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Fuzzy Approach based two Layered Block Coded Adaptive MC-CDMA system with FT/ST

Author Affiliations

  • 1School of Engineering and Applied Sciences, ISRA University, Islamabad, Pakistan
  • 2School of Engineering and Applied Sciences, ISRA University, Islamabad, Pakistan
  • 3Department of Department of Electrical Engineering, University of Lahore, Islamabad Campus, Pakistan
  • 4School of Engineering and Applied Sciences, ISRA University, Islamabad, Pakistan

Res. J. Recent Sci., Volume 5, Issue (3), Pages 50-57, March,2 (2016)


The adaptive systems have been employed in nearly all future networks like 4G LTE, 5G etc in order to effectively utilize the available bandwidth, minimize bit error rate (BER) and get better convergence rate, etc. In this paper, least mean square (LMS) algorithm with adaptive step size has been applied on layered space time block coding (LSTBC) based multi-carrier code division multiple access (MC-CDMA) system. This system is studied for both transformations: Fourier transform (FT) and Slantlet transform (ST). Fuzzy rule base scheme (FRBS) has been applied for adaptation of step size. It is observed that convergence rate of proposed FRBS based MC-CDMA receiver is attractive as compare to conventional LMS receiver. Further, it has been seen that bit error rate (BER) of proposed FRBS based MC-CDMA system is better than conventional LMS receiver in both transformations mechanism FT and ST. Moreover, FRBS based MC-CDMA system with ST gives overall attractive BER.


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