Patent ID: 7773027

Claim:
A digital line-of-sight (LOS) processor for detecting electromagnetic (EM) pulses reflected off a target from a source that emits the EM pulses at known pulse repetition intervals and computing a LOS to the target, comprising: a plurality of A/D converters configured to convert respective analog signals from a multi-channel detector into a plurality of digital signals on respective individual channels; a digital summer configured to sum a plurality of digital channel signals to produce a digital signal on a sum channel; at least one digital pulse detector configured to compare sample amplitudes of the digital signal on at least the sum channel to a detection threshold to detect pulses; a filter configured to remove pulses that occur at repetition rates greater than an octave above the repetition rate corresponding to the known pulse repetition interval; a memory; a memory controller that upon detection of a pulse by any one of the one or more pulse detectors stores a plurality of samples for each said individual channel in said memory; and a processor configured to process the sample amplitudes for the individual channels to calculate a LOS to a target.