Multiplex communications – Communication over free space – Combining or distributing information via code word channels...
Reexamination Certificate
2006-09-12
2006-09-12
Harper, Kevin C. (Department: 2616)
Multiplex communications
Communication over free space
Combining or distributing information via code word channels...
C375S145000, C375S149000
Reexamination Certificate
active
07106720
ABSTRACT:
A receiver employing CDMA techniques estimates background noise based on a periodically updated code. The transmitted signal includes a periodically updated code of a predetermined type and wherein the received signal has CW interference in addition to the transmitted signal. The decision circuit determines if a value representing the likelihood of detection of the code exceeds a predetermined threshold. In the case of a pilot signal not being detected within a predetermined time period which corresponds to code update period, the background noise estimator obtains a new background estimation.
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Jacques Alexander
Ozluturk Fatih M.
Harper Kevin C.
InterDigital Technology Corporation
Volpe and Koenig P.C.
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