volume | PIER Journals

Abstract

ℜMulti-carrier system has been fuelled by large demand on frequency allocation, resulting in a crowded spectrum as well as large number of users requiring simultaneous access. Existing wireless systems may be utilized single frequency, single antenna and pulse for carrier transmission and reception. Problems of such system is that in case of failure the total system will become non operational. So we established a distributed system in terms of multi-carrier, multi-antenna and coded pulse can provide a more suitable communication and sensor gives rise to DSSS-OFDM-MIMO based hybrid technology is the ultimate solution. This technology is a promising technique for high-data-rate broadband wireless communications and radar because it can reduce interference, multipath effect, jamming and higher target resolution as compared to conventional communication & radar etc. The proposed techniques improve the performance of OFDM, DSSS and MIMO based wireless communications and sensing for ITS and other applications. Finally this system can be implemented using Software defined Radio to get continuous connectivity of the system.

1. Jakes, W. C., Microwave Mobile Communications, Wiley, 1974.

2. Winters, J., "On the capacity of radio communication systems with diversity in a Rayleigh fading environment," IEEE Journal on Selected Areas in Communications, Vol. 5, 871-878, 1987.
doi:10.1109/JSAC.1987.1146600

3. Foschini, G. J., "Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas," Bell Labs. Tech. Journal, Vol. 1, No. 2, 41-59, 1996.
doi:10.1002/bltj.2015

4. Foschini, G. J. and M. J. Gans, "On limits of wireless communications in a fading environment when using multiple antennas," Wireless Personal Communications, Vol. 6, No. 3, 311-335, Mar. 1998.
doi:10.1023/A:1008889222784

5. Jankiraman, M., Space-time Codes and MIMO Systems, Artech House, 2004.

6. Vucetic, B. and J. Yuan, Space Time Coding, John Wiley & Sons Inc., 2003.

7. Paulraj, A. J. and T. Kailath, Increasing capacity in wireless broadcast systems using distributed transmission/directional reception, U. S. Patent No. 5345599, 1994.

8. Raleigh, G. G. and J. M. Cioffi, "Spatio-temporal coding for wireless communication," IEEE Trans. Commun., Vol. 46, No. 3, 357-366, 1998.
doi:10.1109/26.662641

9. Bolcskei, H., D. Gesbert, and A. J. Paulraj, "On the capacity of OFDM-based spatial multiplexing systems," IEEE Trans. Commun., Vol. 50, No. 2, 225-234, Feb. 2002.
doi:10.1109/26.983319

10. Telatar, I. E., "Capacity of multi-antenna Gaussian channels," Eur. Trans. Telecomm., Vol. 10, No. 6, 585-595, 1999.
doi:10.1002/ett.4460100604

11. Bolcskei, H., A. J. Paulraj, and Ch., "Multiple-input multiple-output (MIMO) wireless systems," The Communications Handbook, 90.1-90.14, CRC Press, 2002.

12. Fishler, E., A. Haimovich, R. Blum, L. Cimini, D. Chizhik, and R. Valenzuela, "MIMO radar: An idea whose time has come," Radar Conf. 2004, Proc. of the IEEE, 71-78, Apr. 2004.

13. Fishler, E., A. H. Haimovich, R. S. Blum, L. Cimini, D. Chizhik, and R. Valenzuela, "Spatial diversity in radars --- Models and detection performance," IEEE Trans. on Signal Processing, Vol. 54, No. 3, 823-838, Mar. 2006.
doi:10.1109/TSP.2005.862813

14. Foschini, G. J. and M. J. Gans, "On limits of wireless communications in a fading environment when using multiple antennas," Wireless Personal Communications, Vol. 6, No. 3, 311-318, Mar. 1998.
doi:10.1023/A:1008889222784

15. Foschini, G. J. and M. J. Gans, "On limits of wireless communications in a fading environment when using multiple antennas," Wireless Personal Communications, Vol. 6, 311-335, 1998.
doi:10.1023/A:1008889222784

16. Van Nee, R. and R. Prasad, OFDM for Wireless Multimedia Communications, Artech House, 2000.

17. Prasad, R., Universal Personal Communication, Artech House, 1998.

18. Xiang, Waters, Bratt, Barry, and Walkenhorst, "Implementation and experimental results of a three-transmitter three-receiver OFDM/BLAST testbed," IEEE Communication Magazine, 2004.

19. "NTT DoCoMo successfully completes 4G mobile communications experiment including 100 Mbps transmission,", Vol. 1, No. 11, nG Japan, InfoCom Research Inc., Tokyo, Japan, Nov. 25, 2002.

20. Foschini, G. J. and M. J. Gans, "On limits of wireless communications in a fading environment when using multiple antennas," Wireless Personal Communications, Vol. 6, 311-335, 1998.
doi:10.1023/A:1008889222784

21. Sinha, N. B., D. Kandar, R. Bera, and S. K. Sarkar, "Experimental studies and simulations based prediction of a better MIMO-OFDM combined system for broad band mobile and wireless communication," Progress In Electromagnetics Research C, Vol. 2, 47-64, 2008.
doi:10.2528/PIERC08022809

Dr. Nirmalendu Sinha

Professor Rabindra Nath Bera

Dr. Monojit Mitra