Is there any way we can improve energy efficient transmission in a cooperative cognitive radio network? what are the solutions of maximizing energy efficiency in the local sensing stage, result reporting stage and decision making stage of spectrum sensing cooperative cognitive radio networks?
energy-efficient and time-saving one-bit cooperative spectrum sensing scheme, which has two stages can be used to save energy and time. If the signal-to-noise ratio (SNR) is high or no primary user exists, only one stage of coarse spectrum sensing is needed, by which the sensing time and energy are saved. Otherwise, the second stage of fine spectrum sensing will be performed to increase the spectrum sensing accuracy. Furthermore, only one-bit decision is sent by each secondary user to minimize the overhead.
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