Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2004-03-12
2009-02-10
Appiah, Charles N (Department: 2617)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S332000, C455S425000, C375S140000
Reexamination Certificate
active
07489662
ABSTRACT:
A wireless terminal device having a simple configuration with at least two antennas, a single receiver, and a single reception level measuring section, which is capable of performing transmission and reception antenna diversity without a break of communication. The wireless terminal device, which communicates with a base station, comprises a reception system and a transmission system. The reception system includes a receiver, despreading section, a PN generator, and a BCH reception level measuring section. The BCH reception level measuring section measures a reception level of the broadcast channel. The transmission system includes a transmitter, a spreading section, and a PN generator. Either of two antennas is selected by a controller and an antenna switch. When a measured value of the broadcast channel via the selected antenna is equal to or less than a threshold value, the controller switches the working antenna to the other antenna, and obtains a measured value of a reception level of the other antenna during a transmission gap. Subsequently, when the first measured value is more than the second measured value, the controller switches to the antenna having a measured value higher than the other antenna to some extent.
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Japanese Office Action dated Aug. 30, 2005 (and English translation of relevant portion).
Appiah Charles N
Dickstein , Shapiro, LLP.
Gonzalez Amancio
NEC Corporation
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