Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2002-03-26
2008-09-02
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S150000
Reexamination Certificate
active
07421010
ABSTRACT:
The invention provides a mobile communication terminal which uses both an extrapolation pilot signal and an interpolation pilot signal to assure a high precision in channel estimation and a high synchronous detection capacity without using TPC control or the like. The apparatus includes a first pilot signal despreading section for despreading a first pilot signal spread with a spread code different from a spread code of a communication channel, a second pilot signal despreading section for despreading a second pilot signal inserted in a data signal and spread with a spread code same as the spread code for the data signal, first and second complex calculation sections, and a correction amount output section for outputting a phase correction amount for phase correction using the results from the first and second complex calculation sections. The apparatus can be applied to a mobile communication terminal of, for example, the CDMA communication method.
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Fan Chieh M.
Fujitsu Limited
Katten Muchin & Rosenman LLP
Perilla Jason M.
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