Interference reduction using MMSE-DFE equalizer with one-third ICI-SC STFBC for MIMO-OFDMA system

Adiba, Hanis and Idris, Azlina and Dimyati, Kaharudin and Andriana, Ratna and Kassim, Murizah and Rahman, Ruhani Abdul (2018) Interference reduction using MMSE-DFE equalizer with one-third ICI-SC STFBC for MIMO-OFDMA system. Journal of Telecommunication, Electronic and Computer Engineering, 10 (1-4). pp. 53-57. ISSN 2180-1843,

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Orthogonal frequency division multiple access (OFDMA) allows simultaneous low data rate transmission for several users. However, as one symbol interferes with subsequent symbol, it will produce a phenomenon called intersymbol interference (ISI) which has similar effect as noise and thus making the communication less reliable. Besides that, Doppler spread due to channel time-variation destroys the orthogonality in OFDMA system and degrade the system performance with intercarrier interference (ICI). In order to solve this issue, minimum mean square error-decision feedback equalizer (MMSE-DFE) with one-third (ICI-SC) subcarrier mapping method using space-time-frequency block codes (STFBC) is proposed. The objective is to minimize both ISI and ICI effects by evaluating pairwise error probability (PEP) and bit error rate (BER) performances. From the simulation results, MMSE-DFE with one-third ICI-SC technique shows the best result for MIMO-OFDMA system with 25% improvement of PEP and 4.8% improvement of BER.

Item Type: Article
Funders: Research Management Centre Universiti Teknologi MARA under Excellent fund (Geran Inisiatif Penyeliaan (GIP)) grant number 600-IRMI/GIP5/3(0013/2016)
Uncontrolled Keywords: Intersymbol Interference (ISI); Intercarrier Interference (ICI); Pairwise Error Probability (PEP); Minimum Mean Square Error-Decision Feedback Equalizer (MMSE-DFE)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 08 Oct 2019 03:15
Last Modified: 08 Oct 2019 03:15

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