Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Throughput Analysis of Massive MIMO Uplink with Low-Resolution ADCs   We investigate the uplink throughput achievable by a multiple-user (MU)
massive multiple-input multiple-output (MIMO) system in which the base station
is equipped with a large number of low-resolution analog-to-digital converters
(ADCs). Our focus is on the case where neither the transmitter nor the receiver
have any a priori channel state information. This implies that the fading
realizations have to be learned through pilot transmission followed by channel
estimation at the receiver, based on coarsely quantized observations. We
propose a novel channel estimator, based on Bussgang's decomposition, and a
novel approximation to the rate achievable with finite-resolution ADCs, both
for the case of finite-cardinality constellations and of Gaussian inputs, that
is accurate for a broad range of system parameters. Through numerical results,
we illustrate that, for the 1-bit quantized case, pilot-based channel
estimation together with maximal-ratio combing or zero-forcing detection
enables reliable multi-user communication with high-order constellations in
spite of the severe nonlinearity introduced by the ADCs. Furthermore, we show
that the rate achievable in the infinite-resolution (no quantization) case can
be approached using ADCs with only a few bits of resolution. We finally
investigate the robustness of low-ADC-resolution MU-MIMO uplink against receive
power imbalances between the different users, caused for example by imperfect
power control.

21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex