Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Full-Duplex Cooperative Cognitive Radio with Transmit Imperfections   This paper studies the cooperation between a primary system and a cognitive
system in a cellular network where the cognitive base station (CBS) relays the
primary signal using amplify-and-forward or decode-and-forward protocols, and
in return it can transmit its own cognitive signal. While the commonly used
half-duplex (HD) assumption may render the cooperation less efficient due to
the two orthogonal channel phases employed, we propose that the CBS can work in
a full-duplex (FD) mode to improve the system rate region. The problem of
interest is to find the achievable primary-cognitive rate region by studying
the cognitive rate maximization problem. For both modes, we explicitly consider
the CBS transmit imperfections, which lead to the residual self-interference
associated with the FD operation mode. We propose closed-form solutions or
efficient algorithms to solve the problem when the related residual
interference power is non-scalable or scalable with the transmit power.
Furthermore, we propose a simple hybrid scheme to select the HD or FD mode
based on zero-forcing criterion, and provide insights on the impact of system
parameters. Numerical results illustrate significant performance improvement by
using the FD mode and the hybrid scheme.

12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin