Fading-resistant and MUI-free codes for CDMA systems

A new class of codes was proposed recently for perfect multi-user interference (MUI) suppression in Code Division Multiple Access (CDMA) systems. These so called Lagrange-Vandermonde (LV) codes o er deterministic MUI elimination without channel estimation, and convert frequency selective channels into at fading channels. In this work, we develop dual CDMA transceivers, naturally termed Vandermonde Lagrange (VL), with the precoder decoder roles interchanged, in order to improve system exibility in the code assignment. We also derive and test nonredundant and redundant techniques for combating the residual at fading.