From: Reference-free time-based localization for an asynchronous target
 | REFF-USR-WLS | REFB-USR-WLS | REFF-USRD-WLS | REFB-USRD-WLS(1) | REFB-USRD-WLS(2) |
---|---|---|---|---|---|
Relations | Â | The REFB-USR-WLS and the REFB-USRD-WLS(2) estimate are identical They are all identical with optimal weighting matrices | |||
No. of references | 0 | 2 | 0 | 1 | 2 |
Reference dependency | No | Yes, with Qi,j | No | Yes, with Q i | Yes, with Qi,j |
 |  | No, with |  | No, with | No, with |
Literature | Proposed | Â | Proposed | Â | Â |
Min. no. of anchors, x of length l | Â | Â | l+2 | Â | Â |