© The Institution of Engineering and Technology
A relaying technique based on single-relay selection is studied for multiple-relay networks when hierarchical modulation is employed for unequal error protection. A single-relay selection scheme achieves a higher bandwidth efficiency while maintaining the same diversity order as when all the relays are selected in a multiple-relay network. Specifically, a cooperative network with one source, K relays, and one destination is considered in which two different protection information classes are modulated by a hierarchical 2/4-amplitude shift keying (ASK) constellation at the source. After selecting a relay to cooperate with the source, based on the instantaneous received signal-to-noise ratio, the selected relay decides to retransmit both classes by using a hierarchical 2/4-ASK constellation, or the more protection class by using a 2-ASK constellation, or remains silent. The approximated bit error rate (BER) of each information class is derived. Optimal thresholds are chosen to minimise the BER of one class while the BER of the other class satisfies a requirement. Numerical and simulation results are provided to validate the analysis. The results also show that the optimal thresholds can improve the error performance significantly.
References
-
-
1)
-
A. Bletsas ,
H. Shin ,
M. Win
.
Outage optimality of opportunistic amplify-and-forward relaying.
IEEE Commun. Lett.
,
261 -
263
-
2)
-
A. Sendonaris ,
E. Erkip ,
B. Aazhang
.
User cooperation diversity, Part II: Implementation aspects and performance analysis.
IEEE Trans. Commun.
,
11 ,
1939 -
1948
-
3)
-
E. Beres ,
R. Adve
.
Selection cooperation in multi-source cooperative networks.
IEEE Trans. Wirel. Commun.
,
118 -
127
-
4)
-
M. Chiu ,
C. Chao
.
Low-decoding-complexity TDM coded modulation with unequal error protection.
IEE Proc. Commun.
,
6 ,
372 -
379
-
5)
-
A. Calderbank ,
N. Seshadri
.
Multilevel codes for unequal error protection.
IEEE Trans. Infor. Theory
,
1234 -
1248
-
6)
-
D. Michalopoulos ,
G. Karagiannidis
.
Performance analysis of single relay selection in Rayleigh fading.
IEEE Trans. Wirel. Commun.
,
3718 -
3724
-
7)
-
A. Ribeiro ,
X. Cai ,
G. Giannakis
.
Symbol error probabilities for general cooperative links.
IEEE Trans. Wirel. Commun.
,
1264 -
1273
-
8)
-
A. Sendonaris ,
E. Erkip ,
B. Aazhang
.
User cooperation diversity, part I: system description.
IEEE Trans. Commun.
,
11 ,
1927 -
1938
-
9)
-
P. Herhold ,
E. Zimmermann ,
G. Fettweis
.
A simple cooperative extension to wireless relaying.
Int. Zurich Seminar on Communications
,
36 -
39
-
10)
-
Z. Pereira ,
M. Pellenz ,
R. Souza ,
M.A. Siqueira
.
Unequal error protection for LZSS compressed data using Reed-Solomon codes.
IET Commun.
,
4 ,
612 -
617
-
11)
-
H.X. Nguyen ,
H.H. Nguyen ,
T. Le-Ngoc
.
Signal transmission with unequal error protection in wireless relay networks.
IEEE Trans. Veh. Technol.
-
12)
-
P. Vitthaladevuni ,
M.-S. Alouini
.
Exact BER computation of generalized hierarchical PSK constellations.
IEEE Trans. Commun.
,
2030 -
2037
-
13)
-
P. Vitthaladevuni ,
M.-S. Alouini
.
A recursive algorithm for the exact BER computation of generalized hierarchical QAM constellations.
IEEE Trans. Infor. Theory
,
297 -
307
-
14)
-
I.S. Gradshteyn ,
I.M. Ryzhik
.
(1994)
Table of integrals, series, and products.
-
15)
-
J.N. Laneman ,
G.W. Wornell
.
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks.
IEEE Trans. Inf. Theory
,
2415 -
2425
-
16)
-
D.P. Bertsekas
.
(1996)
Constrained optimization and lagrange multiplier methods.
-
17)
-
M. Pursley ,
J. Shea
.
Nonuniform phase-shift-key modulation for multimedia multicast transmission in mobile wireless networks.
IEEE J. Select. Areas Commun.
,
774 -
783
-
18)
-
Y. Jing ,
B. Hassibi
.
Distributed space-time coding in wireless relay networks.
IEEE Trans. Wirel. Commun.
,
12 ,
3524 -
3536
-
19)
-
M.-K. Chang ,
S.-Y. Lee
.
Performance analysis of cooperative communication system with hierarchical modulation over Rayleigh fading channel.
IEEE Trans. Wirel. Commun.
,
2848 -
2852
-
20)
-
J. Kim ,
G. Pottie
.
Unequal error protection TCM codes.
IEE Proc. Commun.
,
5 ,
265 -
272
-
21)
-
T. Wang ,
A. Cano ,
G. Giannakis ,
J. Ramos
.
Multi-tier cooperative broadcasting with hierarchical modulations.
IEEE Trans. Wirel. Commun.
,
3047 -
3057
-
22)
-
M. Aydinlik ,
M. Salehi
.
Turbo coded modulation for unequal error protection.
IEEE Trans. Commun.
,
555 -
564
-
23)
-
F.A. Onat ,
A. Adinoyi ,
Y. Fan ,
H. Yanikomeroglu ,
J.S. Thompson ,
I.D. Marsland
.
Threshold selection for SNR-based selective digital relaying in cooperative wireless networks.
IEEE Trans. Wirel. Commun.
,
4226 -
4237
-
24)
-
M. Hossain ,
P. Vitthaladevuni ,
M.-S. Alouini ,
V. Bhargava ,
A. Goldsmith
.
Adaptive hierarchical modulation for simultaneous voice and multiclass data transmission over fading channels.
IEEE Trans. Veh. Technol.
,
1181 -
1194
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-com.2009.0521
Related content
content/journals/10.1049/iet-com.2009.0521
pub_keyword,iet_inspecKeyword,pub_concept
6
6