Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Power Allocation for Hybrid DF and CF Protocol with Auxiliary
  Parameter in Fading Relay Channels   In fading channels, power allocation over channel state may bring a rate
increment compared to the fixed constant power mode. Such a rate increment is
referred to power allocation gain. It is expected that the power allocation
gain varies for different relay protocols. In this paper, Decode-and-Forward
(DF) and Compress-and-Forward (CF) protocols are considered. We first establish
a general framework for relay power allocation of DF and CF over channel state
in half-duplex relay channels and present the optimal solution for relay power
allocation with auxiliary parameters, respectively. Then, we reconsider the
power allocation problem for one hybrid scheme which always selects the better
one between DF and CF and obtain a near optimal solution for the hybrid scheme
by introducing an auxiliary rate function as well as avoiding the non-concave
rate optimization problem.

27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph