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2010
IEEE

On Non-Stationary Urban Macrocell Channels in a Cooperative Downlink Beamforming Scenario

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On Non-Stationary Urban Macrocell Channels in a Cooperative Downlink Beamforming Scenario
—A common simplification in the treatment of random linear channels is the assumption of stationarity of the channel in time. The wireless channel is, however, known to be inherently non-stationary. We detail a methodology for non-stationarity analysis from an algorithmic perspective. For the determination of local quasi-stationarity regions, we consider a multi-link downlink scenario where multiple base stations use transmit beamforming to concurrently transmit to a single mobile terminal per time slot. We obtain an algorithm-specific measure, i.e., the signal-to-interference-plus-noise ratio (SINR) degradation, with which we evaluate local quasi-stationarity regions. Furthermore, we relate and compare the SINR degradation to the correlation matrix distance (CMD). In an urban macrocell scenario relevant to 3GPP Long Term Evolution (LTE), we find that the resulting local quasi-stationarity distances show the same trends, but that the CMD overestimates the average distances for our...
Adrian Ispas, Gerd Ascheid, Christian Schneider, R
Added 31 Jan 2011
Updated 31 Jan 2011
Type Journal
Year 2010
Where VTC
Authors Adrian Ispas, Gerd Ascheid, Christian Schneider, Reiner S. Thomä
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