Noriaki Miyazaki

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shown by the authors in a previous study. MIMO R-OFDM is implemented in a testbed targeting IMT-Advanced systems and is evaluated in a mobile environment. The antenna spacings are changed, i.e. the correlation coefficients between two antennas are changed, then the validity of MIMO R-OFDM is evaluated. The results of the field experiment reveal that MIMO(More)
This work analyzed the trade-off between the area spectral efficiency and outage user rates in heterogeneous cellular networks with overlapping picocells. We considered two different models for the spectrum allocation and cell association. The first model employs a spectrum overlapping strategy with an SINR-based cell association. The second model avoids(More)