International forum of researchers Students and Academician
CDMA is the access technique adopted in the third generation wireless system. In this technique, all users share the same bandwidth simultaneously but with different codes. This sharing generates interferences that can reduce the overall throughput of the WCDMA network when using a weak code allocation algorithm. WCDMA uses OVSF codes as channelization codes for data spreading in both reverse link and forward link. In this paper, the authors will analyze the OVSF codes, their disadvantages, various techniques for improving the efficiency of these codes and the comparison of OVSF and NOVSF codes.