Method and apparatus for synchronizing a plurality of code divis

Details Method and apparatus for synchronizing a plurality of code divis Method and apparatus for synchronizing a plurality of code divis

1996-02-26

1997-11-18

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

370479, H04B 1707

Patent

active

056895267

ABSTRACT:
A method and apparatus at a transmitter (800) initializes (904) pseudonoise (PN) sequence generators (302, 306, 320) to predetermined initial states and thereafter generates (906) time-synchronized PN sequences. A spread spectrum signal is then transmitted (908) by utilizing the PN sequences to encode information. At a receiver (600, 700) a predetermined one of the PN sequences is acquired and tracked (1002), and one of the predetermined initial states is predicted and tracked (1004). A PN sequence generator (608, 714, 722, 730) of the receiver is adjusted (1006, 1014) to generate a selected PN sequence time-synchronized with the predetermined one, and a corresponding one of the PN sequences is despread (1008) by utilizing the selected PN sequence to decode the information.

REFERENCES:
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5166951 (1992-11-01), Schilling
patent: 5467367 (1995-11-01), Izumi et al.
patent: 5550811 (1996-08-01), Kaku et al.

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