—Orthogonal frequency division multiple access (OFDMA) is a multiuser of digital modulation technique used to increase wireless transmission rate. Signal efficiency is distorted due to Inter symbol interference (ISI) that occurs due to the multipath propagation. Cascaded Least Square (CLS) with Decision Feedback Equalizer (DFE) had been used in this research in order to mitigate ISI in OFDMA system. CLS is combination of two adaptive algorithms which are Least Mean Square (LMS) and Recursive Least Square (RLS). This research also justified that combination of space time frequency block code (STFBC) with multiple input multiple output (MIMO) antenna enable to minimize ISI. The simulation results show the improvement of bit error rate (BER) performance after reducing ISI and also prove that STFBC was able to achieve maximum diversity order in the MIMO OFDMA system.
—Least mean square (LMS), recursive least square (RLS), cascaded least square (CLS), decision feedback equalizer (DFE).
The authors are with the Faculty of Electrical Engineering, UiTM Shah Alam, Malaysia (e-mail: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org).
Cite:Siti Maisurah Sulong, Azlina Idris, and Suzi Seroja Sarnin, "Performance Evaluation of CLS-DFE for MIMO OFDMA System," Journal of Advances in Computer Networks vol. 4, no. 2, pp. 107-110, 2016.