Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2008-01-01
2008-01-01
Vo, Don N. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S145000
Reexamination Certificate
active
07315566
ABSTRACT:
A mobile communication system1according to the present invention comprises base station30and mobile station10. The base station30sends a pilot symbol sequence known to the mobile station10, to the mobile station10, using a plurality of carriers for downward channels, and performs communication with the mobile station10while multiplying the channels by frequencywise same scrambling codes every symbol period. The mobile station10is provided with a peak detector17for calculating cross correlation allowing for a phase difference of the scrambling codes, between frequencywise pilot symbol sequences received from the base station30, thereby detecting a radio frame boundary.
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Atarashi Hiroyuki
Sawahashi Mamoru
Tanno Motohiro
NTT Docomo Inc.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Vo Don N.
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