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An Efficient Space-Time Coding Scheme for Time Dispersive MIMO Channels
Electrical Engineering Department, Faculty of Engineering Technology, Albalqa Applied University, Amman, Jordan
- 1 Electrical Engineering Department, Faculty of Engineering Technology, Albalqa Applied University, Amman, Jordan
International Journal of Communications, Network and System Sciences·Volume 05 (2012)·Pages 218–221·Published 18 April 2012·DOI10.4236/ijcns.2012.54028
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Abstract
In this paper, we introduce an efficient space-time coding scheme for time dispersive Multiple-Input Multiple-Output (MIMO) channels. Channel layering and Orthogonal Frequency Division Multiplexing (OFDM) technique are used in the proposed scheme. The proposed scheme is based on maximizing the distance between any two codewords. This is done by inserting an optimized phase shifts between the symbols in the same layer and between different layers. This way leads to the increase of the achieved diversity and coding gains. As a result, the performance of the system will be improved. Simulation results show the efficiency of the proposed scheme compared to the conventional schemes.
KeywordsOFDMFadingSpace-Time CodingDiversityMIMO
- I. E. Telatar, “Capacity of Multi-Antenna Gaussian Channels,” European Transaction on Telecommunications, Vol. 10, No. 6, 1999, pp. 585-595. doi:10.1002/ett.4460100604
- G. J. Foshini and M. J. Gans, “On the Limits of Wireless Communications in a Fading Environment When Using Multiple Antennas,” Wireless Personal Communications, Vol. 6, No. 3, 1998, pp. 311-335. doi:10.1023/A:1008889222784
- V. Tarokh, N. Seshadri and R. Calderbank, “Space-Time Codes for High Data Rate Wireless Communication: Performance Criterion and Code Construction,” IEEE Transaction on Information Theory, Vol. 44, No. 2, 1998, pp. 744-765. doi:10.1109/18.661517
- D. Agrawal, V. Tarokh, A. Naguib and N. Sheshadri, “Space-Time Coded OFDM for High Data-Rate Wireless Communication over Wideband Channels,” IEEE Vehicular Technology Conference, Vol. 3, Ottawa, 18-21 May 1998, pp. 2232-2236.
- S. M. Alamouti, “A Simple Transmit Diversity Technique for Wireless Communications,” IEEE Journal on Selected Areas in Communications, Vol. 16, No. 8, 1998, pp. 1451-1458. doi:10.1109/49.730453
- V. Tarokh, H. Jafarkhani and A. R. Calderbank, “SpaceTime Block Codes from Orthogonal Designs,” IEEE Transactions on Information Theory, Vol. 45, No. 5, 1999, pp. 1456-1467. doi:10.1109/18.771146
- S. Mudulodu and A. Paulraj, “A Transmit Diversity Scheme for Frequency-Selective Fading Channels,” IEEE Global Telecommunications Conference, Vol. 2, San Francisco, 27 November-1 December 2000, pp. 1089-1093.
- S. Alkhawaldeh and Y. R. Shayan, “An Extended SpaceTime Transmit Diversity Scheme for Frequency Selective Fading Channels,” IEEE CCECE Conference, Montreal, 12-15 May 2003, pp. 1663-1666.
- B. Hassibi and B. M. Hochwald, “High-Rate Codes that Are Linear in Space and Time,” IEEE Transactions on Information Theory, Vol. 48, No. 7, 2002, pp. 1804-1824. doi:10.1109/TIT.2002.1013127
- X. Ma and G. B. Giannakis, “Full-Diversity Full-Rate Complex-Field Space-Time Coding,” IEEE Transactions on Signal Processing, Vol. 51, No. 11, 2003, pp. 29172930.
- R. W. Heath Jr. and A. J. Paulraj, “Linear Dispersion Codes for MIMO Systems Based on Frame Theory,” IEEE Transactions on Signal Processing, Vol. 50, No. 10, 2002, pp. 2429-2441. doi:10.1109/TSP.2002.803325
- M. O. Damen, N. C. Beaulieu and J.-C. Belfiore, “A Number Theory Based Dual Transmit Antennas Space-Time Code,” IEEE GLOBECOM Conference, San Antonio, 2529 November 2001, pp. 485-489.