Multiplex communications – Duplex – Communication over free space
Reexamination Certificate
2011-03-22
2011-03-22
Qureshi, Afsar M. (Department: 2472)
Multiplex communications
Duplex
Communication over free space
C370S293000, C370S401000, C455S011100, C375S211000, C375S233000
Reexamination Certificate
active
07911985
ABSTRACT:
A repeater environment is provided operative to deploy a feedback cancellation loop that is adaptively coupled with an antenna array such that a selected metric can be derived by deploying a selected filter bank having an automatic gain control operative to process the signal on a bin by bin basis and the derived metric can be applied to the antenna array and feedback cancellation loop combination to improve signal integrity and amplification. In an illustrative implementation, an exemplary repeater environment comprises, a transmitter, a receiver, an equalized feedback cancellation loop circuitry comprising a filter bank, the cancellation loop being operatively coupled to an antenna array. In the illustrative implementation, the feedback cancellation loop can receive signals as input from a cooperating antenna array and provide output signals such as a feedback leakage signal to a cooperating antenna array.
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Gainey Kenneth M.
Otto James C.
Proctor, Jr. James A.
Gunderson Linda G.
Qualcomm Incorporated
Qureshi Afsar M.
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