Performance Evaluation of Two-Hop Wireless Network under Asymmetric Fading Environment


To enhance the reliability of long wireless link, a relay is placed between transmitter and receiver which break the link into two parts: transmitter to relay called 1st hop and relay to receiver called 2nd hop; such arrangement is called two hop wireless links. In two-hop wireless communication sometimes 1st and 2nd hops are affected by different types of fading called asymmetric fading environment. In this paper we consider four different combinations of Rayleigh and Nakagami-m fading on 1st and 2nd hop to observe the profile of combined pdf (probability density function) and cdf (cumulative distribution function). With the help of cdf we determine the variation of outage probability of mixed fading. Finally we plot the SER (symbol error rate) against the SNR (signal to noise ratio) of the 2nd hop for all possible combinations of the two fading taking the SNR of 1st hop as a parameter. Although recent literature deals with asymmetric fading environment but in this paper instead of details statistical model of such fading we provide the relative scenario of mixed fading on 2-hop wireless link.

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Jahan, S. , Islam, M. and Amin, M. (2015) Performance Evaluation of Two-Hop Wireless Network under Asymmetric Fading Environment. Journal of Computer and Communications, 3, 21-27. doi: 10.4236/jcc.2015.312003.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Rankov, B. and Wittned, A. (2007) Spectral Efficient Protocols for Half-Duplex Fading Relay Channels. IEEE Journal on Selected Areas in Communications, 25, 379-389.
[2] 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.
[3] Hasna, M.O. and Alouini, M.-S. (2004) Performance Study of Dual-Hop Transmissions with Fixed Gain Relays. IEEE Transactions on Wireless Communications, 3, 1963-1968.
[4] Chaudary, Muhammad Hasanain and Nandana Rajatheva, “Performance Analysis of Analog Network Coding Based Two-Way Amplify-and-Forward System in Mixed Rician and Nakagami-m Fading Environment. EURASIP Journal on Wireless Communications and Networking, 2012, 209.
[5] Nadia, A., Chowdhuray, A.R., Islam, Md.I., Hossain, Md.S. and Amin, M.R. (2013) Performance Evaluation of Two-Hop Wireless Link under Nakagami-m Fading. International Journal of Advanced Computer Science and Applications (IJACSA), 4, 142-146.
[6] Gurung, A.K., Al-Qahtani, F.S., Hussain, Z.M. and Alnuwarii, H. (2010) Performance Analysis of Amplify-Forward Relay in Mixed Nakagami-m and Rician Fading Channels. International Conference on Advanced Technologies for Communications, HO Chi Minh City, 20-22 Oct. 2010, 321-326.
[7] Suraweera, H.A., Louie, R.H.Y., Li, Y.H., Karagiannidis, G.K. and Vucetic, B. (2009) Two Hop Amplify-and-Forward Transmission in Mixed Rayleigh and Rician Fading Channels. IEEE Communications Letters, 13, 227-229.
[8] Kapucu, N., Bilim, M., Develi, I. and Kabalci, Y. (2015) Performance of Two-Hop Relay Assisted Decode-and-Forward Transmission under Mixed Fading Environments. Elektronika ir Elektrotechnika, 21, 60-63.
[9] Yilmaz, A. and Kucur, O. (2011) Performance of Transmit Antenna Selection and Maximal-Ratio Combining in Dual Hop Amplify-and-Forward Relay Network over Nakagami-m Fading Channels. Wireless Personal Communications, 67, 485-503.
[10] Chen, S., Wang, W., Zhang, X. and Zhao, D. (2009) Performance Amplify-and-Forward MIMO Relay Channels with Transmit Antenna Selection and Maximal Ratio Combining. IEEE Wireless Communications and Networking Conference (WCNC’09), Budapest, 5-8 April 2009, 1-6.
[11] Zedini, E., Ansari, I.S. and Alouini, M.-S. (2015) Performance Analysis of Mixed Nakagami-m and Gamma-Gamma Dual-Hop FSO Transmission Systems. IEEE Photonics Journal, 7, Article #: 7900120.
[12] Olabiyi, O. and Annamalai, A. (2012) Efficient Symbol Error Rate Analysis of Cooperative Non-Regenerative Relay Systems over Generalized Fading Channels. International Journal of Wireless & Mobile Networks (IJWMN), 4, 1-20.
[13] Elkashlan, M., Yeoh, P.L., Yang, N., Duong, T.Q. and Leung, C. (2012) A Comparison of Two MIMO Relaying Protocols in Nakagami-m Fading. IEEE Transactions on Vehicular Technology, 61, 1416-1422.

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