OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
A spectrally modulated, spectrally encoded analytic framework for carrier interferometry signals
Proceedings of the 2006 international conference on Wireless communications and mobile computing
TDCS, OFDM, and MC-CDMA: a brief tutorial
IEEE Communications Magazine
Signal classification in fading channels using cyclic spectral analysis
EURASIP Journal on Wireless Communications and Networking
Design of Low PAPR Fundamental Modulation Waveform for Transform Domain Communication System
Wireless Personal Communications: An International Journal
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Interest in Cognitive Radio (CR) remains strong as the communications community strives to solve the spectrum congestion problem. In conventional CR implementations, interference to primary users is minimized using either overlay waveforms that exploit unused (white) spectrum holes or underlay waveforms that spread their power spectrum density over an ultra-wide bandwidth. In Part I, we proposed a novel hybrid overlay/underlay waveform that realizes benefits of both waveforms and demonstrated its performance in an AWGN channel. This was done by extending the original Spectrally Modulated Spectrally Encoded (SMSE) framework to enable soft decision CR implementations that exploit both unused (white) and underused (gray) spectral areas. In Part II, we analyze and evaluate performance of the proposed hybrid overlay/underlay waveform in frequency selective fading channels. A simulated performance analysis of overlay, underlay and hybrid overlay/ underlay waveforms in frequency selective fading channels is presented and benefits discussed.