Table 2 Results for sample filtering
From: A coherent data filtering method for large scale RF fingerprint Wi-Fi Positioning Systems
Grid# | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|
Before filteringa | 25 | 19 | 18 | 21 | 13 | 18 | 7 | 8 | 20 |
|g j  ‒ m j  | | 15 | 9 | 8 | 11 | 3 | 8 | 3 | 2 | 10 |
After filteringb | 11 | 10 | 9 | 15 | 9 | 9 | 5 | 6 | 15 |
|g j  ‒ m j  | | 1 | 0 | 1 | 5 | 1 | 1 | 5 | 4 | 5 |