A Novel Algorithm for Joint Bit and Power Loading for OFDM Systems with Unknown Interference

TL;DR

This paper introduces a low complexity, non-iterative algorithm for joint bit and power loading in OFDM systems that maximizes throughput and minimizes power in fading environments with unknown interference, ensuring target BER.

Contribution

It presents a novel, closed-form, joint bit and power loading algorithm for OFDM systems that outperforms existing methods with lower computational complexity.

Findings

Superior performance compared to previous algorithms

Reduced computational effort

Effective in fading environments with unknown interference

Abstract

In this paper, a novel low complexity bit and power loading algorithm is formulated for orthogonal frequency division multiplexing (OFDM) systems operating in fading environments and in the presence of unknown interference. The proposed non-iterative algorithm jointly maximizes the throughput and minimizes the transmitted power, while guaranteeing a target bit error rate (BER) per subcarrier. Closed-form expressions are derived for the optimal bit and power distributions per subcarrier. The performance of the proposed algorithm is investigated through extensive simulations. A performance comparison with the algorithm in [1] shows the superiority of the proposed algorithm with reduced computational effort.