Improving space-time-frequency MIMOOFDM with ICI self-cancellation scheme using least square error estimator / Nur Farahiah Ibrahim, Zahari Abu Bakar and Azlina Idris

Ibrahim, Nur Farahiah and Abu Bakar, Zahari and Idris, Azlina (2015) Improving space-time-frequency MIMOOFDM with ICI self-cancellation scheme using least square error estimator / Nur Farahiah Ibrahim, Zahari Abu Bakar and Azlina Idris. Scientific Research Journal, 12 (1). pp. 25-37. ISSN 1675-7009

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Abstract

Channel estimation techniques for Multiple-input Multiple-output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) based on comb type pilot arrangement with least-square error (LSE) estimator was investigated with space-time-frequency (STF) diversity implementation. The frequency offset in OFDM effected its performance. This was mitigated with the implementation of the presented inter-carrier interference selfcancellation (ICI-SC) techniques and different space-time subcarrier mapping. STF block coding in the system exploits the spatial, temporal and frequency diversity to improve performance. Estimated channel was fed into a decoder which combined the STF decoding together with the estimated channel coefficients using LSE estimator for equalization. The performance of the system was compared by measuring the symbol error rate with a PSK-16 and PSK-32. The results show that subcarrier mapping together with ICI-SC were able to increase the system performance. Introduction of channel estimation was also able to estimate the channel coefficient at only 5dB difference with a perfectly known channel.

Item Type: Article
Creators:
CreatorsEmail
Ibrahim, Nur Farahiahnurfarahiahibrahim@salam.uitm.edu.my
Abu Bakar, ZahariUNSPECIFIED
Idris, AzlinaUNSPECIFIED
Subjects: Q Science > QA Mathematics > Error analysis (Mathematics). Theory of errors. Least squares
T Technology > TK Electrical engineering. Electronics. Nuclear engineering > Telecommunication > Wireless communication systems. Mobile communication systems. Access control > Orthogonal frequency division multiplexing
Divisions: Institute of Research Management and Innovation (IRMI)
Journal or Publication Title: Scientific Research Journal
ISSN: 1675-7009
Volume: 12
Number: 1
Page Range: pp. 25-37
Item ID: 13582
Uncontrolled Keywords: Inter-carrier interference self-cancellation (ICI-SC), Multipleinput Multiple-output (MIMO), Orthogonal Frequency Division Multiplexing (OFDM), channel estimation, Least-square Error (LSE).
Last Modified: 30 May 2016 06:10
Depositing User: Staf Pendigitalan 1
URI: http://ir.uitm.edu.my/id/eprint/13582

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