On the Cramer-Rao Lower Bound for Spatial Correlation Matrices of Doubly Selective Fading Channels for MIMO OFDM Systems

Xiaochuan Zhao; Tao Peng; Ming Yang; Wenbo Wang

On the Cramer-Rao Lower Bound for Spatial Correlation Matrices of Doubly Selective Fading Channels for MIMO OFDM Systems

Information Theory 2008-11-05 v1 math.IT

Authors: Xiaochuan Zhao , Tao Peng , Ming Yang , Wenbo Wang

Abstract

The analytic expression of CRLB and the maximum likelihood estimator for spatial correlation matrices in time-varying multipath fading channels for MIMO OFDM systems are reported in this paper. The analytical and numerical results reveal that the amount of samples and the order of frequency selectivity have dominant impact on the CRLB. Moreover, the number of pilot tones, SNR as well as the normalized maximum Doppler spread together influence the effective order of frequency selectivity.

Keywords

cramer-rao lower bound spatial correlation matrix doubly selective fading mimo ofdm maximum likelihood estimation frequency selectivity

Cite

@article{arxiv.0811.0433,
  title  = {On the Cramer-Rao Lower Bound for Spatial Correlation Matrices of Doubly Selective Fading Channels for MIMO OFDM Systems},
  author = {Xiaochuan Zhao and Tao Peng and Ming Yang and Wenbo Wang},
  journal= {arXiv preprint arXiv:0811.0433},
  year   = {2008}
}

Comments

6 pages, 8 figures, Submitted to IEEE WCNC'09

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