Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy Efficient Distributed Worst Case Robust Power Allocation in
  Massive MIMO   This letter proposes an energy efficient distributed worst case robust power
allocation in massive multiple input multiple output (MIMO) system. We assume a
bounded channel state information (CSI) error and all channels lie in some
bounded uncertainty region. The problem is formulated as max-min one with
infinite constraint. At first, we solve the inner problem with triangle and
Cauchy-Schwarz inequality, then by fractional programming and successive convex
approximation (SCA) technique problem transfers to a convex optimization.
Finally closed form transmit power is obtained with distribution way.
Simulation results demonstrate proposed algorithm convergence and validate
robust power allocation. Also, the appropriate number of transmit antenna to
have maximum energy efficiency in simulation result is shown.

6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol