Jammer Localization in Multihop Wireless Networks Based on Gravitational Search

Algorithm 2

GSA-based localization algorithm.

Input: the state and position of MHWN nodes

Output: the estimated jammer’s position

(1) Initialize number of iterations , number of particles

, acceleration, velocity and position of the particle,

gravity coefficient and time constant .;

(2) for    do

(3) Random select particles in the jammed area;

(4) Calculate the fitness function for each particle;

(5) Save the best value at this iteration and update the

global best value;

(6) Calculate the mass and normalized mass of the

particles;

(7) Calculate the resultant force in each dimension for

all the particles;

(8) Update the gravity coefficient and acceleration,

velocity, position of the particle.

(9) end for