In an optical detection system, a reference waveform can be used for automated analysis of a received waveform. The reference waveform can be adjusted (e.g., distorted) using information about one or more of a receive channel configuration or other aspects of the receive channel signal, facilitating a more effective comparison between a received impulse and the reference waveform. Such a comparison can be used in a time-to-digital conversion (TDC) technique, such as to provide delay values that can then be used to determine a distance between the illuminated target and an optical transceiver. Other techniques can be used to enhance range accuracy or resolution, such as using automated techniques for control of one or more of receive channel gain, summing or averaging (aggregation of received signals), or bias compensation (e.g., DC balancing).

Abstract: In an optical detection system, a coded transmission scheme can be used to provide scene illumination. For example, a transmitter can include transmit elements that can be controlled individually or in groups to provide specified modulated (e.g., on-off-keyed) waveforms corresponding to specified transmit code sequences. Light reflected or scattered by an object can be detected by an optical receiver, such as a single-pixel detector. Contributions to the received optical signal corresponding to the respective transmit code sequences can be separated using a correlation-based technique, even when such contributions overlap in time. Regions of a field-of-regard illuminated by ones or groups of the transmit elements can be selected or adjusted, such as to provide controllable spatial (e.g., angular) selectivity of which portions of the field-of-regard are illuminated by particular transmit signals.

Abstract: In an optical detection system, a reference waveform can be used for automated analysis of a received waveform. The reference waveform can be adjusted (e.g., distorted) using information about one or more of a receive channel configuration or other aspects of the receive channel signal facilitating a more effective comparison between a received impulse and the reference waveform. Such a comparison can be used in a time-to-digital conversion (TDC) technique, such as to provide delay values that can then be used to determine a distance between the illuminated target and an optical transceiver. Other techniques can be used to enhance range accuracy or resolution, such as using automated techniques for control of one or more of receive channel gain, summing or averaging (aggregation of received signals), or bias compensation (e.g., DC balancing).