[1] Xu Xiaodong, Jing Ya, You Xiaohu,. MDL-based root-mean-squared delay spread estimationfor MIMO OFDM systems [J]. Journal of Southeast University (English Edition), 2004, 20 (4): 395-400. [doi:10.3969/j.issn.1003-7985.2004.04.001]

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MDL-based root-mean-squared delay spread estimationfor MIMO OFDM systems()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

20

Issue:

2004 4

Page:

395-400

Research Field:

Information and Communication Engineering

Publishing date:

2004-12-30

Info

Title:

MDL-based root-mean-squared delay spread estimationfor MIMO OFDM systems

Author(s):

Xu Xiaodong;  Jing Ya;  You Xiaohu

National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Keywords:

multi-input multi-output orthogonal frequency division multiplexing(MIMO OFDM);  root-mean-squared(RMS)delay spread(RDS);  frequency-selectivity;  noise variance;  minimum description length criterion

PACS:

TN929

DOI:

10.3969/j.issn.1003-7985.2004.04.001

Abstract:

This paper studies the application of minimum description length(MDL)criterion for estimating root-mean-squared(RMS)delay spread(RDS)for MIMO OFDM systems. The analytic relationship between the powers and the correlation matrix of multipath components establishes the feasibility of the application of the MDL criterion to RDS estimation. The estimator presents both the estimate of instantaneous RDS and the estimates of noise variance, channel power and SNR of current channel with low computational complexity. Given the powers of the estimated multipath components, the MDL criterion is adopted to acquire the number of paths and the time delays of each path of current channel without making eigendecomposition of the correlation matrix normally required by MDL criterion, following which the noise variance and the power of each path can be estimated. The power delay profile(PDP)and RDS of the current channel are achieved. Simulation results show that the proposed estimator is insensitive to variance of SNR and robust against frequency-selectivity.

References:

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Memo

Memo:

Biographies: Xu Xiaodong(1975—), male, graduate; You Xiaohu(corresponding author), male, doctor, professor, xhyu@seu.edu.cn.

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