Enhancing Performance of Magnetic Field Based Indoor Localization Using Magnetic Patterns from Multiple Smartphones

. 2020 May 9;20(9):2704. doi: 10.3390/s20092704

Algorithm 1 Make Magnetic Pattern Database.
Input: Location coordinate $L$ and magnetic data $M_{d}$ for three smartphones
Output: Binary Grid (BG)- magnetic pattern database
1:	for $i ⟵ 1 t o L$ do
2:	$c ⟵ a p p l y T w o S i d e d W i n d o w (i, M_{d}, k)$ // k represents the no. of subsequent and previous data points taken.
3:	$M_{d f} ⟵ r e m o v e O u t l i e r (c, ϵ, M_{d})$
4:	$M_{d n} ⟵ n o r m a l i z e D a t a (M_{d f})$
5:	end for
6:	$B G ⟵ m a k e B i n a r y G r i d (M_{d n}$