Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tradeoff Analysis of Delay-Power-CSIT Quality of Dynamic BackPressure
  Algorithm for Energy Efficient OFDM Systems   In this paper, we analyze the fundamental power-delay tradeoff in
point-to-point OFDM systems under imperfect channel state information quality
and non-ideal circuit power. We consider the dynamic back- pressure (DBP)
algorithm, where the transmitter determines the rate and power control actions
based on the instantaneous channel state information (CSIT) and the queue state
information (QSI). We exploit a general fluid queue dynamics using a continuous
time dynamic equation. Using the sample-path approach and renewal theory, we
decompose the average delay in terms of multiple unfinished works along a
sample path, and derive an upper bound on the average delay under the DBP power
control, which is asymptotically accurate at small delay regime. We show that
despite imperfect CSIT quality and non-ideal circuit power, the average power
(P) of the DBP policy scales with delay (D) as P = O(Dexp(1/D)) at small delay
regime. While the impacts of CSIT quality and circuit power appears as the
coefficients of the scaling law, they may be significant in some operating
regimes.

13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc