Distributed and Collaborative Beamforming in Wireless Sensor Networks: Classifications, Trends, and Research Directions

2017 ◽  
Vol 19 (4) ◽  
pp. 2092-2116 ◽  
Author(s):  
Suhanya Jayaprakasam ◽  
Sharul Kamal Abdul Rahim ◽  
Chee Yen Leow
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Wireless Sensor ◽  
Research Directions ◽  
Collaborative Beamforming

Near field improvements of stochastic collaborative beamforming in wireless sensor networks

2020 ◽  
Author(s):  
Enrique A. Navarro-Camba ◽  
Jaume Segura-García ◽  
Santiago Felici-Castell ◽  
Enrique Navarro-Modesto ◽  
Miguel García-Pineda ◽  
...  
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Near Field ◽  
Wireless Sensor ◽  
Collaborative Beamforming

scholarly journals Feasibility of a Stochastic Collaborative Beamforming for Long Range Communications in Wireless Sensor Networks

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 417 ◽  
Author(s):  
Enrique Navarro-Camba ◽  
Santiago Felici-Castell ◽  
Jaume Segura-García ◽  
Miguel García-Pineda ◽  
Juan Pérez-Solano
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Long Range ◽  
Ieee 802.15.4 ◽  
Base Station ◽  
Low Earth Orbit ◽  
Wireless Sensor ◽  
New Technique ◽  
Collaborative Beamforming ◽  
A New Technique

Wireless Sensor Networks (WSNs) is a group of spatially dispersed autonomous sensor devices, named motes. These motes have a microcontroller, sensors, are powered by AA or AAA batteries, and mainly have the ability to communicate using the IEEE 802.15.4 standard. The motes communicate between them inside the WSN exchanging packets using a multi-hop routing. They use a very low amount of power (below 100 mW). This limits the maximum communication distance between motes within the WSN. Usually, one mote acts as a gateway to other networks and this mote is also called sink or simply Base Station (BS), and the data collected by the sensors of each mote are sent to this mote. The maximum distance between the BS and the nearest mote is below 100 m because of the power limitations of the motes. If the WSN-BS distance is above this boundary, the communication will surely fail. We propose a new technique in order to achieve a long range communication from the WSN, for instance to communicate to a Low Earth Orbit (LEO) satellite. Many proposals in the literature based on Collaborative Beamforming (CB), also known as Distributed or Cooperative Beamforming, for these long range communications are found, however the synchronization of clocks is an almost impossible task given the simplicity and cheapness of the architecture of the motes. To overcome this problem, we propose a new technique, named Stochastic Collaborative Beamforming (SCB), in which we take advantage of the synchronization errors of the clocks. In SCB, it is possible to obtain the adequate time delay that permits the interference or sufficient gain in the direction of the receiver. This gain is obtained from interfering independent signals coming from each mote of the WSN, using a repetition scheme. Although it does not get all the nominal gain that could be obtained in case of a perfect synchronization, it does get a sufficient gain to reach the BS with limited power consumption.

Stochastic Collaborative Beamforming in Wireless Sensor Networks

2018 ◽  
Author(s):  
Enrique A. Navarro-Camba ◽  
Santiago Felici-Castell ◽  
Juan J. Pérez-Solano ◽  
Jaume Segura-Garcia ◽  
Miguel García-Pineda ◽  
...  
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Wireless Sensor ◽  
Collaborative Beamforming
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