Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Frequency-Domain Decoupling for MIMO-GFDM Spatial Multiplexing   Generalized frequency division multiplexing (GFDM) is considered a
non-orthogonal waveform and known to encounter difficulties when using in the
spatial multiplexing mode of multiple-input-multiple-output (MIMO) scenario. In
this paper, a class of GFDM prototype filters, under which the GFDM system is
free from inter-subcarrier interference, is investigated, enabling
frequency-domain decoupling in the processing at the GFDM receiver. An
efficient MIMO-GFDM detection method based on depth-first sphere decoding is
then proposed with such class of filters. Numerical results confirm a
significant reduction in complexity, especially when the number of subcarriers
is large, compared with existing methods presented in recent years.

22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph