Amplify and Forward Relaying Systems for Collocated Antennas

Mahmud Al-Naser, Salem Salamah

Department of Electronic Engineering Technology, Public Authority of Applied Education and Training, Al Shuwaik, Kuwait.

DOI: 10.4236/ijcns.2014.77025                

Abstract

Cooperative relaying for a system that consists of different configurations of a collocated and uniform linear antenna is analyzed. The amplify-and-forward relaying (AF) and selection combining (S-AF) schemes based on maximal ratio combining (MRC) method for single- and multi-relay are investigated. In this study, the bit-error-rate (BER) expression for collocated and uniform linear antenna in cooperative communication system over flat Rayleigh fading channel is derived. The result for 3-element collocated antennas (tripole) shows improvement in performance over dual-polarized antennas. Also increasing number of tripole antenna does not add improvement.

Keywords

Cooperative Communications, Fading Channels, Relay, Antennas

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Emamian, V., Anghel, P. and Kaveh, M. (2002) Multi-User Spatial Diversity in a Shadow-Fading Environment. IEEE Vehicular Technology Conference, 1, 573-576.
[2]	Sendonaris, A., Erkip, E. and Aazhang, B. (2003) User Cooperation Diversity. Part I. System Description. IEEE Transactions on Communications, 51, 1927-1938. http://dx.doi.org/10.1109/TCOMM.2003.818096
[3]	Hasna, M.O. and Alouini, M.S. (2003) End-to-End Performance of Transmission Systems with Relays over Rayleigh-Fading Channels. IEEE Transactions on Wireless Communications, 2, 1126-1131. http://dx.doi.org/10.1109/TWC.2003.819030
[4]	Laneman, J.N. and Wornell, G.W. (2003) Distributed Space-Time-Coded Protocols for Exploiting Cooperative Diversity in Wireless Networks. IEEE Transactions on Information Theory, 49, 2415-2425. http://dx.doi.org/10.1109/TIT.2003.817829
[5]	Adinoyi, A. and Yanikomeroglu, H. (2007) Cooperative Relaying in Multi-Antenna Fixed Relay Networks. IEEE Transactions on Wireless Communications, 6, 533-544. http://dx.doi.org/10.1109/TWC.2007.05227
[6]	Zhao, Y., Adve, R. and Lim, T.J. (2006) Symbol Error Rate of Selection Amplify-and-Forward Relay Systems. IEEE Communications Letters, 10, 757. http://dx.doi.org/10.1109/LCOMM.2006.060774
[7]	Zhao, Y., Adve, R. and Lim, T.J. (2006) Improving Amplify-and-Forward Relay Networks: Optimal Power Allocation versus Selection. IEEE International Symposium on Information Theory, 1234-1238.
[8]	Ikki, S. and Ahmed, M. (2008) Performance of Multiple-Relay Cooperative Diversity Systems with Best Relay Selection over Rayleigh Fading Channels. EURASIP Journal on Advances in Signal Processing, 2008, Article ID: 580368. http://dx.doi.org/10.1155/2008/580368
[9]	Min, H., Lee, S., Kwak, K. and Hong, D. (2009) Effect of Multiple Antennas at the Source on Outage Probability for Amplify-and-Forward Relaying Systems. IEEE Transactions on Wireless Communications, 8, 633-637. http://dx.doi.org/10.1109/TWC.2009.071332
[10]	Dey, A., Ghosh, P.K. and Gupta, K. (2011) On the Performance Analysis of Multi-Antenna Relaying System over Rayleigh Fading Channel. International Journal on Control System & Instrumentation, 2, 46.
[11]	Naguib, A.F. and Paularj, A. (1994) Performance of CDMA Cellular Networks with Base-Station Antenna Arrays. Proceedings of International Zurich Seminar on Digital Communications, 1-5 May 1994, 87-100.
[12]	Andrews, M.R., Mitra, P. and De Carvalho, R. (2001) Tripling the Capacity of Wireless Communications Using Electromagnetic Polarization. Nature, 409, 316-318. http://dx.doi.org/10.1038/35053015
[13]	Nehorai. A. and Paldi, E. (1994) Vector-Sensor Array Processing for Electromagnetic Source Localization. IEEE Transactions on Signal Processing, 42, 376-398. http://dx.doi.org/10.1109/78.275610
[14]	Simon, M.K. and Alouini, M.S. (2000) Digital Communication over Fading Channels: A Unified Approach to Performance Analysis. Wiley, New York. http://dx.doi.org/10.1002/0471200697