Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-10-18
2005-10-18
Chin, Stephen (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S130000, C370S335000, C380S268000
Reexamination Certificate
active
06956890
ABSTRACT:
The device can be used for generating, in the framework of a CDMA communications terminal, both Walsh-Hadamard channeling codes and OVSF channeling codes. The device comprises a code generator preferably configured for generating Walsh-Hadamard codes. When the device is used for generating Walsh-Hadamard codes, the corresponding index values, applied to an input of the device, are sent to the input of the code generator. Generation of OVSF codes envisages, instead, that the corresponding indices, sent to an input of the device, undergo mapping, which enables generation, starting from the OVSF code, of the corresponding index identifying a string of symbols that is identical within the Walsh-Hadamard code. In this way each string of OVSF code symbols is generated, so producing, by means of the code generator, the generation of the identical string of symbols included in the Walsh-Hadamard code.
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Avellone Giuseppe
Galluzzo Agostino
Lattuca Alessandro
Messina Ettore
Chin Stephen
Jorgenson Lisa K.
Seed IP Law Group PLLC
STMicroelectronics S.r.l.
Tarleton E. Russell
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