Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: One-Bit Precoding and Constellation Range Design for Massive MIMO with
  QAM Signaling   The use of low-resolution digital-to-analog converters (DACs) for transmit
precoding provides crucial energy efficiency advantage for massive
multiple-input multiple-output (MIMO) implementation. This paper formulates a
quadrature amplitude modulation (QAM) constellation range and one-bit
symbol-level precoding design problem for minimizing the average symbol error
rate (SER) in downlink massive MIMO transmission. A tight upper-bound for SER
with low-resolution DAC precoding is first derived. The derived expression
suggests that the performance degradation of one-bit precoding can be
interpreted as a decrease in the effective minimum distance of the QAM
constellation. Using the obtained SER expression, we propose a QAM
constellation range design for the single-user case. It is shown that in the
massive MIMO limit, a reasonable choice for constellation range with one-bit
precoding is that of the infinite-resolution precoding with per-symbol power
constraint, but reduced by a factor of $\sqrt{2/\pi}$ or about $0.8$. The
corresponding minimum distance reduction translates to about 2dB gap between
the performance of one-bit precoding and infinite-resolution precoding. This
paper further proposes a low-complexity heuristic algorithm for one-bit
precoder design. Finally, the proposed QAM constellation range and precoder
design are generalized to the multi-user downlink. We propose to scale the
constellation range for infinite-resolution zero-forcing (ZF) precoding with
per-symbol power constraint by the same factor of $\sqrt{2/\pi}$ for one-bit
precoding. The proposed one-bit precoding scheme is shown to be within 2dB of
infinite-resolution ZF. In term of number of antennas, one-bit precoding
requires about 50% more antennas to achieve the same performance as
infinite-resolution precoding.

37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom