Generation of OVSF Codes for WCDMA Spreading Applications

This article presents a simple yet practical MATLAB program designed for generating OVSF codes used in WCDMA spreading applications. Spreading technology is a signal processing technique widely employed in digital communications to enhance transmission quality and interference resistance. The program implements a recursive generation algorithm that constructs orthogonal code sequences by building upon smaller spreading factor codes. Key MATLAB functions utilized include matrix concatenation operations and recursive function calls to efficiently generate code trees with different spreading factors. Users can conveniently generate OVSF codes through this program, thereby facilitating effective implementation of spreading techniques. The implementation includes parameter customization options for specifying spreading factors and code indices. Additionally, we provide detailed usage instructions and practical examples to help users better understand and apply the program, including code validation methods to ensure orthogonality between generated sequences.