Joint multipath combining and ICI rejection for multicode system

Multicode transmission is a promising technique for a high speed wireless data networks. However, it suffers from an inter-channel-interference when the multicode signal propagates through a multipath channel, although the transmitted subchannels are originally orthogonal. In this paper an MMSE receiver for multicode system is proposed. It combines multipath components and reduces ICI at the same time, which improves the system performance considerably, without the need of an explicit channel estimation.