Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An ESPRIT-Based Approach for 2-D Localization of Incoherently
  Distributed Sources in Massive MIMO Systems   In this paper, an approach of estimating signal parameters via rotational
invariance technique (ESPRIT) is proposed for two-dimensional (2-D)
localization of incoherently distributed (ID) sources in large-scale/massive
multiple-input multiple-output (MIMO) systems. The traditional ESPRIT-based
methods are valid only for one-dimensional (1-D) localization of the ID
sources. By contrast, in the proposed approach the signal subspace is
constructed for estimating the nominal azimuth and elevation
direction-of-arrivals and the angular spreads. The proposed estimator enjoys
closed-form expressions and hence it bypasses the searching over the entire
feasible field. Therefore, it imposes significantly lower computational
complexity than the conventional 2-D estimation approaches. Our analysis shows
that the estimation performance of the proposed approach improves when the
large-scale/massive MIMO systems are employed. The approximate Cram\'{e}r-Rao
bound of the proposed estimator for the 2-D localization is also derived.
Numerical results demonstrate that albeit the proposed estimation method is
comparable with the traditional 2-D estimators in terms of performance, it
benefits from a remarkably lower computational complexity.

31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn