Performance Analysis of a Novel Dual-Frequency Multiple Access Relay Transmission Scheme

Javier DEL SER, Babak H. KHALAJ

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DOI: 10.4236/ijcns.2009.27066                

Abstract

In this paper we present the performance analysis of a novel channel assignment scheme where two non-cooperative independent users simultaneously communicate with their destination through a single relay by using only two frequency channels. The analytic derivation of the probability of symbol error for two main relay techniques will be provided, namely Amplify-and-Forward (AF) and Decode-and-Forward (DF). As shown by the obtained results, our switched-frequency approach results in a model that can achieve full- diversity by means of maximum-likelihood decoding at the receiver. Our results are especially important in the DF case, since in traditional techniques (such as half-duplex two-time slot approaches) two sources si-multaneously transmit on the same channel through the first time slot, which necessitates some sort of su-perposition coding. However, since in our scheme both users transmit over orthogonal channels, such a coding scheme is not required. In addition, it is shown that the DF approach based on our novel channel assign-ment scheme outperforms the AF scheme, especially in scenarios where the relay is closer to the receiver.

Keywords

Multiple Access Relay Channel, Frequency Switching, Non-Cooperative Networks, Maximum Likelihood Decoding

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	C. T. K. Ng and A. J. Goldsmith, “Capacity and coopera-tion in wireless networks,” in Proceedings of Information Theory and Applications (ITA) Workshop, February 2006.
[2]	——, “The impact of CSI and power allocation on relay channel capacity and cooperation strategies,” submitted to IEEE Transactions on Information Theory, January 2007.
[3]	S. Avestimehr and D. Tse, “Outage capacity of the fading relay channel in the low SNR regime,” IEEE Transac-tions on Information Theory, Vol. 53, No. 4, pp. 1401–1415, April 2007.
[4]	R. U. Nabar and H. Kneubuhler, F.W.; Bolcskei, “Per-formance limits of amplify-and-forward based fading re-lay channels,” in Proceedings of IEEE International Con-ference on Audio, Speech and Signal Processing (ICASSP), May 2004.
[5]	C. Hausl and P. Dupraz, “Joint network-channel coding for the multiple-access relay channel,” in Proceedings of International Workshop on Wireless Ad Hoc and Sensor Networks (IWWAN), June 2006.
[6]	J. Del Ser, P. M. Crespo, B. H. Khalaj, and J. Gutierrez-Gutierrez, “On combining distributed joint source-channel-network coding and turbo equalization in multiple access relay networks,” in Proceedings of 3rd IEEE International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob’ 07), October 2007.
[7]	G. Kramer and A. J. van Wijngaarden, “On the white gaussian multiple access relay channel,” in Proceedings of the International Symposium on Information Theory, June 2000.
[8]	L. Sankaranarayanan, G. Kramer, and N. B. Mandayam, “Capacity theorems for the multiple-access relay chan-nel,” in Proceedings of the 42nd Annual Allerton Con-ference on Communication, Control, and Computing, October 2004.
[9]	A. Sendonaris, E. Erkip, and B. Aazhang, “User coopera-tion diversity – Part I: System description,” IEEE Trans-actions on Communications, Vol. 51, No. 11, pp. 1927–1938, November 2003.
[10]	T. E. Hunter and A. Nosratinia, “Cooperation diversity through coding,” in Proceedings of the IEEE Interna-tional Symposium on Information Theory, 2002.
[11]	J. N. Laneman, D. N. C. Tse, and G. W. Wornell, “Coop-erative diversity in wireless networks: Efficient protocols and outage behavior,” IEEE Transactions on Information Theory, Vol. 50, No. 12, pp. 3062–3080, December 2004.
[12]	S. Valentin, H. S. Lichte, H. Karl, G. Vivier, S. Simoens, J. Vidal, A. Agustin, and I. Aad, “Cooperative wireless networking beyond store-and-forward: Perspectives for PHY and MAC design,” in Proceedings of the 17th Wireless World Research Forum Meeting (WWRF 17), November 2006.
[13]	P. Herhold, E. Zimmermann, and G. Fettweis, “On the performance of cooperative amplify-and-forward relay networks,” in Proceedings of the 5th International ITG Conference on Source and Channel Coding (SCC), Janu-ary 2004.
[14]	K. Azarian, H. E. Gamal, and P. Schniter, “On the achievable diversity-multiplexing tradeoff in half-duplex cooperative channels,” IEEE Transactions on Information Theory, Vol. 51, No. 12, pp. 4152–4172, December 2005.
[15]	M. Yu and J. T. Li, “Is amplify-and-forward practically better than decode-and-forward or viceversa?” in Pro-ceedings of the IEEE International Conference on Audio, Speech and Signal Processing (ICASSP), Vol. 3, pp. 365–368, March 2005.
[16]	N. Seshadri and J. H. Winters, “Two signaling schemes for improving the error performance of frequency-divi- sion-multiplex (FDD) transmission systems using transmitter antenna diversity,” in Proceedings of the IEEE Vehicular Technology Conference, Vol. 1, pp. 508–511, May 1993.
[17]	A. Wittneben, “A new bandwidth efficient transmit an-tenna modulation diversity scheme for linear digital modulation,” in Proceedings of IEEE International Con-ference on Communications, Vol. 3, pp. 1630–1634, May 1993.
[18]	V. Tarokh, N. Seshadri, and A. Calderbank, “Space-time codes for high data rate wireless communication: Performance analysis and code construction,” IEEE Transactions on Information Theory, Vol. 44, No. 3, pp. 744–765, March 1998.
[19]	D. Chen, K. Azarian, and J. N. Laneman, “A case for amplify-forward relaying in the block-fading multiaccess channel,” submitted to IEEE Transactions on Information Theory, January 2007.
[20]	L. Sankar, G. Kramer, and N. B. Mandayam, “Offset encoding for multiple access relay channels,” IEEE Transactions on Information Theory, Vol. 53, No. 10, pp. 3814–3821, October 2007.
[21]	L. Sankar, Y. Linang, H. V. Poor, and N. Mandayam, “Opportunistic communication in an orthogonal multiac-cess relay channel,” in Proceedings of the International Symposium on Information Theory, June 2007.
[22]	B. H. Khalaj, J. Del Ser, P. M. Crespo, and J. Gutierrez- Gutierrez, “A novel dual-frequency multiple access relay transmission scheme,” in Proceedings of IEEE Interna-tional Symposium on Personal, Indoor, and Mobile Radio Communications (IEEE PIMRC), September 2007.
[23]	B. Sklar, “Rayleigh fading channels in mobile digital communication systems Part I: Characterization,” IEEE Communications Magazine, Vol. 35, No. 7, pp. 90–100, July 1997.
[24]	H. Ju, S. Lee, K. Kwak, E. Oh, and D. Hong, “A new duplex without loss of data rate and utilizing selection diversity,” in Proceedings of IEEE Vehicular Technology Conference, pp. 1519–1523, May 2008.
[25]	C. Hausl, F. Schreckenbach, I. Oikonomidis, and G. Bauch, “Iterative network and channel decoding on a tanner graph,” in Proceedings of 43rd Allerton Confer-ence on Communication, Control, and Computing, Sep-tember 2005.
[26]	H. Jafarkhani, “Space-time coding, theory and practice,” Cambridge University Press, 2005.
[27]	H. Kuai, F. Alajaji, and G. Takahara, “Tight error bounds for nonuniform signaling over AWGN channels,” IEEE Transactions on Information Theory, Vol. 46, No. 7, pp. 2712–2718, November 2000.