Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2005-02-01
2005-02-01
Hsu, Alpus H. (Department: 2665)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S342000, C375S142000, C375S150000, C375S367000
Reexamination Certificate
active
06850507
ABSTRACT:
A PN sequence acquisition device for a multicarrier CDMA mobile communication system including M (where M is a natural number) despreaders, each for multiplying BS generated PN sequences included in M carrier receiving signals by a local PN sequence of an nth (1≦n≦N, where n and N are natural numbers) time hypothesis in a predetermined integrating period; M correlators, each corresponding to a corresponding one of the M despreaders and each for calculating detection energies depending on correlations between the BS generated PN sequences of the corresponding one of M carrier receiving signals and the local PN sequence of the nth time hypothesis; a combiner for combining the detection energies corresponding to the local PN sequence of the nth time hypothesis for the M carrier receiving carriers; a controller for comparing the combined detection energy of the M carrier receiving signals, output from the combiner, with a threshold value; and N acquisition circuits including an nth local PN generator for providing the local PN sequence of the nth time hypothesis to the M despreaders and shifting a phase of the local PN sequence of the nth time hypothesis by a predetermined value under the control of the controller, whereby PN sequence acquisition is simultaneously performed on N time hypotheses.
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Dilworth & Barrese LLP
Hsu Alpus H.
Samsung Electronics Co,. Ltd.
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