Chopped intermediate frequency wireless receiver

Details Chopped intermediate frequency wireless receiver Chopped intermediate frequency wireless receiver

2007-04-17

2007-04-17

Vo, Nguyen T. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S257000, C455S324000

Reexamination Certificate

active

10748425

ABSTRACT:
A chopped intermediate frequency (IF) wireless receiver is disclosed. The wireless receiver includes a local oscillator (LO), a first and a second mixers, an LO frequency control module, an IF filter, a digital down converter and a down conversion controller. The LO provides a local oscillating signal to the first and second mixers. The first and second mixers converts a received radio frequency signal to an in-phase IF signal and a quadrature IF signal, respectively. The LO frequency control module alternately down converts a channel frequency by changing an oscillation frequency of the LO. Coupled to the digital down converter, the down conversion controller adjusts a complex sine wave within the digital down converter while the in-phase IF signal and the quadrature IF signal are being down-converted by the digital down converter to a baseband signal.

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patent: 2006/0088136 (2006-04-01), Morie et al.

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