Table 4 LS, WLS, and CWLS estimators based on TDOAs for locating an asynchronous target

Relations

The REFB-USRD-WLS(1) and the REFB-USRD-WLS(2) estimate are identical with the optimal weighting matrices ${\tilde{\mathbf{Q}}}_i^{*}={\tilde{\mathbf{Q}}}_{i,j}^{*}$

No. of references

1

1

2

2

1

Reference dependency

Yes

Yes

Yes

Yes

Yes

Literature

[19, 22, 32, 33, 36]

[21]

[20]

[20]

[4, 26]

Min. no. of anchors, x of length l

l + 2