Date Added: Apr 2010
In this paper the authors study linear codes for CDMA (Code Division Multiple Access). This is the standard for the 3rd Generation cellular communications systems. In this standard bent functions are used for constructing codes of constant amplitude. This application allows decreasing PAPR (Peak-to-Average Power Ratio) coefficient as much as possible. Such codes consist of vectors of values for bent functions. In this paper, the authors consider some definitions and facts about bent functions and also give some information about affine equivalent bent functions.