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While many companies have launched various wireless chargers in mobile industries, conventional wireless power transfer (WPT) technologies are available only for a very short distance due to large attenuation of the magnetic fields. A magnetic beamforming WPT system achieves an enhanced power transfer efficiency (PTE) with a longer wireless charging distance than conventional WPT technologies by adjusting...
While many companies have provided wireless charging technologies to users recently, a charging distance is very short due to a drastic drop of magnetic fields. A lot of researches have been carried out steadily to increase the wireless charging distance. Magnetic beamforming is one of promising technologies to achieve this vision. However, conventional magnetic beamforming schemes require complex...
This article presents a near-field magnetic multi-input multi-output (MIMO) communication system test bed using software defined radio (SDR). We propose a heterogeneous multi-pole loop antenna array for near-field magnetic MIMO system. In this paper, we show improved performance of the proposed near-field magnetic MIMO communication system over a conventional magnetic MIMO system employing a circular...
Beamforming can spatially filter out a jamming signal and effectively obtain the desired directional gain. However, due to side-lobe, blunt beam of main-lobe, fault adaptation, and so forth, a targeted signal can be leaked to a reactive jammer. By sensing the leaked signal power, the reactive jammer concentrates its own power to the frequency band of the targeted signal. To solve this problem, we...
An increasing demand for processing a large amount of data traffic resulted in the necessity of higher data rate of in-vehicle systems. In this regard, the controller area network for high data rate (CAN-HD) improves the data rate and is also compatible with conventional controller area network (CAN) system. To improve the data rate, the CAN-HD uses more bandwidth and allocates its power to the passband...
It is well known that the full-duplex radio can enhance spectrum efficiency compared with half-duplex radio in inter-node interference free environment. However, in real situation, the inter-node interference is inevitable especially in the random access system whose performance is considerably affected by the interference. In this paper, we analyze the full-duplex system in random access scenario...
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