Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-08-29
2006-08-29
Chin, Stephen (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S138000, C375S144000, C375S149000, C375S316000, C375S343000, C375S130000, C370S503000, C370S208000, C370S335000, C370S347000, C370S201000
Reexamination Certificate
active
07099371
ABSTRACT:
The present invention relates to an orthogonal spreading code in a code division multiple access (CDMA) mobile communication system, and more particularly, to a method for generating and allocating code or code pairs on the basis of an orthogonal code set, which is generated using orthogonal spreading codes, so as to reduce a peak-to-average power ratio and enlarge the length of an interference free window. In accordance with the invention, at least one orthogonal code set is generated based upon orthogonal spreading codes, one of the at least one orthogonal code set is determined as a representative orthogonal code set, and then the order is allocated according to rules determined based upon the representative orthogonal code set. The codes or code pairs are generated and allocated using the orthogonal spreading codes, so as to reduce a Peak-to-Average Power Ratio or extend the length of an interference free window (IFW).
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Chin Stephen
Fleshner & Kim LLP
LG Electronics Inc.
Pathak Sudhanshu C.
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