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More recently, wireless sensor networks (WSN) have been widely recognized as a highly emerging technology. WSN is made up of a set of sensors, whose sole source of energy is the battery. As sensors are usually used in inaccessible areas, replacing or recharging the battery turns out to be almost impossible. It is actually, energy consumption which constitutes the major problem that causes too much...
Recently, wireless sensors networks (WSN) have become a subject of interest for many different applications. This type of network is composed of a large number of small nodes called sensors; are relatively limited in terms of energy, memory, computing power and throughput. These specific features require a specific routing protocol for WSN, among the routing solutions studied and proposed, the RPL...
The recent evolution of digital communication systems (voice, data and video) has been dramatic. The 3GPP Long Term Evolution (LTE) system is one of the latest developments in wireless telecommunications. This system deploy Orthogonal Frequency Division Multiplexing (OFDM) physical layer consisting of large number of mutually orthogonal sub carriers. This characteristic provides high robustness against...
This paper reviews an approach for the automatic orthogonal frequency division multiplexing (OFDM)signals classification for the cognitive radio applied to the standard IEEE 802.11 (the WiFi: Wireless Fidelity system) identification. Detected transmissions are classified as single-carrier or multi-carrier. In the case of multi-carrier transmission, different parameters may be used to ensure the identification...
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