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专利名称：Method and System for Down-Converting an
Electromagnetic Signal, and Transforms forSame, and Aperture Relationships
发明人：David F. Sorrells,Michael J. Bultman,Robert
W. Cook,Richard C. Looke,Charley D.
Moses,Gregory S. Rawlins,Michael W. Rawlins
申请号：US14639310申请日：20150305
公开号：US20150312084A1公开日：20151029
专利附图：
摘要：Methods, systems, and apparatuses, and combinations and sub-combinationsthereof, for down-converting an electromagnetic (EM) signal are described herein. Brieflystated, in embodiments the invention operates by receiving an EM signal and recursivelyoperating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursiveoperations can be performed at a sub-harmonic rate of the carrier signal. The inventionaccumulates the results of the recursive operations and uses the accumulated results toform a down-converted signal. In an embodiment, the EM signal is down-converted to anintermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is afrequency modulated (FM) signal, which is down-converted to a non-FM signal, such as aphase modulated (PM) signal or an amplitude modulated (AM) signal.
申请人：PARKERVISION, INC.
地址：Jacksonville FL US
国籍：US
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