This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Coordinated multipoint (CoMP) from long term evolution (LTE)-advanced is a promising technique to enhance the system spectral efficiency. Among the CoMP techniques, joint transmission has high communication requirements, because of the data sharing phase through the backhaul network, and coordinated scheduling and beamforming reduces the backhaul requirements, since no data sharing is necessary. Most of the available CoMP techniques consider perfect channel knowledge at the transmitters. Nevertheless for practical systems this is unrealistic. Therefore in this study the authors address this limitation by proposing a robust precoder for a multicell-based systems, where each base station (BS) has only access to an imperfect local channel estimate. They consider both the case with and without data sharing. The proposed precoder is designed in a distributed manner at each BS by maximising the signal-to-leakage-and-noise ratio of all jointly processed users. By considering the channel estimation error in the design of the precoder, they are able to reduce considerably the impact of these errors in the system's performance. The results show that the proposed scheme has improved performance especially for the high signal-to-noise ratio regime, where the impact of the channel estimation error may be more pronounced.
References
-
-
1)
-
5. Jing, S., Tse, D.N.C., Sorianga, J.B., Hou, J., Smee, J.E., Padovani, R.: ‘Multicell downlink capacity with coordinated processing’, EURASIP J. Wirel. Commun. Netw., 2008, 2008, (18), pp. 1–19 (doi: 10.1155/2008/586878).
-
2)
-
4. Gesbert, D., Hanly, S., Huang, H., et al: ‘Multi-cell MIMO cooperative networks: a new look at interference’, IEEE J. Sel. Areas Commun., 2010, 28, (9), pp. 1380–1408 (doi: 10.1109/JSAC.2010.101202).
-
3)
-
18. Larsson, E., Jorswieck, E.: ‘Competition versus cooperation on the MISO interference channel’, IEEE J. Sel. Areas Commun., 2008, 26, (7), pp. 1059–1069 (doi: 10.1109/JSAC.2008.080904).
-
4)
-
13. Taesang, Y., Goldsmith, A.: ‘Capacity and power allocation for fading MIMO channel with channel estimation error’, IEEE Trans. Inf. Theory, 2006, 52, (5), pp. 2203–2214 (doi: 10.1109/TIT.2006.872984).
-
5)
-
12. Castanheira, D., Silva, A., Gameiro, A.: ‘Linear and nonlinear precoding schemes for centralized multicell MIMO-OFDM systems’, Wirel. Pers. Commun., 2013, 72, (1), pp. 759–777 (doi: 10.1007/s11277-013-1041-z).
-
6)
-
13. Zakhour, R., Gesbert, D.: ‘Distributed multicell-MISO precoding using the layered virtual SINR framework’, IEEE Trans. Wirel. Commun., 2010, 9, (8), pp. 2444–2448 (doi: 10.1109/TWC.2010.061710.091648).
-
7)
-
4. Mudumbai, R., Brown, D.R., Madhow, U., et al: ‘Distributed transmit beamforming: Challenges and recent progress’, IEEE Commun. Mag., 2009, 47, (2), pp. 102–110 (doi: 10.1109/MCOM.2009.4785387).
-
8)
-
8. Sadek, M., Tarighat, A., Sayed, A.: ‘A leakage-based precoding scheme for downlink multi-user MIMO channels’, IEEE Trans. Wirel. Commun., 2007, 6, (5), pp. 1711–1721 (doi: 10.1109/TWC.2007.360373).
-
9)
-
11. Björnson, E., Zakhour, R., Gesbert, D., Ottersten, B.: ‘Cooperative multicell precoding: rate region characterization and distributed strategies with instantaneous and statistical CSI’, IEEE Trans. Signal Process., 2010, 58, (8), pp. 4298–4310 (doi: 10.1109/TSP.2010.2049996).
-
10)
-
2. Zhang, J., Chen, R., Anddrews, J.G., et al: ‘Network MIMO with clustered linear precoding’, IEEE Trans. Wireless Commun., 2009, 8, (4), pp. 1910–1921 (doi: 10.1109/TWC.2009.080180).
-
11)
-
T. Yoo ,
A. Goldsmith
.
Capacity and power allocation for fading MIMO channels with channel estimation error.
IEEE Trans. Inf. Theory
,
5 ,
2203 -
2214
-
12)
-
4. 3GPP: ‘Coordinated multi-point operation for LTE physical layer aspects’. , 2011.
-
13)
-
S. Jing ,
D.N.C. Tse ,
J.B. Soriaga ,
J. Hou ,
J. Smee ,
R. Padovani
.
Multicell downlink capacity with coordinated processing.
EURASIP J. Wirel. Commun. Netw.
,
18 ,
1 -
19
-
14)
-
15. Silva, A., Holakouei, R., Gameiro, A.: ‘A novel distributed power allocation scheme for coordinated multicell systems’, EURASIP J. Wirel. Commun. Netw., 2013, 30, pp. 1–11.
-
15)
-
M. Sadek ,
A. Tarighat ,
A.H. Sayed
.
A leakage-based precoding scheme for downlink multi-user MIMO channels.
IEEE Trans. Wirel. Commun.
,
5 ,
1711 -
1721
-
16)
-
16. Zakhour, R., Gesbert, D.: ‘Coordination on the MISO interference channel using the virtual SINR framework’. Proc. of ITG/IEEE Workshop on Smart Antennas, 2009.
-
17)
-
2. Gesbert, D., Hanly, S., Huang, H., Shamai, S.: ‘Multi-cell MIMO cooperative networks: a new look at interference’, IEEE J. Sel. Areas Commun., 2010, 28, (9), pp. 1380–1408 (doi: 10.1109/JSAC.2010.101202).
-
18)
-
E.G. Larsson ,
E.A. Jorswieck
.
Competition versus cooperation on the MISO interference channel.
IEEE J. Select. Areas Commun.
,
1059 -
1069
-
19)
-
12. Castanheira, D., Silva, A., Gameiro, A.: ‘Linear and nonlinear precoding schemes for centralized multicell MIMO-OFDM systems’, Wirel. Pers. Commun., 2013, 72, (1), pp. 759–777 (doi: 10.1007/s11277-013-1041-z).
-
20)
-
20. Goluband, G., Loan, C.V.: ‘Matrix computations’ (The Johns Hopkins University Press, Baltimore, MD, 1996, 3rd edn.).
-
21)
-
7. Marsch, P., Fettweis, G.: ‘On downlink network MIMO under a constrained backhaul and imperfect channel knowledge’. Proc. IEEE GLOBECOM'09, 2009.
-
22)
-
8. Armada, A.G., Fernándes, M.S., Corvaja, R.: ‘Waterfilling schemes for zero-forcing coordinated base station transmissions’. Proc. IEEE GLOBECOM'09, 2009.
-
23)
-
R. Mudumbai ,
D.R. Brown ,
U. Madhow ,
H.V. Poor
.
Distributed transmit beamforming: challenges and recent progress.
IEEE Commun. Mag.
,
2 ,
102 -
110
-
24)
-
11. Zhang, R.: ‘Cooperative multi-cell block diagonalization with per-base-station power constraints’. Proc. IEEE WCNC'10, 2010.
-
25)
-
9. Kobayashi, M., Debbah, M., Belfiore, J.: ‘Outage efficient strategies in network MIMO with partial CSIT’. Proc. ISIT'09, 2009.
-
26)
-
6. Castanheira, D., Gameiro, A.: ‘Distributed antenna system capacity scaling’, IEEE Commun. Mag., 2010, 17, (3), pp. 78–75.
-
27)
-
E. Bjornson ,
R. Zakhour ,
D. Gesbert ,
B. Ottersten
.
Cooperative multicell precoding: rate region characterization and distributed strategies with instantaneous and statistical CSI.
IEEE Trans. Signal Process.
,
8 ,
4298 -
4310
-
28)
-
13. Zakhour, R., Gesbert, D.: ‘Distributed multicell-MISO precoding using the layered virtual SINR framework’, IEEE Trans. Wirel. Commun., 2010, 9, (8), pp. 2444–2448 (doi: 10.1109/TWC.2010.061710.091648).
-
29)
-
1. Karakayali, M., Foschini, G., Valenzuela, R.: ‘Network coordination for spectral efficient communications in cellular systems’, IEEE Commun. Mag., 2006, 13, (4), pp. 56–61.
-
30)
-
10. Zhang, J., Chen, R., Andrews, J.G., Ghosh, A., Heath, R.W.Jr.: ‘Networked MIMO with clustered linear precoding’, IEEE Trans. Wirel. Commun., 2009, 8, (4), pp. 1910–1921 (doi: 10.1109/TWC.2009.080180).
http://iet.metastore.ingenta.com/content/journals/10.1049/joe.2014.0141
Related content
content/journals/10.1049/joe.2014.0141
pub_keyword,iet_inspecKeyword,pub_concept
6
6