RFID Indoor Positioning Based on AP Clustering and Improved Particle Swarm Algorithm

Algorithm 1

AP clustering algorithm: tag RSSI value clustering.

Input: Input similarity matrix S,damping factor ;

Output: f clustering centers and category members;

1: Set parameter p value;

2: Initialize ;

3: while (maxits500 or convits50) do

4: Calculation of A(i, k) and R(i, k);

5: ifR(k, k)+A(k, k)then

6:  Select k points as clustering centers;

7: end if

8: Iterative update A(i, k) and R(i, k);

9: maxits=maxits+1;

10: convits=convits+1;

11: end while

12: Get f cluster centers and category members