Multiuser detection in DS-CDMA systems based on a lattice code decoder

Usually, multiple access interference in DS-CDMA systems represents the capacity limiting factor. In this paper, we propose a multiuser detection algorithm based on a lattice code decoder that offers moderate computational complexity. The bit error rate converges asymptotically to the maximum-likelihood curve for large signal-to-noise ratios. Numerical results verify the performance in comparison to conventional detection schemes.