NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
An optimal orthogonal overlay for a cyclostationary legacy signal
IEEE Transactions on Communications
A survey of spectrum sensing algorithms for cognitive radio applications
IEEE Communications Surveys & Tutorials
Resource allocation for spectrum underlay in cognitive radio networks
IEEE Transactions on Wireless Communications - Part 2
Joint transmitter and receiver optimization in additive cyclostationary noise
IEEE Transactions on Information Theory
Limits on communications in a cognitive radio channel
IEEE Communications Magazine
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
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In this paper, the authors propose a framework that allows an overlay new system to operate simultaneously with a legacy existing system. By jointly optimizing the transmitter and the receiver filters of the overlay system, the sum of the mean-squared error MSE of the new system plus the excess MSE in the existing system due to the introduction of the overlay system is minimized. The effects of varying key parameters such as the overlay transmitter power and the amount of overlap between the legacy and the overlay systems are investigated. Furthermore, the sensitivity of the system to accuracy of signal-to-noise ratio SNR estimate and the channel estimate is also examined.