Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Efficient 3D Space Time Space Block Code for Future Terrestrial Digital
  TV   This article introduces a 3D space-time-space block code for future
terrestrial digital TV in single frequency networks. The proposed 3D code is
based on a double layer structure designed for inter-cell and intra-cell space
time coded transmissions. We show that this new structure is particularly
efficient for SFN environments regardless of the location of the receiver. It
is then suitable for fixed, portable and mobile receptions.

18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci