Abstract: A novel adaptive algorithm for multiuser detection is proposed.The algorithm based on pilot channel (PCA) uses the information in pilot channel to compute directly the weight vector of the transversal filter. Compared with conventional adaptive algorithms and previously proposed blind algorithms, it does not require training sequences or channel estimation, and its computational complexity is O(N²). Analysis and simulations illustrate that PCA can converge to the Wiener solution globally, and reach the steady state rapidly. The steady state performance can be enhanced by increasing the transmitted power in pilot channel, but is worse than that of conventional recursive least-square algorithm in decision-directed mode (DD-RLS).

Key words: code division multiple access, multiuser detection, minimum mean square error