Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-12-11
2007-12-11
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S267000, C375S147000, C375S340000, C375S130000, C375S346000, C455S063300, C370S208000
Reexamination Certificate
active
10365608
ABSTRACT:
To perform interference suppression for a received signal more precisely. Block dividing section divides a data part of a received slot into several blocks. Channel estimator calculates a channel estimate vector for each block and stores it into channel estimate storage device. Channel estimate calculator for each block calculates a channel estimate vector for each block by using a channel estimate vector calculated with a known series symbol part for the (current) slot and a channel estimate vector for a known series symbol part for a previous slot stored in channel estimate storage device. Then, channel equalizer and de-spreader perform a calculation such as a channel equalizing calculation by using a channel estimate vector for each block at each block.
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Ishiguro Takayukii
Ishii Hiroyuki
Fan Chieh M.
NTT DoCoMo Inc.
Pathak Sudhanshu C.
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