Title :
Fast time-varying channels in MIMO-OFDM system using different diversity technique
Author :
Idris, Anuar ; Sabry, Manaal ; Abdul Razak, Nur Idora ; Yusof, Azita Laily
Author_Institution :
Fac. of Electr. Eng., Univ. Teknol. MARA (UiTM), Shah Alam, Malaysia
Abstract :
Multiple-input multiple-output (MIMO) technology and Orthogonal Frequency Division Multiplexing (OFDM) combinations provide robust to multipath delay and high data rates in wireless communication. The wireless connection of fast moving platforms leads to high demands for the applied transmission scheme. Therefore, a channel estimation technique using fast time-varying channel is proposed in this paper. The time varying channel may destroy the orthogonality among the subcarrier resulting in Inter-Carrier Interference (ICI). To cope with this problem, the ICI Self-cancellation (ICI-SC) technique is applied in a fast time varying channel using different types of diversity techniques such as space time block code (STBC), space frequency block code (SFBC) and space time-frequency block code (STFBC). Diversity techniques that exploit spatial time and frequency diversity can be designed using OFDM to reduce ICI as it is reliable in achieving maximum diversity. Thus, the objective of this paper is to evaluate BER performance using a Fast Time-Varying channel in MIMO-OFDM with ICI Self-Cancellation scheme using different diversity techniques. The simulation results show that using STFBC, the BER performance is the best compared to SFBC and STBC. In addition to that, ICI can be reduced and maximum diversity order with an efficient bandwidth can be achieved.
Keywords :
MIMO communication; OFDM modulation; channel coding; channel estimation; diversity reception; intercarrier interference; space-time block codes; time-frequency analysis; time-varying channels; BER performance; ICI self-cancellation technique; ICI-SC technique; MIMO technology; OFDM; SFBC; STBC; STFBC; applied transmission scheme; channel estimation technique; diversity techniques; fast time-varying channel; frequency diversity; intercarrier interference; multipath delay; multiple-input multiple-output technology; orthogonal frequency division multiplexing; space frequency block code; space time block code; space time-frequency block code; spatial time diversity; wireless communication; Bit error rate; Block codes; Channel estimation; Frequency diversity; OFDM; Time-frequency analysis; Time-varying channels; Fast Time-varying channel; Inter-Carrier Interference Self-Cancellation (ICI-SC); Space frequency block code (SFBC); Space time block code (STBC); Space time frequency block code (STFBC);
Conference_Titel :
Wireless Technology and Applications (ISWTA), 2013 IEEE Symposium on
Conference_Location :
Kuching
Print_ISBN :
978-1-4799-0155-5
DOI :
10.1109/ISWTA.2013.6688756