Blind CDMA interference rejection in multipath channels

Abstract

The performance of conventional code division multiple access (CDMA) receivers is limited by multiple access interference (MAI) and near-far effects. The severity of the problem is increased in multipath channels. A RAKE receiver exploits multipath diversity but is unable to suppress interference. Adaptive receivers can exploit multipath and suppress MAI, however this approach requires a training sequence. This paper presents a new blind algorithm that is capable of optimally combining multipath while canceling MAI.