EURASIP Journal on Applied Signal Processing
Practical approaches to adaptive resource allocation in OFDM systems
EURASIP Journal on Wireless Communications and Networking - Multicarrier Systems
An extension to the ordered subcarrier selection algorithm (OSSA)
IEEE Transactions on Wireless Communications
Efficient MAC protocol for subcarrier-wise rate adaptation over WLAN
EURASIP Journal on Wireless Communications and Networking
The study of adaptive modulation algorithms in OFDM system
ICIC'13 Proceedings of the 9th international conference on Intelligent Computing Theories
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In this letter, a low-complexity and low-overhead adaptive bit-loading algorithm for wireless multicarrier schemes is proposed and analyzed. It is based on the diversity gain obtained through the ordering and selection of the more reliable subcarriers. Higher order modulations are used to compensate for the reduced subcarrier utilization. On the contrary to other bit-loading algorithms, it does not require nonuniform bit and power level allocation among subcarriers, thus drastically reducing the modem hardware complexity and making it attractive as a possible extension of existing high-speed wireless local-area network standards. System performance is analyzed in different configurations and conditions, including a realistic 5-GHz propagation scenario. Comparison with optimal adapted and unadapted solutions is also made. Finally, the effect of unideal feedback of the channel state information is analyzed showing the robustness and the low overhead required of the new scheme.