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专利名称：METHOD AND SYSTEM FOR DOWN-CONVERTING AN ELECTROMAGNETICSIGNAL
发明人：SORRELLS, David, F.,BULTMAN, Michael,
J.,COOK, Robert, W.,LOOKE, Richard,
C.,MOSES, Charley, D., Jr.,RAWLINS, Gregory,S.,RAWLINS, Michael, W.
申请号：EP99954996.7申请日：19991020公开号：EP1125359B1公开日：20040421
摘要：Methods, systems, and apparatuses for down-converting an electromagnetic(EM) signal by aliasing the EM signal are described herein. Briefly stated, such methods,systems, and apparatuses operate by receiving an EM signal and an aliasing signal havingan aliasing rate. The EM signal is aliased according to the aliasing signal to down-convertthe EM signal. The term aliasing, as used herein, refers to both down converting an EMsignal by under-sampling the EM signal at an aliasing rate, and down-converting an EMsignal by transferring energy from the EM signal at the aliasing rate. In an embodiment,the EM signal is down-converted to an intermediate frequency (IF) signal. In anotherembodiment, the EM signal is down-converted to a demodulated baseband informationsignal. In another embodiment, the EM signal is a frequency modulated (FM) signal, whichis down-converted to a non-FM signal, such as a phase modulated (PM) signal or anamplitude modulated (AM) signal.
申请人：PARKER VISION INC
地址：US
国籍：US
代理机构：Cross, James Peter Archibald
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