Table 3.
Hybrid location systems comparison.
| Gu et al. [24] | McGuire et al. [25] | Catovic et al. [26] | Sahinoglu et al. [27] | Wang et al. [28] | Li et al. [29] | Our system | |
|---|---|---|---|---|---|---|---|
| Analytical techniques | AOA/TOA | RSS/TDOA | TOA/RSS and TDOA/RSS | TDOA/RSS | RSS | RSS | RSS |
| Outdoor or indoor | Outdoor | Outdoor | Outdoor | Outdoor | Both | Indoor | Both |
| Is it used in WSNs? | No | No | Yes | Yes | No | No | Yes |
| Mean accuracy (m) | 122 | 60 | 2-3.3 | 2.1 | 1.86 | 1.83 | 1.8 |
| Stages | 1 | 1 | 1 | 1 | 3 | 2 | 2 |
| Extra messages | No | No | Yes | Yes | No | No | No |
| Centralized or distributed | Centralized | Centralized | Both | Distributed | Centralized | Centralized | Centralized |
| Recursively update | No | No | No | No | Yes | No | Yes |