Copyright © 2008 The Institute of Electronics, Information and Communication Engineers
Regular Section -- Papers -- Wireless Communication Technologies |
Code Combining in Cooperative Communication
1 The authors are with the Department of Electrical Engineering, University of Ulsan, Korea. E-mail: asad78{at}mail.ulsan.ac.kr
It is well known that cooperative transmission among the single antenna wireless nodes and a proper combining at destination can obtain spatial diversity. In this paper, we introduce a new form of combining technique in cooperative communication. For a coded transmission scheme code-combining can obtain a near optimal low rate code by combining repeated codewords. Instead of MRC (maximal ratio combining) based combining of received coded packets from source and relays, we propose a simple code-combining at destination. For same data rate and power consumption code-combining offers better or similar performance with less complexity than MRC. Moreover using a puncturing technique at the relay we can get a same diversity order as MRC with reduced packet relaying time; equivalently, with higher data rate for over all system. This reduction of transmission time at relay allows us to increase the diversity order by using more than one relay for one source; where each relay forwards a punctured portion of received data. Alternatively, when the relays are not available to improve diversity order, we can use only one relay to cooperate M source nodes where all sources obtain a diversity order of 2 with a higher data rate.
Key Words: cooperative transmission, code combining, puncturing, fading channel, diversity
Manuscript received July 23, 2007. Manuscript revised November 11, 2007.
Reference
[1] A. Hedayat, T.E. Hunter, and A. Nosratinia, "Cooperative communication in wireless networks," IEEE Commun. Mag., vol.42, no.10, pp.68–73, Oct. 2004. [2] J.N. Laneman, D.N.C. Tse, and G.W. Wornell, "Cooperative diversity in wireless networks: Efficient protocols and outage behavior," IEEE Trans. Inf. Theory, vol.50, no.12, pp.3062–3080, Dec. 2004. [3] T.E. Hunter and A. Nosratinia, "Diversity through coded cooperation," IEEE Trans. Wireless Commun., vol.5, no.2, pp.283–289, Feb. 2006. [4] A. Stefanov and E. Erkip, "Cooperative coding for wireless networks," IEEE Trans. Commun., vol.52, no.9, pp.1470–1476, Sept. 2004. [5] D.G. Brennan, "Linear diversity combining techniques," Proc. IEEE, vol.91, no.2, pp.331–356, Feb. 2003. [6] D. Chase, "Code-combining — A maximum likelihood decoding approach for combining an arbitrary number of noisy packets," IEEE Trans. Commun., vol.COM-33, no.5, pp.385–393, May 1985. [7] S. Yi, A. Sadjadit, S. Kalyanaraman, and V. Subramanian, "Error control code-combining techniques in cluster-based cooperative wireless networks," IEEE International Conference on Communications, 2005, vol.5, pp.3510–3514, May 2005. [8] J. Hagenauer, "Rate-compatible punctured convolutional codes (RCPC Codes) and their applications," IEEE Trans. Commun., vol.36, no.4, pp.389–400, April 1988. [9] Y. Yasuda and K. Kashiki, "High-rate punctured convolutional codes for soft decision Viterbi decoding," IEEE Trans. Commun., vol.COM-32, no.3, pp.315–319, March 1984. [10] J.G. Proakis, Digital communications, Fourth ed., McGraw-Hill. 2001. [11] H. Van Khuong and H.-Y. Kong, "Performance analysis of cooperative transmission under strict power constraints," IEICE Trans. Commun., vol.E89-B, no.3, pp.1007–1011, March 2006. [12] J.N. Laneman, G.W. Wornell, and D.N.C. Tse, "An efficient protocol for realizing cooperative diversity in wireless networks," Proc. IEEE ISIT, Washington, D.C., June 2001.
CiteULike 
Connotea 
Del.icio.us What's this?
This Article 
Abstract
Full Text (PDF)
Alert me when this article is cited
Alert me if a correction is posted
Services
Email this article to a friend
Similar articles in this journal
Alert me to new issues of the journal
Add to My Personal Archive
Download to citation manager
Request Permissions
Google Scholar
Articles by ASADUZZAMAN,
Articles by KONG, H. Y.
Social Bookmarking
What's this?