Achieving Fairness, Simplicity, and Near Optimal Performance in Rate Adaptation Algorithms for Wireless Multiuser OFDM Systems

In this paper, we introduce the rate adaptation problem in adaptive wireless multiuser OFDM systems and illustrate its optimal solution. Due to the high complexity of this solution, we illustrate a previously proposed two-step algorithm that was suggested to simplify the adaptation process. This algorithm is based on equal distribution of power on OFDM subcarriers. We then propose a new modification on the first step of this algorithm, which makes the second step unnecessary. Finally, an enhanced version of the newly proposed single step algorithm is suggested to reach a near optimal performance