Telecommunications – Receiver or analog modulated signal frequency converter – Plural receivers
Reexamination Certificate
2011-05-03
2011-05-03
Jackson, Blane J (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Plural receivers
C455S277200, C455S226100
Reexamination Certificate
active
07937052
ABSTRACT:
A multiple input multiple output signal receiving apparatus includes a first antenna configured to receive a first radio frequency (RF) signal, a second antenna configured to receive a second RF signal, a superheterodyne receiver, a direct conversion receiver, and an antenna switching module. The superheterodyne receiver is configured to convert one or both of the first and second RF signals into at least one first analog signal. The direct conversion receiver is configured to convert one or both of the first and second RF signals into at least one second analog signal. The antenna switching module couples the first and second antennas to the superheterodyne receiver and the direct conversion receiver, and is configured to selectively direct the first and second RF signals to the superheterodyne receiver and/or the direct conversion receiver, depending on an antenna switch control signal indicating a signal quality derived from the first and second analog signals.
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Banh An Tuyen
Su Yong
Xu Xinguang
Cisco Technology Inc.
Jackson Blane J
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