Iterativewater filling based on SLNR with 1-shot 1-bit feedback

The paper proposes a subcarrier power allocation method for downlink OFDMA systems. The proposed method utilizes an iterative water-filling (IWF) algorithm with signal-to-leakage-plus-noise ratio (SLNR) rather than conventional signal-to-interference-plus-noise ratio (SINR), which enables us to considerably reduce the overhead. Computer simulation results show that the proposed IWF based on SLNR with 1-shot 1-bit feedback per subcarrier can achieve very close sum-rate performance to the conventional IWF based on SINR, while only replacing SINR to SLNR in the IWF algorithm results in poor performance.