Telecommunications – Receiver or analog modulated signal frequency converter – Plural receivers
Reexamination Certificate
2008-10-09
2011-10-18
Nguyen, Lee (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Plural receivers
C455S192100, C375S344000
Reexamination Certificate
active
08041318
ABSTRACT:
A wireless receiver utilizes a single analog oscillator to down-convert multi-carrier signals in one or more receiver front-end paths. The received signals are digitized, and the different carrier signals received at each antenna are separated in digital domain by mixing the digitized signal from each antenna with a carrier/antenna separation digital oscillator to down-convert a desired carrier signal and low-pass filtering to remove unwanted carriers. A coarse frequency correction adjusts the analog oscillator, and fine frequency corrections adjust digital oscillators mixing with the separated signals. In one embodiment, the fine frequency correction is applied to the carrier/antenna separation digital oscillators in the separation function. In another embodiment, the fine frequency correction is applied to frequency adjustment digital oscillators mixing with the separated signals. The frequency corrections may be based on reference symbols in the received signals.
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Drugge Oskar
Ghasemzadeh Farshid
Wallén Anders
Coats & Bennett P.L.L.C.
Nguyen Lee
Telefonaktiebolaget LM Ericsson (publ)
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