Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination
Reexamination Certificate
2011-07-12
2011-07-12
Nguyen, Duc M (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Noise or interference elimination
C455S304000, C455S317000, C455S323000
Reexamination Certificate
active
07979044
ABSTRACT:
Methods and systems for wireless communication are disclosed and may include generating first and second signals by band-limiting a received wireless signal in two frequency ranges utilizing programmable bandpass filters. The first and second signals may be undersampled utilizing a clock signal. A delay of the second signal may be coarse-tuned by delaying the undersampling clock signal and may be fine-tuned by delaying the undersampled second signal utilizing a programmable delay line. The delayed, undersampled second signal may be subtracted from the undersampled first signal. A center frequency of the first range may be configured to a desired signal frequency, and a center frequency of the second range may be configured to a blocker signal frequency. The delay line may include an array of CMOS inverters, and may be fine-tuned utilizing programmable capacitors. The bandpass filters may include one or more coplanar waveguide or microstrip bandpass filters.
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Rofougaran Ahmadreza
Rofougaran Maryam
Broadcom Corporation
McAndrews Held & Malloy Ltd.
Nguyen Duc M
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