Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Reexamination Certificate
2005-07-12
2005-07-12
Hong, Harry S. (Department: 2642)
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
C455S561000, C455S562100
Reexamination Certificate
active
06917786
ABSTRACT:
A radio receiving apparatus according to the present invention includes an array antenna having a plurality of antennas and an array receiving unit, and obtains a correction amount by using a known calibration signal. The radio receiving apparatus further includes a diversity receiving unit that receives the reception outputs of the plurality of antennas as inputs, carries out diversity processing, and outputs the results, a diversity reception quality monitoring unit for monitoring the reception quality of diversity reception, and an array reception quality monitoring unit for monitoring the reception quality of array antenna reception. If the reception quality of the diversity reception is equivalent to the reception quality of the array antenna reception, then the calibration of the array receiving unit is carried out while implementing the diversity reception so as to obtain the correction amounts of the amplitude fluctuation and the phase shift of the array receiving unit.
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Foley & Lardner LLP
Hong Harry S.
NEC Corporation
Nguyen Quynh H.
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