MIMO-OFDM systems with multi-user interference

Abstract

In this paper we consider downlink transmission in a multiuser environment, where each base station transmits multiple data streams to its corresponding mobiles using Multiple Input Multiple Output (MIMO) OFDM. Using distributed schemes, we find the optimal transmit and receive weight vectors, to maximize total data rate for each user. We consider two scenarios, where in one the total power per user and in the other total power per subcarrier is fixed. In each case, we propose iterative algorithms to maximize the allocated rate per user. We will discuss the convergence of our schemes and compare their performances with that of the previous works.