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The signal-to-noise ratio (SNR) available at the receiver significantly affects the performance of Car-to-Car (C2C) communication systems. Thus, accurate models to predict the path loss, in particular for non-line-of-sight (NLOS) scenarios, are essential for the development of C2C systems. Since deterministic models are very time-consuming, also fast-computable stochastic models are of great interest...
We evaluate the interference limited spectral efficiency of a small cellular network using measurements with 3 sites at an ISD of 750 m. Each 3-sector site is equipped with cross-polarized panel antennas. We provide an efficient method to estimate the MIMO capacity from the measured data. We then compare the capacities of SISO and 2x2 MIMO with and without interference. At a fixed SNR of 10 dB, our...
We report on measurements at 2.53 GHz with 20 MHz bandwidth in two triple-sectored urban macro-cell deployments in Berlin and Dresden, Germany. These measurements assist the design of multiuser and cooperative transmission and detection techniques promising to reduce the interference in future cellular systems. We study the geometry factor and the Top-N power statistics in the non-cooperative case...
Multi-cellular radio systems are often limited due to the presence of cochannel interference. Proposed physical layer concepts, e.g. coordinated joint transmission and interference rejection combining, try to strengthen the signal while combating the interference. It is well known that base station cooperation yields great capacity improvement for downlink multi-antenna cellular networks. However,...
In this paper, we investigate the polarization characteristics of the multiple-input multiple-output (MIMO) channels. The cross polarization discrimination (XPD) is found to change over time, while its variation in frequency domain is relatively small. The probability density function (PDF) of the XPD follows a Gaussian distribution. Analysis and measurement results show that the polarization preserves...
In this paper, we investigate the correlation characteristics of the multiple-input multiple-output (MIMO) channels based on the outdoor measurement. The correlation coefficients for both co-polarized and cross-polarized channels are studied. Results show that the polarization decorrelation performs better than spatial decorrelation in strong line of sight (LOS) scenario. In non line of sight (NLOS)...
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