Patent ID: 7505693
Filing Date: 2009-03-17
Classification: H04B

Abstract:
1. Apparatus for generating an elongated pulse train with specified pulse lengths and inter-pulse spacings, comprising: a waveform modulator including a timing table containing the specified pulse lengths and inter-pulse spacings; a buffer operatively coupled to said timing table for automatically and sequentially outputting the start times and stop times of said pulses; said buffer being smaller in size than that required to buffer said timing table, said timing table being divided up into segments; a pulse generator coupled to said buffer for generating a pulse train having pulses with corresponding pulse-on and pulse-off times such that said pulse train is generated automatically, whereby the length of said pulse train is determined by the number of pulses specified in said timing table, means for sequentially reading out said timing table segments to said buffer after a prior segment has been read out to said pulse generator; a laser and laser modulator therefor; and, means for coupling the output of said pulse generator to said laser modulator, whereby said waveform modulator is operative to cause said laser to produce laser pulses corresponding to the pulse train generated by said pulse generator, said laser being utilized to countermeasure a missile having a seeker over an engagement period, and wherein the length of said pulse train is at least as long as said engagement period, whereby pulse repetition is avoided in the generating of laser pulses spanning said engagement period.