... pages
doi:10.1155/2008/597072
Research Article
Feedback Reduction in Uplink MIMO OFDM Systems
by Chunk Optimization
Eduard Jorswieck,
1
Aydin Sezgin,
2
Bj
¨
orn Ottersten,
1
and Arogyaswami Paulraj
2
1
ACCESS Linnaeus ... optimization of the
MIMO OFDM MAC under individual power constraints and
under chunk constraints. In order to reduce the feedback
overhead b...
... suboptimal.
Hindawi Publishing Corporation
EURASIP Journal on Advances in Signal Processing
Volume 2008, Article ID 597072, 14 pages
doi:10.1155/2008/597072
Research Article
Feedback Reduction in Uplink MIMO ... optimization of the
MIMO OFDM MAC under individual power constraints and
under chunk constraints. In order to reduce the feedback
overhead by informing t...
... 2
M
p
t−1
k
+
2
M
r
2t
k
2
+
r
2t+1
k
2
(27)
with initial value
p
0
k
= 1.
The metrics in (22) related with coordinate interleaved
STB symbols are not suitable for Viterbi decoding. Substitut-
ing (23 )in( 22) and using (11), the metrics in ... coordinate inter-
leaving to MIMO- OFDM which shows that this technique
provides considerable diversity gain without si...
... Lozano, and R. Valenzuela, “Network
MIMO: overcoming intercell interference in indoor wireless
systems, ” in Proceedings of the 41th Asilomar Conference on
Signals, Systems and Computers, pp. 83–87, ... ρ
k
C), where
N
t,k
and ρ
k
are obtained using (13)and(14)as(since
12 EURASIP Journal on Advances in Signal Processing
and in part by SSF within the Strategic Research Cent...
... z in Corollary 2.8 to get other new results.
Hindawi Publishing Corporation
Journal of Inequalities and Applications
Volume 2009, Article ID 807943, 12 pages
doi:10.1155/2009/807943
Research Article
Univalence ... April 2009
Recommended by Vijay Gupta
The main object of the present paper is to investigate univalence and starlikeness of certain integral
operators, which are defined h...
... pages
doi:10.1155/2008/125735
Research Article
Interference Mitigation in Cooperative SFBC -OFDM
D. Sreedhar and A. Chockalingam
Department of Electrical Communication Engineering, Indian Institute of Science, ... methods using distributed space-time
coding are widely being researched [5, 6].
Recent investigations on cooperative communications
focus on space-time cooperative systems...
... The performance
1
Coding is not considered in this paper. It has been shown that coded bit
loading OFDM systems also greatly outperform coded OFDM systems in
point-to-point networks [17]. Here, ... original work is properly
cited.
1. INTRODUCTION
In cooperative systems, a group of single-antenna nodes
transmits as a “virtual antenna array,” obtaining diver-
sity gain without re...
... coordinate inter-
leaving to MIMO- OFDM which shows that this technique
provides considerable diversity gain without significant in-
crease of encoding and decoding complexities was proposed
by Rao ... 2
M
p
t−1
k
+
2
M
r
2t
k
2
+
r
2t+1
k
2
(27)
with initial value
p
0
k
= 1.
The metrics in (22) related with coordinate interleaved
STB symbols are not suitable f...
... Layzer’s feedback AM instrument is
shown in Figure 1. This instrument is now investigated in
detail by interpreting it as a periodically linear time-variant
filter. The basic FBAM equation with feedback ... 4: Nonlinear Waveshaping. An interesting
modification of the FBAM algorithm can be implemented
by employing a nonlinear mapping of the feedback path,
a process commonly known a...
... November 2006.
[23] C. Simon and G. Leus, “Adaptive feedback reduction for
precoded spatial multiplexing MIMO systems, ” in Proceedings
of the International ITG/IEEE Workshop on Smart Antennas
(WSA ... Journal on Advances in Signal Processing
FH
y
N
S
N
T
N
R
ν
s
+
Feedback link
Figure 1: System model of the linear precoded spatial multiplexing
MIMO system with limited feedbac...