基本信息:
- 专利标题： METHOD AND SYSTEM FOR DOWN-CONVERTING AN ELECTROMAGNETIC SIGNAL
- 专利标题（中）：方法和系统降频转换的电磁信号
- 申请号：EP99954996.7 申请日：1999-10-20
- 公开(公告)号：EP1125359A1 公开(公告)日：2001-08-22
- 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.
- 申请人： Parker Vision, Inc.
- 申请人地址： 8493 Baymeadows Way Jacksonville, FL 32256 US
- 专利权人： Parker Vision, Inc.
- 当前专利权人： Parker Vision, Inc.
- 当前专利权人地址： 8493 Baymeadows Way Jacksonville, FL 32256 US
- 代理机构： Cross, James Peter Archibald
- 优先权： US176022 19981021; US293095 19990416; US293342 19990416
- 国际公布： WO0024117 20000427
- 主分类号： H03D3/00
- IPC分类号： H03D3/00 ; 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.