Multi-Carrier Digital Communications: Theory and Applications of Ofdm
Multi-Carrier Digital Communications: Theory and Applications of Ofdm
Achievable rates in cognitive radio channels
IEEE Transactions on Information Theory
Multiuser OFDM with adaptive subcarrier, bit, and power allocation
IEEE Journal on Selected Areas in Communications
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
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An analytic approach is presented for optimizing Spectrally Modulated, Spectrally Encoded (SMSE) waveforms using independent selection of intra-symbol (within a symbol) subcarrier power and modulation order. The SMSE framework is well-suited for cognition-based, software defined radio (SDR) applications. By exploiting statistical knowledge about the spectral and temporal behavior of interfering signals, the inherent SMSE framework flexibility is leveraged to substantially increase system throughput while limiting coexistent interference. Results for a coexistent scenario are provided in which the analytic optimization of the SMSE waveform is demonstrated in the presence of multiple Direct Sequence Spread Spectrum (DSSS) signals. The results reveal significant performance benefits that demonstrate the potential of the SMSE framework to dynamically adapt to changing environmental conditions-key functionality required for future SDR implementations.