Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resource Allocation for Massive MIMO HetNets with Quantize-Forward
  Relaying   We investigate how massive MIMO impacts the uplink transmission design in a
heterogeneous network (HetNet) where multiple users communicate with a
macro-cell base station (MCBS) with the help of a small-cell BS (SCBS) with
zero-forcing (ZF) detection at each BS. We first analyze the quantize-forward
(QF) relaying scheme with joint decoding (JD) at the MCBS. To maximize the rate
region, we optimize the quantization of all user data streams at the SCBS by
developing a novel water-filling algorithm that is based on the Descartes' rule
of signs. Our result shows that as a user link to the SCBS becomes stronger
than that to the MCBS, the SCBS deploys finer quantization to that user data
stream. We further propose a new simplified scheme through Wyner-Ziv (WZ)
binning and time-division (TD) transmission at the SCBS, which allows not only
sequential but also separate decoding of each user message at the MCBS. For
this new QF-WZTD scheme, the optimal quantization parameters are identical to
that of the QF-JD scheme while the phase durations are conveniently optimized
as functions of the quantization parameters. Despite its simplicity, the
QF-WZTD scheme achieves the same rate performance of the QF-JD scheme, making
it an attractive option for future HetNets.

16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys