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Multiple-input, multiple-output (MIMO) antenna systems offer capacity benefits over their single-input single-output (SISO) counterparts, thus attracting considerable current research. MIMO performance depends on a wide range of parameters including radiation efficiency, correlation, mutual coupling, matching efficiency and polarization misalignment. No single simulation method has been described...
This work demonstrates that the typical assumption of a receiver with fixed orientation is very inaccurate for predicting the capacity of handheld MIMO wireless devices. It corrects the standard MIMO normalization with the more appropriate reference array normalization for antenna comparisons. It demonstrates significant recovery of the capacity and diversity losses from parallel array element designs...
Design guidance is provided for multiple-input-multiple-output (MIMO) antenna systems on handsets-a strong prospect for next generation wireless devices. Handheld wireless devices are likely to be rotated out of their optimal polarization, thereby experiencing significant power losses. An existing polarization-agile antenna design and a novel four-spoke extension recover significant fractions of the...
This paper compares the channel characterizations and extends to offer predictions of channel capacity in terms of its mean, outage, and peak levels. Each is estimated from Monte Carlo simulations via a modified Saleh-Valenzuela model and directly from parameter probability distributions. Both approaches yield consistent results, which suggest that channels will typically support at least 50% more...
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