The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, we present an interference problem due to the synchronization sequence collision between adjacent nodes in heterogeneous network environment. One of the possible solutions for the synchronization sequence collision is to newly define some kinds of synchronization sequences in system configuration. From this point of view, we propose an effective sequence generation method and suggest...
Cognitive ultra wideband wireless communication system as a new type of intelligent communication system will be utilized with a variety of techniques, now research focuses on the generation and detection of short RF pulses. Prolate spheroidal wave function possess many desirable properties, such as high energy concentration and inherent Orthogonal properties, which is important because the regulatory...
In this paper, we use Matlab Truetime to investigate the performance of the PID algorithm in wireless networked control systems (WNCS) under packet loss condition. Then we propose a approach to deal with the unpredictable packet loss problem in WNCS.
In this paper, we analyze downlink coverage probability and mean achievable rate of two — tier networks (macrocell and femtocell) where femtocells are assumed to be grouped and majority of these groups are located in the annular region of macrocell coverage area. To analyze this model, we use high-order cluster point process. Finally, the performance is discussed numerically.
Recent advances in communication technology have demonstrated the feasibility of full-duplex communication for a node to simultaneously transmit and receive on the same frequency band. Although the full-duplex technique has the potential to double the capacity of point-to-point wireless links, the resource allocation in multi-user environment becomes more complicated due to user-dependent channel...
We present the indoor positioning system applying the multi-level TSS(Transmission Signal Strength) technique based on the RSS(Received Signal Strength) positioning algorithm and the Zigbee wireless communication modules. Especially, the Probabilistic algorithm is effectively adaptable for indoor spaces are applied to the suggested position system to increase the reliability for the position accuracy.
In this paper, we propose a new system for discovery in device to device networks. The new scheme is based on the interleaved-division multiple access and outperforms the conventional single-user detection and successive interference cancellation decoding.
Vehicle to Vehicle(V2V) is an important communication medium for safety and comport of drivers. Accordingly, V2V researches based on IEEE 802.11p standard is being actively investigated in many countries. V2V researches which is fors and againsts per each study from many simulation as well as the vehicle test is being conducted. Among them, we especially need to use NS2 which is simulator similar...
Application of nanotechnology is very diverse, ranging from electronics, optics, photonics, communication, medicine, sensing, biotechnology and biomaterials, and to energy production. This emerging technology is capable of creating many new materials and devices in nanoscale with a vast range of above applications. It is well established that many materials with minimum dimensions on the nanoscale...
This paper investigates general Z-hop cascaded undirected wireless relay network, where the source, the relays, and the destination form an undirected chain, and each node receives radio waves from its two neighboring upstream and downstream nodes in the chain. We focus on the effect of time-division duplex and hidden-terminal constraints from two aspects: 1) finding all feasible network states (FNS)...
In this paper, we investigate precoding and limited feedback schemes for multiuser multi-input multi-output (MIMO) relay systems providing physical layer security. Thereby, we take the effect of the quantized channel state information (CSI) into account for relay precoder optimization. With the quantized CSI available, the relay station (RS) optimizes its precoder by maximizing the transmit power...
The spectacular success of MIMO systems may be attributed to the fact that the MIMO capacity increases linearly with the number of transmit antennas, provided that the number of receive antennas is equal to the number of transmit antennas. With the further proviso that the total transmit power is increased proportionately to the number of transmit antennas, a linear - rather than logarithmic - capacity...
Wired and wireless seamless networks comprised of optical fiber and radio-wave links can provide high-speed, resilient and flexible broadband services, where one of important items is precise and high-speed control of lightwave based on advanced photonic technologies such as digital coherent, high-speed electro-optic conversion, radio-over-fiber, etc. This talk focuses on such photonic devices for...
The objective of this presentation is to illustrate that an electromagnetic macro modeling can properly predict the path loss exponent in a mobile cellular wireless communication. This represents the variation of the path loss with distance from the base station antenna. Specifically, we illustrate that the path loss exponent in a cellular wireless communication is three preceded by a slow fading...
Two novel recursion constructions of mutually orthogonal complementary pairs (MOCPs) are respectively presented on the basis of concatenation and interleaving operations. For the proposed set consisting of MOCPs, the zero-shift cross-correlation function between any two complementary pairs is equal to zero, that is, all of complementary pairs in MOCPs set are orthogonal to each other, as suggested...
Frequency reuse improves system capacity but sacrifices cell-edge user equipments (UEs) due to inter-cell interference. To solve this problem, fractional frequency reuse (FFR) was proposed, which ameliorates cell-edge UEs by using a larger reuse factor for them than for cell-center UEs. In this paper, we investigate a common type of FFR schemes, called partial frequency reuse (PFR), and find that...
We have constructed an underwater wireless power transfer system for the swimming robot fish using a coupled resonator WPT technique. The WPT systems are usually affected by dielectric material, the resonant frequency being shifted, and the power transfer loss being increased. By use of the primarily magnetic coupling, we have tried to realize a system that is hardly affected by the water. In addition,...
Full duplex communication is able to enhance the spectrum efficiency of wireless channels, one important step of which is the passive suppression technology. To improve the performance of the passive suppression, we have studied different antenna configuration modes, which are based on the electromagnetic interference theory. Making full use of the fading characteristic of antennas, we figure out...
For the first time, fully gravure printed wireless cyclic voltammetry (CV) tag is reported as a platform for the disposable wireless sensor tags by utilizing Ag nano-particle based conducting ink, BaTiO3 nano-particle based dielectric ink and single-walled carbon nanotube based semiconducting ink. The printed CV tag contains four functional units for the disposable wireless sensor tag: the rectenna...
Transceiver-free object localization is essential for emerging location-based service, e.g., the safe guard system and asset security. It can track indoor target without carrying any device and has attracted many research effort. Among these technologies, Radio Signal Strength (RSS) based approaches are very popular because of their low-cost and wide applicability. In such work, usually a large number...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.