Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact Conditional and Unconditional Cram\`er-Rao Bounds for Near Field
  Localization   This paper considers the Cram\`er-Rao lower Bound (CRB) for the source
localization problem in the near field. More specifically, we use the exact
expression of the delay parameter for the CRB derivation and show how this
exact CRB can be significantly different from the one given in the literature
and based on an approximate time delay expression (usually considered in the
Fresnel region). This CRB derivation is then generalized by considering the
exact expression of the received power profile (i.e., variable gain case)
which, to our best knowledge, has been ignored in the literature. Finally, we
exploit the CRB expression to introduce the new concept of Near Field
Localization (NFL) region for a target localization performance associated to
the application at hand. We illustrate the usefulness of the proposed CRB
derivation and its developments as well as the NFL region concept through
numerical simulations in different scenarios.

36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an