Saturday, 10 November 2007

Multipal Input Multipla output Systems ( GNU Radio Implementation)

Channel Performance :- ( AWGN and Rayleigh)

AWGN - Represents Wired communication scenario
Rayleigh - Used for modelling Wireless communication





















We can see at any moment the signal Power (RSSI) can go down upto 40dB. common in Wireless chennals. (reasons like fading effects )


















The MIMO schems can be used to reduce the BER. you can see the result of implementation of the MIMO system on real hardware ( GNU RADIO, SDR) as shown bellow.























Ref :
  1. David Tse,Pramod Viswanath, Fundamentals of Wireless Communication, 2rd ed. Cambridge University Press , 2005.
  2. Andrea Goldsmith, WIRELESS COMMUNICATIONS, 2rd ed. 2004.
  3. W. C. Jakes, Ed., Microwave Mobile Communications, NewYork: Wiley, 1974.
  4. M. Alamonty , A Simple Transmit Diversity Technique for Wireless Communication, 3rd ed. IEEE Journal on selected area in Communication, Vol 16:No 8, 1998.
  5. A. Wittneben, A new bandwidth efficient transmit antenna modulation diversity scheme for linear digital modulation,, 3rd ed. in Proc. 1993 IEEE International Conf. Communications (ICC93), May 1993, pp. 16301634.
  6. J. K. Cavers, An analysis of pilot symbol assisted modulation for Rayleigh fading channels,. IEEE Trans. Veh. Technol., vol. 40, pp.686693, 1991.
  7. S. Sampei and T. Sunaga , Rayleigh fading compensation method for 16 QAM in digital land mobile radio channels, . in Proc. IEEE Vehicular Technology Conf., San Francisco, CA, 1989, pp. 640646.
  8. V. Tarokh, A. Naguib, N. Seshadri, and A. R. Calderbank, Spacetime codes for wireless communication: Combined array processing and space time coding,, . IEEE Trans. Inform. Theory, Mar. 1998.
  9. E.Blossom, Gnu Radio, [Online]. Available: http://en.wikipedia.org/wiki/GNU_Radio [Accessed Feburary 15, 2007].

1 comment:

  1. Can you please upload the python or GRC file for the same? Actually I'm trying to replicate the same figure above (BPSK- AWGN and Rayleigh channels) but not looking alike.
    Thanks

    ReplyDelete