Patent ID: 7768448
Filing Date: 2010-08-03
Classification: F41G,G01S

Abstract:
1. 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 of returned EM pulses off a target into a respective plurality of digital signals; a digital summer configured to sum a plurality of digital channel signals to produce a digital sum signal; 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 memory; a memory controller that upon detection of a pulse stores a plurality of samples for each said individual channel in said memory; and an embedded processor configured to process the channels to (a) estimate a pulse width to provide a first scale factor, (b) select the time samples with the maximum and next highest amplitudes, (c) uses the pulse width to select an averaging logic or a curve fit logic, and (d) apply the selected curve fit logic using the first scale factor or the averaging logic to the maximum and next highest amplitudes to estimate a peak amplitude, and calculates a LOS to the target from the estimated peak amplitudes for the individual channels.