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In cognitive radios, in-band spectrum sensing is essential for the protection of legacy spectrum users, enabling secondary users to vacate channels immediately upon detection of primary users. For in-band sensing, it is important to meet detectability requirements, such as the maximum allowed detection latency and the probability of misdetection and false alarm. In this paper, we propose key techniques...
In cognitive radio system, different primary signals have different protection requirements and operating parameters. So, classification of primary signals at secondary user receiver is needed to achieve these requirements of protection and support scalability. Scalability means changing operating parameters according to the current conditions which one of them is the primary signal that occupies...
Utilization problem of the limited spectrum is the one of the most important issues in wireless communication systems. Cognitive radio technique which is finding and utilizing frequency holes is also one of those techniques. Specially, the spectrum sensing technique to detect the primary user signal is a core technology in cognitive radio area. In this paper, we propose the spectrum sensing algorithm...
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