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Conventional spectrum sensing techniques using multiple antennas has two weak points to develop further in practice. The first point is the requirement of channel state information (CSI) to combine signal from each antenna. The second point is the assumption of exact values of the signal and noise variance to perform spectrum sensing. In practice, it is not easy and requires time to obtain CSI due...
This paper presents a new spectrum sensing scheme using an energy detector and multiple antennas. This scheme helps us finding the low level signals to realize a spectrum sharing in a primary and secondary system. The spectrum sensing by using multiple antennas has a problem that the channel state information of the primary signal is required for obtaining the diversity gain. However, the primary...
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