Constrained Joint Bit and Power Allocation for Multicarrier Systems

TL;DR

This paper introduces a low complexity joint bit and power allocation algorithm for multicarrier systems that maximizes throughput, minimizes power, and guarantees BER constraints, outperforming existing methods with similar complexity.

Contribution

It presents a novel suboptimal allocation algorithm that approaches optimal performance with reduced computational complexity in fading multicarrier systems.

Findings

Algorithm outperforms previous methods in simulations.

Performance approaches that of optimal exhaustive search.

Achieves a balance between throughput and power efficiency.

Abstract

This paper proposes a novel low complexity joint bit and power suboptimal allocation algorithm for multicarrier systems operating in fading environments. The algorithm jointly maximizes the throughput and minimizes the transmitted power, while guaranteeing a target bit error rate (BER) per subcarrier and meeting a constraint on the total transmit power. Simulation results are described that illustrate the performance of the proposed scheme and demonstrate its superiority when compared to the algorithm in [4] with similar or reduced computational complexity. Furthermore, the results show that the performance of the proposed suboptimal algorithm approaches that of an optimal exhaustive search with significantly lower computational complexity.