Tof wraparound mitigation and eme reduction

A method to mitigate electromagnetic emissions in a time-of-flight system, the method comprising:

• extending a pulse interval of the time-of-flight system from a first pulse interval to a second pulse interval to include a predetermined blanking time;
• extending the second pulse interval of the time-of-flight system to a third pulse interval to include a dynamic blanking time, wherein the dynamic blanking time is increased by an offset at each successive pulse, wherein, in response to the dynamic blanking time reaching a predetermined dynamic blanking time, the dynamic blanking time is reset, and wherein the dynamic blanking time is initially set to zero;
• employing a spread spectrum frequency modulation to a clock signal used for timing of pulses at each pulse interval;
• processing events by the time-of-flight system within an active window to measure a time interval between a transmission of a pulse and receipt of a reflected pulse from an object by the time-of-flight system, a duration of the active window equal to a duration of the first pulse interval;
• and
• ignoring events within an inactive window, a duration of the inactive window corresponding to a duration of the third pulse interval minus the duration of the active window.

A time-of-flight system, comprising:

• a non-transitory memory storage comprising instructions;
• and
• a processor in communication with the non-transitory memory storage, wherein the instructions, when executed by the processor, cause the time-of-flight system to:
• extend a pulse interval of the time-of-flight system from a first pulse interval to a second pulse interval to include a predetermined blanking time,
• extend the second pulse interval of the time-of-flight system to a third pulse interval to include a dynamic blanking time, wherein the dynamic blanking time is increased by an offset at each successive pulse, wherein, in response to the dynamic blanking time reaching a predetermined dynamic blanking time, the dynamic blanking time is reset, and wherein the dynamic blanking time is initially set to zero,
• employ a spread spectrum frequency modulation to a clock signal used for timing of pulses at each pulse interval, and
• process events by the time-of-flight system within an active window to measure a time interval between a transmission of a pulse and receipt of a reflected pulse from an object by the time-of-flight system, a duration of the active window equal to a duration of the first pulse interval, wherein events within an inactive window are ignored, a duration of the inactive window corresponding to a duration of the third pulse interval minus the duration of the active window.