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.
This work investigates the downlink resource allocation (RA) problem in orthogonal frequency division multiplexing (OFDM)-based cognitive radio networks. The objective of this work is to develop a fair RA-algorithm that maximizes the capacity of secondary users (SUs) and in the same time limits the interference caused to the primary users. The fairness condition is formulated as a minimal data condition...
Sensor networks have attracted much attention in the recent years for its wide applications in biology, medicine, security and battlefield, etc. Data gathering is one of the most important operations in wireless sensor networks. In this paper, we present an energy-delay efficient data gathering protocol, SODG, for sensor networks while taking the transmission interference into considerations. The...
The sidelobe canceller (SLC) is widely used for the array processing to suppress interferences located in the sidelobe of the radiation pattern. In the presence of steering vector mismatch, the performance of SLC may suffer from severe degradation due to desired components cancellation. In this paper, a modified approach is developed to improve the robustness against the direction of arrival (DOA)...
Interference is a major limiting factor for wireless communications. When interference is independent and identically distributed (i.i.d.), its statistics is invariant with time. The conventional statistical analysis can be used to mitigate the interferences. However, when the interferences are non-i.i.d., few signal processing techniques are available for mitigating the interferences. The matched...
The current multiple accesses, such as CDMA, are designed for multi-user wireless communication systems in the licensed spectrum, where uncoordinated interferences can be kept to a minimum. On the other hand, the uncoordinated interferences do exist in the unlicensed spectrum, and they compromise the orthogonal properties and hence degrade the performance of the current multiple accesses. In this...
A total rejection of interferences under any noise power is difficult, if not impossible, by current filtering technology. In this presentation, we will show that this is indeed achievable by a new filtering technique that extracts the part of the statistics from the received signals, which depend only on the interferences, not on the signals and noises. The algorithm is blind to the signal and interference...
Over recent years, power control plays a critical role in the cognitive radio (CR) system. Most of existing works considered power control game under the interference temperature constrains which is a side condition. In this paper, we propose a power control algorithm using game theory. We define a new pricing function which can effectively control the network power consumption. This pricing function...
We show that the interference between the slave laser output and the injected light that is reflected from the VCSEL facet can significantly improve the modulation frequency response of injection-locked VCSELs, both experimentally and numerically.
Microturbine generator (MTG) is a complicated thermodynamical and mechanical system that cannot be modeled accurately. There were several advanced method in speed control of MTG, but until now, systematic and effective control method has been still a lack of in the research field of MTG. Anti-interference problem has been not solved due to existing of high frequency converter. Therefore, a novel fuzzy...
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
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.