Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy-Efficient Delay-Constrained Transmission and Sensing for
  Cognitive Radio Systems   In this work we study energy-efficient transmission for Cognitive Radio (CR)
which opportunistically operates on Primary User's (PU's) channel through
spectrum sensing. Spectrum sensing and compulsory idling (for incumbent
protection) introduce energy-overheads for Secondary User's (SU's) operations,
and thus an appropriate balance between energy consumption in data transmission
and energy-overheads is required. We formulate this problem as a discrete-time
Markov Decision Process (MDP) in which the SU aims at minimizing its average
cost (including both energy consumption and delay cost) to finish a target
traffic payload through an appropriate rate allocation. Based on Certainty
Equivalent Control, we propose a low-complexity rate-adaptation policy that
achieves comparable performance as the optimal policy. With the low-complexity
policy, we quantify the impact of energy-overheads (including the power
consumption for spectrum sensing and compulsory idling) on the SU transmission
strategy. Specifically, the SU rate increases with the increase of
energy-overheads, whose marginal impact, however, diminishes. Moreover, the
marginal impact of energy-overheads is more significant for delay-insensitive
traffic compared to that for delay-sensitive traffic. To mitigate the loss due
to imperfect spectrum sensing, we quantify that the SU decreases (increases)
its rate with a larger mis-detection probability (false alarm probability).

19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con