Ahmad Allahyari

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In cognitive radio networks, coexistence of primary users (licensed users) and secondary users needs a power control algorithm employed by secondary users to avoid harmful interference and guarantee acceptable minimum signal-to-interference-plus-noise ratio (SINR) to the primary users. In this paper we present a centralized cooperative power control(More)
Wireless sensor networks' nodes are divided to Hsensors and L-sensors. H-sensor nodes are more powerful than L-sensor nodes in term of processing and memory. Because of that H-sensors are considered as the cluster head and L-sensor as the cluster member. H-sensor is responsible for the security of this communication. Each node can communicate with neighbor(More)
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