Adaptive switching between multiple-input multiple-output (MIMO) transmission strategies like diversity and spatialmultiplexing is a flexible approach to respond to channel variations. It is desirable to obtain accurate estimates of the switching points between these transmission schemes to realize the capacity gains made possible by adaptive switching. In this paper, it is shown that the accur...

Transmission performance of a multi-input multi-output (MIMO) antenna system (i.e., antenna diversity, adaptive antenna array, and space division multiplexing) highly depends on the arrival angle distribution of propagation paths. In this letter, a multipath fading simulator based on distributed scattering model is presented. The impacts of the arrival angle distribution of propagation paths on...

PREFACE An adaptive array antenna technology is paid attention to a lot of applications in the next generation wireless mobile communications. This technology can form a beam pattern at an intended direction by applying digital signal processing algorithms to the digitized signals from each antenna element. It has had some barriers in commercial uses due to implementation complexities and impra...

We investigate the different dominant propagation mechanisms in an urban macroand microcellular base station (BS) installation with a special focus on the application of smart antennas by means of adaptive antenna array measurements. We demonstrate that the congruence of the geometrical mobile station (MS) position and the dominant direction of arrival is only fulfilled for macrocellular BS ins...

This paper describes the design of a compact, dual GPS frequency L1/L2, multi element adaptive antenna array, where each array element is comprised of an aperture coupled spiral slot array. In short, it is an array of arrays. The design of a seven element array is described. The design is quite different from existing CRPA antennas which use a stacked patch approach. The aperture coupled spiral...

The demand for increased capacity in wireless communication networks has motivated recent research activities toward wireless systems that exploit the concept of smart antenna and space selectivity. Efficient utilization of limited radio frequency spectrum is only possible to use smart/adaptive antenna system. Smart antenna radiates not only narrow beam towards desired users exploiting signal p...