Abstract: A method for determining a mechanical angle to a radar target utilizing a multiple antenna radar altimeter is described. The method comprises receiving radar return signals at the multiple antennas, populating an ambiguity resolution matrix with the electrical phase angle computations, selecting a mechanical angle from the ambiguity resolution matrix that results in a least amount of variance from the electrical phase angle computations, and using at least one other variance calculation to determine a quality associated with the selected mechanical angle.

Abstract: A unit is described that is configured to control detonation of a munition such that the munition is detonated at a desired altitude. The unit includes a radar transmitter, a radar receiver that includes a radar range gate, and a sequencer. The sequencer is configured to receive a detonation altitude and set the range gate based on the received detonation altitude. The unit is also configured to output a detonation signal when radar return pulses received by the receiver aligned with gate delay pulses from the range gate.

Abstract: A digital burst mode laser control technique permits maintenance of a substantially constant laser output power for burst mode operation of a laser at lower duty cycles. The control technique may involve measurement of the output power level of a burst mode laser during a first burst frame, and comparison of the measured power level to a target power level. In addition, the control technique may further involve adjustment of a digital value based on the comparison, and conversion of the digital value to an analog value to control the output power level of the burst mode laser during a second burst frame. Hence, the control technique uses the output power level measured in a first burst frame to control the output power level of the burst mode laser during a subsequent burst frame.

Abstract: A PWM DAC including an emitter follower buffer circuit provides increased accuracy and reduced cost. The emitter follower buffer circuit that enables inexpensive implementation of the PWM DAC. A temperature compensation circuit adjusts the digital input value applied to the PWM to compensate for temperature-induced variation introduced by the emitter follower buffer circuit. The compensation circuit may incorporate circuitry that replicates the PWM DAC at least in part, and monitors the base-emitter voltage of a replicated emitter follower buffer to track temperature-induced variation in the PWM DAC. The compensation circuit generates an error value that can be used to compensate one or more PWM DACs within a particular system.

Abstract: Disclosed is a data message voter system for data messages from a plurality of loosely synchronized redundant processors. The data message voter system comprises a data receiver associated with each processor for capturing the data message from the processor. In turn, the voter only votes on those data messages captured by the receivers within an approximate skew time.