Wireless sensors find many applications in, including but not limited to, wildlife habitat monitoring, defect monitoring in assembly lines, source localization, intrusion detection, etc. Many of these tasks require knowledge of the sensor locations. Often, we have information about only a few sensors (nodes) and the remaining locations have to be estimated. The process of estimating the node lo...

<span>Wireless <span>sensor network (WSN) can be used as a solution to find out the position of an object that cannot reached by global positioning system (GPS), for example objects in room known Indoor Positioning. One method indoor is fingerprinting. Inside there are two main work phases, namely training and positioning. The phase process collecting received signal strength indica...

Simultaneous wireless information and power transfer (SWIPT) is recently emerging as one of the vital solutions to prolong lifetime energy constrained sensor nodes. However, current works on SWIPT considered only immediate past-hop node's RF signal a source harvesting in multi-hop Internet things (IoT) networks. In case weak radio frequency (RF) signal, amount harvested does not support for con...

Synchronization in physical layer of wireless sensor networks is critical in restricting complexity of tag node and power consumption. Considering the master-to-tag communication (i.e., receiving signal from a master or anchor node by tag nodes), we propose a scheme on the basis of the principles of feedback control, to transfer the signal acquisition functionality from the tag receivers to the...

The goal of this report is to show how the multicarrier character of OFDM based wireless networks can be exploited when implementing multihopping. When it is not possible to establish a connection between a base station and a wireless terminal or when this connection is not of a satisfactory quality, multihopping can be used. In this report it is shown that with only a few multihopping nodes th...

We consider a two-way relay network, where two source nodes, S1 and S2, exchange information through a cluster of relay nodes. The relay nodes receive the sum signal from S1 and S2 in the first time slot. In the second time slot, each relay node multiplies its received signal by a complex coefficient and retransmits the signal to the two source nodes, which leads to a distributed two-way beamfo...

Current research proposes the Scheduling Based Energy Efficient Mobile Node Communication in Wireless Sensor Networks Unmanned Aerial Vehicle. In this work, hybrid network consists of two types of nodes one is static nodes and other are moving nodes. We will consider these mobile nodes as mobile sink. Each static sensor has fixed or low energy. They have limited memory buffer. According the siz...

ad hoc networks are multi-hop wireless networks without a pre-installed infrastructure. such networks are widely used in military applications and in emergency situations as they permit the establishment of a communication network at very short notice with a very low cost. video is very sensitive for packet loss and wireless ad-hoc networks are error prone due to node mobility and weak links. h...

wireless sensor networks, due to the characteristics of sensors such as wireless communication channels, the lack of infrastructure and targeted threats, are very vulnerable to the various attacks. routing attacks on the networks, where a malicious node from sending data to the base station is perceived. in this article, a method that can be used to transfer the data securely to prevent attacks...