Multiple input multiple output signal receiving apparatus...

Telecommunications – Receiver or analog modulated signal frequency converter – Plural receivers

Reexamination Certificate

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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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International Search Report and Written Opinion dated Sep. 12, 2008 cited in PCT/US07/67012.

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