Zero-Padded Symmetric Conjugate Technique for Intercarrier Interference Cancellation in MIMO-OFDM Systems


A. Yiwleak, C. Pirak, R. Mathar,


        This paper proposes a zero-padded symmetric conjugate self-cancellation technique in orthogonal frequency division multiplexing (OFDM) systems by padding zero in between two consecutive symbols for mitigating intercarrier interference (ICI) caused by a frequency offset in MIMO systems.
The proposed system is not limited to the real-value channels as required in applying ICI cancellation technique in Alamouticoded MIMO systems. The proposed system offers advantages of a symmetric conjugate cancellation scheme and MIMO systems such as efficiently mitigating ICI and enhancement of a diversity gain. The property of symmetric conjugate cancellation is investigated, a technique for ICI cancelling and diversity combining is proposed. Simulation results show that the proposed scheme achieves a lower bit error rate (BER) compared to the ordinary zero-padded MIMO-OFDM systems in AWGN channel. In Rayleigh fading channels, when frequency offset is 1-10%, the proposed system performance, i.e. BER, is significantly improved over the zero-padded conjugate cancellation in MIMO-OFDM systems when the frequency offset is not greater than 10% of subcarrier frequency spacing.

BibTEX Reference Entry 

	author = {Aurupong Yiwleak and Chaiyod Pirak and Rudolf Mathar},
	title = "Zero-Padded Symmetric Conjugate Technique for Intercarrier Interference Cancellation in MIMO-OFDM Systems",
	pages = "1-6",
	booktitle = "3rd International Congress on Ultra Modern Telecommunications and Control Systems 2011 (ICUMT'11)",
	address = {Budapest, Hungary},
	month = Oct,
	year = 2011,
	hsb = hsb999910118701,


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