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In this paper, we consider a relaying system which employs a single relay in a wireless network with distributed sources and destinations. Here, all source, destination, and relay nodes are equipped with multiple antennas. For amplify-and-forward relay systems, we confirm the achievable sum rate through a joint multiple source precoders and a single relay filter design. To this end, we propose a new...
This paper considers a single-channel pseudo-monopulse tracking receiver system which is capable of processing both aerial vehicle antenna tracking and its downlink data signal reception. In order to obtain the single-channel monopulse ratio (MR) curve near to a conventional three-channel MR curve, we mathematically define two objective functions in terms of minimizing mean squared error. By solving...
In this paper, we proposes a new minimum distance based precoding scheme for closed-loop quasi-orthogonal spacetime block code (QO-STBC) systems. By utilizing the minimum Euclidean distance maximizing criterion, the proposed scheme attains the near-optimal symbol error performance, while allowing lower feedback overhead. In addition, the proposed scheme still guarantees a simple maximum likelihood...
Typically, the radar systems are put into the two categories: phased array radar with closely spaced antenna elements, and multiple-input multiple-output (MIMO) radar with widely separated antennas. In this paper, we first review the detection performance of each radar system and investigate the compromised one, so called directional MIMO radar. Then, we also proposed an enhanced MIMO radar system...
In the case of densely distributed unmanned aerial vehicle (UAV), an inter-node interference degrades the received signal to interference noise ratio (SINR). In this paper, we focused on the interference effects of densely distributed nodes so that variation of transmission efficiency can be numerically analyzed. Simulation results show that the received SINR highly depends on the antenna directivity...
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