Experimental Investigation on the Impact of Polarization Anisotropy on Channel Correlation Matrix

YIN Xue-Feng; HE Yong-Yu; LING Cen; TIAN Li; ZHONG Zhi-Meng

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Experimental Investigation on the Impact of Polarization Anisotropy on Channel Correlation Matrix

YIN Xue-Feng 1, HE Yong-Yu 1, LING Cen 1, TIAN Li 1, ZHONG Zhi-Meng 2

1. College of Electronics and Information Engineering, Tongji University, Shanghai 201804

2. Huawei Technology Company, Xi'an 710075

*Correspondence author

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Funding: Doctoral Fund for New-teacher （No.20090072120015）

Opened online:31 January 2013

Accepted by: none

Citation: YIN Xue-Feng, HE Yong-Yu, LING Cen.Experimental Investigation on the Impact of Polarization Anisotropy on Channel Correlation Matrix[OL]. [31 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4510824

In this contribution, theoretical studies and measurement campaigns are performed for investigating the anisotropic behavior of propagation channels with respect to (w.r.t.) the polarizations of transmitter (Tx) and receiver (Rx) antennas. Under the assumption that the channel impulse response is isotropic w.r.t. the Tx-Rx polarizations, an analytical expression is derived for the polarized-channel correlation matrix, which is further applied to illustrate that the rank of the matrix is tightly upper-bounded by $4$. In addition, channel measurements in typical indoor scenarios with $12$ Tx- and $2$ Rx-polarization orientations are conducted to collect channel impulse responses which are used to compute the eigenvalue spectra of the polarized-channel correlation matrices. The comparison between the theoretical deduction and the empirical results demonstrates that the propagation channels exhibit properties different from the deduction under the channel isotropy assumption, implying that the channel polarization anisotropy exists in the considered indoor environments.

Keywords:Radio propagation channel, channel anisotropy, and channel correlation matrix.

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