LOGIC DESIGN OF ORTHOGONAL VARIABLE SPREADING FACTOR CODE GENERATOR
Dong-Hahk Lee · Journal of Circuits Systems and Computers · 2005
This letter presents a new architecture for othogonal variable spreading factor (OVSF) code generator. The basic idea of the proposed method is to generate the code sequence using the outputs of binary counter and the binary representation of the code number. The proposed architecture can generate the code sequences as adding the only combinational logic circuits without an additional counter, if other code sequences are required according to SFs. Since the proposed generator is applied to W-CDMA modem that used different SFs simultaneously, it contributes to the reduction of the modem hardware complexity.