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— Cognitive radios (CR) are regarded as a viable solution to enabling flexible use of the frequency spectrum in future generations of wireless systems by taking advantage of spectrum holes, that is idle frequency bands not actively used by primary users (PU) for licensed transmissions. The actual utilization of a spectrum hole is determined by its duration(More)
In this paper we study distributed transmitter adaptation with limited feedback where a B-bit codebook known at both transmitter and receiver is used in the update process. Specifically , we discuss predictive vector quantization (PVQ) where the transmitter is updated incrementally using the codebook element which results in smallest distortion in sum(More)
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