A MIMO-OFDM channel estimation approach using time of arrivals

TitleA MIMO-OFDM channel estimation approach using time of arrivals
Publication TypeJournal Article
Year of Publication2005
AuthorsWang, Z. J., Z. Han, and K. J. R. Liu
JournalWireless Communications, IEEE Transactions on
Pagination1207 - 1213
Date Publishedmay.
Keywordsalternating projection, channel estimation, coherent decoding, coherent detection, decoding, Fourier transform, Fourier transforms, MIMO systems, MIMO-OFDM channel estimation, multiple-input multiple-output systems, OFDM modulation, orthogonal frequency division multiplexing systems, probabilistic data association, probability, time of arrivals estimation, time-of-arrival estimation

Channel estimation is critical in designing multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems for coherent detection and decoding. We propose a channel estimation scheme based on time of arrivals (TOAs) estimation. The TOAs are first determined using a variant of probabilistic data association (PDA) and employing the minimum description length principle, then the PDA is augmented by group decision feedbacks to refine the TOA estimates. With the channels of typical urban and hilly terrain delay profiles, simulation results, compared with the alternating projection (AP) and the Fourier transform based methods, show that the proposed scheme provides a promising accuracy-complexity trade-off for MIMO OFDM channel estimation.


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