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In this paper, as a basic study for combination of turbo equalizer and 4D-8PSK-TCM (4 Dimensional 8 Phase Shift Keying Trellis Coded Modulation) system, which is recommended for X-band band satellite communication in CCSDS, a system combining 8PSK-TCM system and turbo equalizer has been designed and performance evaluation of the system has been performed. BER performance of 8PSK and 8PSK-TCM systems...
When using a high power amplifier(HPA) for high-speed communication, the nonlinear characteristics of the HPA cause power efficiency, bit error rate(BER) performance, and spectral efficiency to deteriorate. Since it is inevitable to use HPA to obtain sufficient transmission power for high-speed communication, it is necessary to compensate for nonlinearity of HPA by using a predistorter. In this paper,...
This paper analyzes energy cost reduction from peak demand shaving when a CES provider adopts ESS for the CHP-based CES microgrid site in Seoul, Korea. The simulation results show that about 9% of peak shaving can be realized when a 270kWh ESS is used for three thousand CES households. When two or three ESSs are adopted, peak demand shaving increases at most into 12% or 14%, which concludes that ESS...
The energy consumption in residential section accounts for over 30% of the world and cost-effective indoor energy management is important. Visible light communication based on variable pulse position modulation (VPPM) is a scheme for efficient and convenient indoor energy management. This paper proposes methods for detecting dimmable packet. First, we describe a method based on correlation bank expanding...
ITU-R M.1842-1, which is one of the renowned specification for VHF data exchange system (VDES) devoted to maritime mobile applications, has been standardized wireless transmission protocols according to the peculiar characteristics of a maritime communications scenario. Generally, in the Annex-4 of ITU-R M.1842-1, the VHF data link protocols for maritime mobile services are described along with a...
A parallel feeding circuit is usually adopted to increase impedance bandwidth, in return for achieving wide bandwidth, radiation efficiency diminishes at special frequency usually. The reason of efficiency null exist was presented by analyzing the current mode in feeding structure. This study has important implications to designs of efficiency enhanced wideband antenna using magnetic coupling with...
To provide an emergency alert signaling to digital receiving devices such as Set-Top Box(STB), The Emergency Alert signaling (EAS) framework is required to allow cable operators to disseminate emergency alert information related to emergencies and warnings rapidly. However, most existing devices do not comply with the EAS requirements because it was regarded as an optional function for handling EAS...
In the near future, Peer-to-Peer (P2P) energy trading is expected to contribute potentially in expanding popularity of small-scale Distributed Energy Resources (DERs). This will arguably create new markets (a new business model). Storing energy for future use is still considered to be an expensive solution. Therefore, establishing a cooperative network among the energy producers and consumers would...
Study on the design of a robust network against malicious attacks has gained increased interest in various areas such as wireless communications networks. One of the main obstacles towards finding the optimum robust network is the large number of possible network configurations. In this paper, we propose a novel method to design robust networks against malicious attacks based on the network degree...
Face sketch synthesis plays an important role in both law enforcement and digital entertainment. The existing methods for sketch synthesis always suffer from noising and blurring effect. To resolve these problems, a nonsubsampled Shearlet transform (NSST) based detail enhancement strategy is proposed. The exemplar-based method is firstly adopted to synthesize the primary sketch, then the final sketch...
The vehicle digital cockpit system aims to provide driving information, diagnostic information, and convenience information of a vehicle to a driver in real time through digital display devices. The analog cockpit system is hard to change the layout due to its hardware-specific features. In contrast, the digital cockpit system can selectively provide various information suitable for the driving situation...
In this paper, we try to recognize negative emotions (sadness and disgust) of human affecting driving by using physiological signals that are commonly used to deal with human emotions. To do this, emotional stimuli are used to induce sadness and disgust, and emotion recognition is performed based on the feature vector extracted from the physiological signals collected on the induced emotion by a stimulus...
As the demands of the spectrum allocation for new wireless applications are highly increasing, it comes into the spotlight to use the spectrum bands which remain unused to prevent unwanted interferences in adjacent bands. For the harmless utilization of the reserved spectrum bands, it is important to analysis the compatibility between the newly allocated wireless application and the existing wireless...
In the past, most of the drone was developed for military use, but recently it has been rapidly growing into industrial and civilian markets due to its potential to be applied to various fields. The industry of drones is attracting attention as a model of manufacturing and service convergence, creating synergy by converging with information technology and various services. However, the operating time...
This paper describes power amplifier designs based on transformer matching architecture. The power amplifier have been designed in a 40nm CMOS technology, thus targeting automotive radar and millimeter-wave applications. Their operating ranges are 76–81 GHz and the gain is 20.04 dB at center frequency. It provides a saturated output power of 12.5 dBm with the power-added efficiency (PAE) of 15.06%,...
This paper proposes energy management in smart home with solar renewable energy using smart plug and inverter. Through the smart plug, information on all loads in the home is monitored and collected to an energy management center. Load profiles are managed, and the loads are classified dynamically based on the profiles in the center. When a power failure occurs, the multimode solar inverter supplies...
As the essential role of data analysis in obtaining valuable information increases, the importance of acquiring useful data has also increased, especially within an Internet of Things (IoT) era. In this context, proper access control technique is required, because excessive data collection and analysis can lead to security breaches. However, existing access permission/denial binary access control...
Frequency hopping (FH) is widely used in commercial and military communications. The purposes of FH in military communications are anti-jamming and low probability of interception. To implement low probability of detection or interception, FH signals randomly change carrier frequency. There are several kinds of FH detectors for example autocorrelation detector, maximum-likelihood detector and optimum...
Indoor positioning systems have been actively studied so far, and recently, many researchers are adopting Wi-Fi signals for their systems. It is mainly because Wi-Fi networks are prevalent in the indoor environments these days; also it is more efficient than other methods as one can estimate his location by simply comparing current RSS (Received Signal Strength) with the fingerprint of Wi-Fi signals...
Software defined networking (SDN) technology promises a new bright future to IP network. Significant number of SDN researches have been done so far to facilitate network operation and management efficiently. However, until now there are only few frameworks to support emulation, verification, and implementation of the SDN. Mininet is one of the most popular tools because of the openness, cost effectiveness,...
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