Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-05-10
2005-05-10
Bocure, Tesfaldet (Department: 2631)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S149000, C375S150000, C370S342000
Reexamination Certificate
active
06891882
ABSTRACT:
Decoding CFC codewords in the form of sums of QPSK-modulated spread symbols in a spread spectrum communications systems using comma-free codes with elements made of sums of QPSK-modulated secondary synchronization codes.
REFERENCES:
patent: 6226315 (2001-05-01), Sriram et al.
patent: 6363060 (2002-03-01), Sarkar
patent: 6504830 (2003-01-01), Ostberg et al.
patent: 6526091 (2003-02-01), Nystrom et al.
Sanat Kama et al., “Comparision of Intial Cell Search Algorithim for W-CDMA System Using Cyclic and Comma Free Codes,” 2002, IEEE, pp. 192-195.
Dabak Anand
Hosur Srinath
Bocure Tesfaldet
Brady W. James
Hoel Carlton H.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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