Performance Of WF Precoding Combined With LDPC Coding

Abstract -The MIMO system (multiple input multiple output)constitutesa solution to increase the capacity and/or to guarantee the quality of a wireless communication. There are many scheme MIMO making it possible to bring diversity of emission with an aim of making the transmissions robust in a difficult environment of propagation. There are two different approaches to bring this diversity: open-loop system and closed-loop system. A WF precoder is a closed-loop system which increases the capacityof the MIMO channel.In addition, the application of the error correcting codes improves the performances of the transmission. We propose in this article to combine the WFprecoder WF with a code LDPC. This new scheme makes it possible to have better a BER/capacity compromise.

REFERENCES

[1] T.R. Rajaonarison, A.A. Randriamitantsoa, P.A. Randriamitantsoa, � Performance of MIMO precoders and MIMO receivers in term of capacity�, : International Journal of Engineering & Scientific Research, ISSN 2347-6532, Vol.2 Issue 7, pp.111-121, July 2014.

[2] V. Tarokh, H. Jafarkhani �A differential detection scheme for transmit diversity �, IEEE journal on selected areas in communications, Vol. 18, No. 7, pp. 1169 � 1174, July 2000.

[3] R. GGallager., � Low Density Parity Check Code �, Ph.D Dissertation, M.I.T, 1963.

[4] A.Sanderovich, M.Peleg, S.Shamai, � LDPC coded MIMO multiple access with iterative join decoding�, IEEE Transactions in Information Theory, Vol. 51 n�4, pp. 1437-1450 : 2004.

[5] E.Sharon, A.Ashikmin, S.Litsyn, � EXIT functions for binary input memoryless symmetric channel �, IEEE Transactions on Communications, Vol. 54 n�7, pp. 1207 � 1214, Jul. 2006.

[6] D.Reynolds, X.Wang, � Low complexity turbo equalization for diversity channels�, IEEE Transactions on signal processing, Vol. 81 n�5, pp. 989-995 : 2001.

[7] M. Vu, A. Paulraj, � MIMO wireless linear precoding�, IEEE Transactions on signal processing magazine, pp. 86-105 : Sept 2007.