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Date
2008-09Type
- Journal Article
ETH Bibliography
yes
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Abstract
In this paper, multi-input–multi-output orthogonal frequency-division multiplexing (MIMO-OFDM) is considered in the presence of multipath fading and multitone interference (MTI). The MIMO-OFDM system makes joint use of channel coding and orthogonal space–frequency block coding (OSFBC) on the transmit side and iterative processing on the receiver side for robustness and improved performance against the fading and MTI effects of the channel. The new iterative receiver is implemented by either an optimal a posteriori probability (APP) space–frequency detector or a soft-information-aided minimum-mean-squared-error (MMSE) combiner at its front end and a soft-input–soft-output channel decoder at its back end. An approximate error performance analysis is provided for the OSFBC-OFDM system under maximum-likelihood decoding to illustrate the interference mitigation efficiency of the system. Then, the two iterative receivers are compared in terms of their computational complexities and bit error rate (BER) performances. As depicted in the BER graphs, both iterative receivers provide an improvement in performance after only a few detection/decoding iterations. It is also shown that despite its suboptimality, the MMSE receiver has the potential to achieve a BER performance close to that of the APP detector at a significantly lower cost. Show more
Publication status
publishedExternal links
Journal / series
IEEE Transactions on Vehicular TechnologyVolume
Pages / Article No.
Publisher
IEEESubject
probability (APP); minimum meansquared error (MMSE); multi-input–multi-output orthogonal frequency-division multiplexing (MIMO-OFDM); multitone interference (MTI); orthogonal space–frequency block coding (OSFBC); turbo processingOrganisational unit
03608 - Wittneben, Armin (emeritus) / Wittneben, Armin (emeritus)
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ETH Bibliography
yes
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