Abstract: A quantum receiver for decoding an optical signal includes a beamsplitter for interfering the optical signal with a local-oscillator field to generate a displaced field, and a single-photon detector for detecting the displaced field. The quantum receiver also includes a signal-processing circuit for determining, based on an electrical output of the single-photon detector, a measurement outcome. The signal-processing circuit also determines, based on the measurement outcome and a feed-forward machine-learning model, a next displacement. The quantum receiver also includes at least one modulator for modulating, based on the next displacement, one or both of the optical signal and the local-oscillator field. Like a Dolinar receiver, the quantum receiver implements adaptive measurements to reduce the error probability of the decoded symbol. The use of machine-learning reduces the latency of the signal-processing circuit, thereby increasing the number of measurements that may be performed for each received symbol.

Abstract: A quantum receiver for decoding an optical signal includes a beamsplitter for interfering the optical signal with a local-oscillator field to generate a displaced field, and a single-photon detector for detecting the displaced field. The quantum receiver also includes a signal-processing circuit for determining, based on an electrical output of the single-photon detector, a measurement outcome. The signal-processing circuit also determines, based on the measurement outcome and a feed-forward machine-learning model, a next displacement. The quantum receiver also includes at least one modulator for modulating, based on the next displacement, one or both of the optical signal and the local-oscillator field. Like a Dolinar receiver, the quantum receiver implements adaptive measurements to reduce the error probability of the decoded symbol. The use of machine-learning reduces the latency of the signal-processing circuit, thereby increasing the number of measurements that may be performed for each received symbol.

Abstract: A system for preventing vibrations occurring in a diesel engine during shut down. The system employs a combined starter/alternator apparatus to apply a positive and/or negative torque to an engine to effect a smooth deceleration of the rotating parts of the engine. A system control function is provided wherein the engine speed from a vehicle engine speed sensor and the vehicle ignition key off signal are introduced to a control means to determine if the rate of engine speed deceleration is above or below a selected threshold level. If the rate of deceleration is above the selected threshold level, a command is generated by the control means to cause power to be absorbed from a rotating part of the engine to slow the engine. If the rate of engine deceleration is below the selected threshold level, a command is generated to add torque to the engine rotating part to prevent rapid deceleration.