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A novel energy detection scheme for improved dynamic spectrum access is proposed in this paper for cognitive radio applications. To maximize the access for secondary user (SU), the availability of inactive primary user (PU) is determined based on spectrum sensing and channel state estimation. A novel energy detection scheme has been introduced to collect the spectrum sensing data of the secondary...
Cooperative communication has been recently applied to LTE networks to enable coverage extension and enhance link reliability through distributed spatial diversity. The error performance of a cooperative diversity system having two cooperating mobile users (designated as source and relay) and a destination has been analyzed. In this paper, the relay cooperates with the source through the amplify and...
Cognitive radio techniques provide the capability to use or share the spectrum in an opportunistic manner. The major functions of cognitive radio include spectrum sensing, spectrum management, spectrum mobility and spectrum sharing. Spectrum sensing is the primary technique which is used by all the Cognitive radio users to harvest the advantage of Cognitive radio technique. In Spectrum sensing various...
Wireless sensor networks are being used widely for various security and surveillance applications. To be used in a more practical scenario, sensor networks support human decisions by preliminarily analyzing and interpreting data. The main design goal of a sensor network is to minimize power consumption. This paper proposes a two-level network to assist a human operator so that he/she is needed only...
Multiple-input and multiple-output (MIMO) is one of the key component in wireless standards. Wireless standards exploit MIMO to enhance user experience by improving the data rate and reliability of the link. Multiple-input and multiple-output (MIMO) systems formed by multiple transmit and receive antennas can improve performance and increase capacity of wireless sensor networks. In this Paper, the...
An ad-hoc network is the cooperative engagement of a collection of mobile nodes without the required intervention of any centralized access point or existing infrastructure. A number of routing protocols have already been proposed for ad-hoc networks. In most of these protocols, routing tables and considerable routing overheads are used to achieve routing. This paper proposes an approach to eliminate...
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