Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Throughput Optimal Policies for Energy Harvesting Wireless Transmitters
  with Non-Ideal Circuit Power   Characterizing the fundamental tradeoffs for maximizing energy efficiency
(EE) versus spectrum efficiency (SE) is a key problem in wireless
communication. In this paper, we address this problem for a point-to-point
additive white Gaussian noise (AWGN) channel with the transmitter powered
solely via energy harvesting from the environment. In addition, we assume a
practical on-off transmitter model with non-ideal circuit power, i.e., when the
transmitter is on, its consumed power is the sum of the transmit power and a
constant circuit power. Under this setup, we study the optimal transmit power
allocation to maximize the average throughput over a finite horizon, subject to
the time-varying energy constraint and the non-ideal circuit power consumption.
First, we consider the off-line optimization under the assumption that the
energy arrival time and amount are a priori known at the transmitter. Although
this problem is non-convex due to the non-ideal circuit power, we show an
efficient optimal solution that in general corresponds to a two-phase
transmission: the first phase with an EE-maximizing on-off power allocation,
and the second phase with a SE-maximizing power allocation that is
non-decreasing over time, thus revealing an interesting result that both the EE
and SE optimizations are unified in an energy harvesting communication system.
We then extend the optimal off-line algorithm to the case with multiple
parallel AWGN channels, based on the principle of nested optimization. Finally,
inspired by the off-line optimal solution, we propose a new online algorithm
under the practical setup with only the past and present energy state
information (ESI) known at the transmitter.

4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph