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Regularized LS Signal Detection for OFDM in Fast Time Varying Channels
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 Title & Authors
Regularized LS Signal Detection for OFDM in Fast Time Varying Channels
Lim, Dongmin;
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 Abstract
The OFDM with LS signal detection performs worse in fast time varying channels as the channel matrix has higher chance of becoming ill-conditioned. Various regularization methods are applied to avoid performance degradation in LS signal detection. In this paper, we proposed a CGLS method with the stopping criteria imposed by the characteristics of the modulation method, which shows performance comparable to that of the optimal LMMSE.
 Keywords
OFDM;fast time-varying channels;ill-conditioned;regularized LS;CGLS;
 Language
Korean
 Cited by
 References
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3.
D. Lim, "Performance improvement of low complexity LS channel estimation for OFDM in fast time varying channels," J. IEEK, vol. 49-TC, no. 8, pp. 25-32, Aug. 2012.

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D. S. Watkins, Fundamentals of Matrix Computations, 3rd Ed., New Jersey: John Wiley & Sons, Inc., 2010.

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T. Hrycak, S. Das, and G. Matz, "Low complexity equalization for doubly selective channels modeled by a basis expansion," IEEE Trans. Signal Process., vol. 58, no. 11, pp. 5706-5719, Nov. 2010. crossref(new window)