Patent ID: 7289426
Filing Date: 2007-10-30
Classification: H04J

Abstract:
1. A method for parallel generating channelization codes, including Walsh-Hadamard (WH) channelization codes and Orthogonal Variable Spreading Factor (OVSF) channelization codes, said channelization codes being formed by a plurality of strings of antipodal digits, each having a length L and being identifiable by respective indices I formed by strings of binary digits, each having a length N equal to a logarithm in base two of the length L of said channelization codes, the antipodal digits of said channelization codes being able to assume values +1 and −1 and the binary digits of said indices I being able to assume values 0 and 1, said method comprising: determining the antipodal digits of said channelization codes according to the binary digits of the corresponding indices I by implementing the following: a) determining intermediate binary digits: where: b) encoding said intermediate binary digits with respective antipodal digits of said channelization codes according to said binary encoding digit X, said encoding being performed using a criterion according to which intermediate binary digits 0 and 1 are encoded, respectively, with antipodal digits −1 and +1 if the binary encoding digit X is equal to 1, whilst they are encoded with antipodal digits +1 and −1 if the binary encoding digit X is equal to 0.