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1. 发明申请

WO0024117A9 METHOD AND SYSTEM FOR DOWN-CONVERTING AN ELECTROMAGNETIC SIGNAL 审中-公开
标题翻译：用于下变频电磁信号的方法和系统
公开(公告)号：WO0024117A9
公开(公告)日：2002-11-07
申请号：PCT/US9924299
申请日：1999-10-20
申请人： PARKER VISION INC
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
IPC分类号： H03D3/00 , H03C1/62 , H03C7/00 , H03D7/00 , H03D7/12 , H03D9/00 , H04B1/26 , H04B1/30 , H04B7/12 , H04L27/00
CPC分类号： H04B7/12 , H03C1/62 , H03D7/00
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 having an aliasing rate. The EM signal is aliased according to the aliasing signal to down-convert the EM signal. The term aliasing, as used herein, refers to both down converting an EM signal by under-sampling the EM signal at an aliasing rate, and down-converting an EM signal 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 another embodiment, the EM signal is down-converted to a demodulated baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.
摘要翻译：这里描述了通过使EM信号进行混叠来降低电磁（EM）信号的转换的方法，系统和装置。简要地说，这样的方法，系统和装置通过接收具有混叠速率的EM信号和混叠信号来操作。 EM信号根据混叠信号进行混叠，以降低EM信号的转换。如本文所使用的，术语混叠是指通过以混叠速率对EM信号进行欠采样以及以混叠速率从EM信号传输能量来对EM信号进行下变频来对EM信号进行下变频。在一个实施例中，EM信号被下变频到中频（IF）信号。在另一实施例中，EM信号被下变频为解调的基带信息信号。在另一个实施例中，EM信号是频率调制（FM）信号，其被下变频成非FM信号，例如相位调制（PM）信号或幅度调制（AM）信号。

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