Patent ID: 7765456
Filing Date: 2010-07-27
Classification: H04J

Abstract:
1. An apparatus for determining an Orthogonal Variable Spread Factor (OVSF) code, the apparatus comprising: a storage register for storing a bit of the OVSF code, wherein the OVSF code has a value k, wherein k is an integer ranging from 0 to SF−1, where SF is a spread factor for the given code k; a logic gate for performing a multiplication operation, the logic gate having a first input receiving the bit from the storage register, and a second input connected to receive a secondary code from a secondary code register, the secondary code register storing secondary codes for SF values associated with the value k, the secondary code comprising a binary value indicative of a change in OVSF code values of the OVSF code generated for particular SF values below the SF value of the code generated at an output of the logic gate, wherein the result of the multiplication operation comprises a portion of the OVSF code and is based upon the OVSF code values for SF values before the SF value for the result of the multiplication operation; and a shift register having an input receiving the output of the logic gate.