期刊
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
卷 58, 期 7, 页码 3867-3873出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVT.2009.2016974
关键词
Frequency-domain equalization (FDE); Kalman filtering; multiple-input-multiple-output (MIMO); normalized recursive least squares (NRLS); Turbo channel estimation
资金
- Overseas Research Students Award Scheme U. K
- EPSRC [EP/E026915/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E026915/1] Funding Source: researchfish
We investigate soft-input Turbo channel estimation for multiple-input-multiple-output (MIMO) systems with single-carrier (SC) frequency-domain equalization (FDE), based on the Kalman filtering and normalized recursive least-squares (NRLS) criteria. Under each criterion, structured channel estimation (SCE) is developed, which exploits the correlation between adjacent frequency bins, and achieves a close performance to the case with perfect channel state information (CSI). An intensive performance analysis is provided in terms of the mean square error (MSE) of channel estimation, which provides a good match with the numerical results. Given a practical channel model for wireless communications, Turbo NRLS SCE (TNRLS-SCE) outperforms Turbo Kalman SCE (TK-SCE) in terms of the steady-state MSE, with a wide range of root-mean-square (RMS) delay spreads and a medium-to-high Doppler spread.
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