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- W2028954066 abstract "Polarization diversity has already been considered for implementing a MIMO link in an indoor environment. However, the propagation characteristics play a leading role in the improvement of the channel performance. The objective of this paper is thus to study the possible application of this kind of diversity in a road or railway tunnel. Extensive measurement campaigns have been carried out in a straight arched tunnel and in a frequency band extending from 2.8 to 5 GHz. From the transfer functions between horizontally or vertically polarized elements of the transmitting and receiving virtual arrays, (4,4) MIMO matrices have been deduced. Different linear array architectures were studied, considering or not different polarizations within each array. Channel capacity was calculated assuming either a constant signal to noise ratio (SNR), whatever the array architecture, or a fixed transmitted power. Interpretation of the results is based on the correlation between elements and also on the variation of the SNR in the case of a fixed transmitted power" @default.
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- W2028954066 date "2009-10-26" @default.
- W2028954066 modified "2023-10-01" @default.
- W2028954066 title "On the possibility of applying polarization diversity to MIMO techniques in tunnels" @default.
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- W2028954066 doi "https://doi.org/10.1145/1641804.1641870" @default.
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