Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1995-08-30
1998-10-27
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455 86, 455304, 329306, 375329, H04B 130
Patent
active
058289550
ABSTRACT:
A low cost, high performance near direct conversion FM receiver having a single local oscillator is configured to equalize in-phase and quadrature-phase IF signals. The receiver includes a downconverter and a processor. The downconverter receives an RF signal and downconverts the RF signal to an in-phase IF signal (IF.sub.I) and a quadrature-phase IF signal (IF.sub.Q). The processor digitizes IF.sub.I and IF.sub.Q, corrects these signals so that they are substantially equal in magnitude and substantially 90.degree. out of phase, and then downconverts the IF signals to baseband signals (I, Q).
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Cleary Dennis Michael
Lipowski Joseph T.
Eisenzopf Reinhard J.
Nguyen Lee
Rockwell Semiconductor Systems Inc.
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