A Least Square-Based Self-Adaptive Localization Method for Wireless Sensor Networks

Table 6

Localization error convergence graphs of different location method with (0, 0.2) noise.

Serial number of unknown node	Localization error convergence (iteration times)
	Maximum likelihood-based self-adaptive	Least square-based self-adaptive (proposed)
1	15	20
2	400	30
3	No convergence	100
4	400	60
5	15	5
6	4000	40
7	8000	60
8	No convergence	100
9	8000	90
10	400	15
11	15	90
12	15	100
13	15	No convergence
14	No convergence	100
15	15	60
16	4000	50
17	6000	60
18	6000	100
19	7000	100
20	400	40
21	No convergence	5
22	8000	20
23	15	100
24	5000	120
25	15	5