Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Soft-Output Finite Alphabet Equalization for mmWAVE Massive MIMO   Next-generation wireless systems are expected to combine millimeter-wave
(mmWave) and massive multi-user multiple-input multiple-output (MU-MIMO)
technologies to deliver high data-rates. These technologies require the
basestations (BSs) to process high-dimensional data at extreme rates, which
results in high power dissipation and system costs. Finite-alphabet
equalization has been proposed recently to reduce the power consumption and
silicon area of uplink spatial equalization circuitry at the BS by coarsely
quantizing the equalization matrix. In this work, we improve upon
finite-alphabet equalization by performing unbiased estimation and soft-output
computation for coded systems. By simulating a massive MU-MIMO system that uses
orthogonal frequency-division multiplexing and per-user convolutional coding,
we show that soft-output finite-alphabet equalization delivers competitive
error-rate performance using only 1 to 3 bits per entry of the equalization
matrix, even for challenging mmWave channels.

16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas