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In this paper, we consider single-link mmWave transmission. We investigate the usual hybrid beamforming architecture under an additional constraint on the analog precoding stage. Namely, for practical reasons only partial interconnection between the antennas and the RF chains is allowed. We present a novel upper bound for spectral efficiency under this architecture constraint. We evaluate the tightness...
Distributed array radar is a significant radar system, which can not only improve radar detection capability and measurement accuracy, but also suppress mainlobe interference effectively. However, due to its equivalent large aperture, the plane wave assumption fails. What's worse, target signals arriving at each array may have the envelope migration problem, thus the traditional adaptive beamforming...
Mobile communication technology has been rapidly evolving ever since its first introduction in the late 1980s. The development witnessed is not just in the refinement of the radio access techniques, but also in the progression towards offering sophisticated features and services to the mobile phone users. To fulfill this ever-growing user demand and market trends, frequency ranges in millimeter wave...
Vector sound intensity can be used to locate sound sources. The typical vector sound intensity array is composed of three pairs of sensors with pairs aligned along orthogonal axes. Each sensor pair provides one of the components of the three dimensional intensity vector which is the time average of the product of the pressure and particle velocity at the center of the sensor pair. In the conventional...
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