OVSF code system and methods for CDMA stations

Details OVSF code system and methods for CDMA stations OVSF code system and methods for CDMA stations

2007-07-03

2007-07-03

Hsu, Alpus H. (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S335000, C370S342000, C375S140000

Reexamination Certificate

active

10831254

ABSTRACT:
A code indexing system for a CDMA communication station that uses orthogonal variable spreading factor (OVSF) codes has a single number mapped to each code. The new code number itself not only provides the code signature, but it is also used for the OVSF code generation. In addition, the system provides easy and fast generation of the available code list without the help of look-up table. This capability improves the dynamic code assignment.

REFERENCES:
patent: 5442627 (1995-08-01), Viterbi et al.
patent: 5751761 (1998-05-01), Gilhousen
patent: 6009091 (1999-12-01), Stewart et al.
patent: 6091757 (2000-07-01), Cudak et al.
patent: 6163524 (2000-12-01), Mognusson et al.
patent: 6222875 (2001-04-01), Dahlman et al.
patent: 6233231 (2001-05-01), Felix et al.
patent: 6330291 (2001-12-01), Agrawal et al.
patent: 6400755 (2002-06-01), Harris et al.
patent: 6466142 (2002-10-01), Barbano
patent: 6483828 (2002-11-01), Balachandran et al.
patent: 6532250 (2003-03-01), Palenius et al.
patent: 6693952 (2004-02-01), Chuah et al.
patent: 6813258 (2004-11-01), Hans et al.
patent: 6813506 (2004-11-01), Song
patent: 6885691 (2005-04-01), Lyu
patent: 6956890 (2005-10-01), Lattuca et al.
patent: 6982946 (2006-01-01), Wiberg et al.
patent: 7012886 (2006-03-01), Meier et al.
patent: 2002/0018457 (2002-02-01), Choi et al.
patent: 99/03224 (1999-01-01), None
patent: 00/042723 (2000-07-01), None
patent: 01/056162 (2001-08-01), None
patent: 01/58070 (2001-08-01), None
F. Adachi et al., “Tree Structured Generation of Orthogonal Spreading Codes with Different Length for Foward Link of DS-CDMA Mobile Radio”, Electronics Letters, vol. 33, No. 1, Jan. 1997.
E.H. Dinan et al., “Spreading Codes for Direct Sequence CDMA and Wideband CDMA Cellular Networks”, IEEE Communication Magazine, Sep. 1998.
P. Godlewski et al., “Orthogonal Variable Rate Spreading Sequences With Improved Correlation Properties for Wireless CDMA Cellular Networks”, Vehicular Technology Conference, May 1999.
R.G. Cheng et al. “OVSF Code Channel Assignment for IMT-2000”, Vehicular Technology Conference, Spring 2000.
T. Minn et al., “Dynamic Assignment of Orthogonal Variable Spreading Factor Codes in W-CDMA”, IEEE Journal on Selected Areas in Communication, vol. 18, No. 8, Aug. 2000.
Lee J. S. , Generation of Walsh Functions as Binary Group Coeds, UMI Article Clearinghouse, Ann Arbor, US, pp. 58-61, Mar. 1970-03.

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