Abstract:
In this paper, we study the localization problem in large-scale underwater sensor networks. We
present a method to calculate the sensor node coordinate using single floating beacon node. In
underwater wireless sensor networks to determine the specific coordinate of the sensors that
collect data is essential. The collected data gives limited value into the actual origin. Trilateration
or multilateration techniques is used to determine the location of the sensors with respect to
more known beacon nodes and measure the distance between sensor and beacon using acoustic
signal(considered the roundtrip time).This method do not measure correct distance between
sensor and beacon . In this study, we determined the underwater distances between beacon and
sensor nodes using combined radio and acoustic signals, which has better immunity from
multipath fading. Cayley-Menger determinant is used to determine the coordinates of the nodes.
The simulations and field evaluations show a good estimation of the beacon node positions.
Computing coordinates of sensor nodes with negligible errors.
Description:
This thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Computer Science and Engineering of East West University, Dhaka, Bangladesh