Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2005-10-11
2005-10-11
Ngo, Ricky (Department: 2663)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S370000, C370S342000, C370S509000, C375S145000, C375S358000
Reexamination Certificate
active
06954447
ABSTRACT:
A method and system for uplink (UL) synchronization of an uplink transmission from a plurality of wireless transmit/receive units (WTRUs) to a Node-B in a code division multiple access (CDMA) system. A Node-B receives a transmission including a UL synchronization (SYNC_UL) sequence from a WTRU. A sampler samples the transmission at a sampling rate which is higher than a chip rate. The samples are down-sampled and the SYNC_UL sequence is detected at a lower rate. A first significant path location of the detected SYNC_UL sequence is determined, and based on the first significant path location, a final significant path location is determined. The final significant path location is quantized and UpPCHPOSis transmitted to the WTRU to adjust a UL transmission timing.
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Bultan Aykut
Dennean Charles
Grieco Donald M.
Pan Jung-Lin
Hyun Soon D.
InterDigital Technology Corporation
Volpe and Koenig P.C.
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