Method for determining a time offset of a CDMA signal

Details Method for determining a time offset of a CDMA signal Method for determining a time offset of a CDMA signal

2007-03-20

2007-03-20

Ngo, Ricky Q. (Department: 2616)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S342000, C370S515000, C375S148000

Reexamination Certificate

active

10253059

ABSTRACT:
A method is described for determining a time offset of a CDMA signal incurred during transfer. For each of a plurality of time offset estimates, the received chip sequence is multiplied with a conjugate complex scrambling code that is shifted by a number of chips according to one of the time offset estimates; the chip sequence is despreaded based on a spreading code of at least one selected data channel to produce a symbol sequence, and an estimated amplification factor is determined by summation of an amount of the symbol sequence. The maximum of the amplification factors for the time offset estimates when a selected data channel is active, or the minimum of the amplification factors for the time offset estimates when the selected data channel is not active is then determined.

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