Filter Bank Multi-Carrier Spread Spectrum with Biorthogonal Signaling for High Speed Data Transmission Through HF Skywave Channels

Filter bank multi carrier spread spectrum (FB-MC-SS)has proven to be a robust and reliable waveform choice for communication over high frequency (HF)skywave links. In this paper, we study the use of biorthogonal signaling in order to improve on the spectral efficiency of FB-MC-SS. We develop a design strategy that improves on the spectral efficiency of FB-MC-SS while maintaining its low peak-to-average power ratio (PAPR). Moreover, our simulation and experimental results over an HF link reveals that biorthogonal signaling can improve the data rate by a factor of four to six times at a cost of only 4 to 5 dB loss in performance.