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专利名称：Chirp communication system发明人：Albert R. Martin申请号：US05/520060申请日：19741101公开号：US04037159A公开日：19770719
摘要：A communication system that is difficult to jam has a transmitter transmittingsuccessive chirp signals, which start at different initial frequencies and all have the samefrequency - time slope. At the transmitter successive selections are made from amongthe different available chirp signal frequencies in accordance with a predeterminedpseudorandom program that is known at the receiving station. The receiver has a chirpmatched filter capable of receiving all of the different chirps but, being a distributedfilter, it delays the different received chirps by differing amounts depending upon theinitial frequency of each chirp. The output of the chirp filter is envelope-detected, and theresulting pulse signal is passed through a time gate that is gated on at a time that isselected in accordance with the predetermined program. The system has advantages foranti-jam communications, multiple-access communications, frequency diversity radio, andcoding using multiple frequencies, as examples. The chirp matched filter is conveniently asurface wave device.
申请人：HARRIS CORPORATION
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