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SINGLE RF RECEIVER CHAIN ARCHITECTURE FOR GPS, GALILEO AND GLONASS NAVIGATION SYSTEMS, AND OTHER CIRCUITS, SYSTEMS AND PROCESSES
SINGLE RF RECEIVER CHAIN ARCHITECTURE FOR GPS, GALILEO AND GLONASS NAVIGATION SYSTEMS, AND OTHER CIRCUITS, SYSTEMS AND PROCESSES
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机译:GPS,GALILEO和GLONASS导航系统以及其他电路,系统和过程的单射频接收器链架构
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摘要
A wireless receiver for multiple frequency bands reception includes a single receive radio frequency (RF) circuit (160, 170) having an RF bandpass substantially confined to encompass at least two non-overlapped such frequency bands at RF, a single in-phase and quadrature (approximately I, Q) pair of intermediate frequency (IF) sections (120I, 120Q) having an IF passband, and a mixer circuit (110) including an in-phase and quadrature (I,Q) pair of mixers (110I, 110Q) fed by said RF circuit (160, 170) and having a local oscillator (100) with in-phase and quadrature outputs coupled to said mixers (110I, 110Q) respectively, said mixer circuit (110) operable to inject and substantially overlap the at least two non-overlapped frequency bands with each other into the IQ IF sections (120I, 120Q) in the IF passband, the IF passband substantially confined to a bandwidth encompassing the thereby-overlapped frequency bands.
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