Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-03-28
2006-03-28
Chin, Stephen (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S142000, C375S152000, C375S343000, C370S335000, C370S342000, C714S755000
Reexamination Certificate
active
07020183
ABSTRACT:
In a code division multiple access signal receiving apparatus for demodulating transmit data by subjecting a receive signal to despread processing using a code sequence identical with a spreading-code sequence on a transmitting side, a cross-correlation detector calculates a cross-correlation value, on a per-symbol basis, between a spreading-code sequence for spread-spectrum modulating local-station-addressed transmit data and a spreading-code sequence for spread-spectrum modulating other-station-addressed transmit data; a discriminator discriminates whether the calculated cross-correlation value has exceeded a threshold value; and a switch halts input, to a decoder, of a portion of the receive signal that corresponds to the full interval or partial interval of a symbol where the cross-correlation value exceeds the threshold value.
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Chin Stephen
Fujitsu Limited
Katten Muchin & Rosenman LLP
Wang Ted M.
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