Abstract—Wireless link in mobile cellular communication system is experienced by large and small scale fading. Since the link is Non Line of Sight (NLOS), therefore, severely affected by multipath fading. Adaptive equalizer is a widely used technique to neutralize the effect of multipath fading. In this paper, Frequency Domain Adaptive Filer (FDAF) and Least Mean Square (LMS) algorithms are used to combat the effect of multipath fading for 16-QAM and QPSK modulated wave and the results are shown using constellation diagram and bit error rate (BER). Finally, a comparison is made between two algorithms in contexts of process time, mean BER, variance of BER and circuit complexity.
Index Terms—Mobile cellular communications, fading channel, channel equalization, adaptive equalizer.
Md. Imdadul Islam, Md. Ariful Islam, Nur Mohammad and Mahbubul Alam are with the Computer Sciencen and Engineering Department, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh.
M. R. Amin is with the Department of Electronics and Communications Engineering, East West University, 43 Mohakhali, Dhaka 1212, Bangladesh(corresponding author, phone: +880-1715296735; fax: +880-2-8812336;e-mail: ramin@ ewubd.edu).
Cite: Md. Imdadul Islam, Md. Ariful Islam, Nur Mohammad, Mahbubul Alam and M. R. Amin, "Comparison of LMS and FDAF Algorithms in Equalization of Fading Channel," International Journal of Engineering and Technology vol. 3, no. 1, pp. 16-21, 2011.