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 cognitive radio networks, spectrum sensing plays a crucial role in the discovery of spectrum opportunities for secondary systems (or unlicensed systems). The performance of spectrum sensing is characterized by both accuracy and efficiency, and more importantly the time taken to make a decision and also the complexity involved in doing so. In this work we propose a simple detection technique based...
Voice over Internet Protocol (VoIP) has grown substantially in the past ten years when compared to the public switched telephone network (PSTN) network, a circuit switched system because of its advantages of low cost and flexible advanced digital communication features. VoIP is an application that runs on the internet, and thus acquires its inherent security issues. We will take a closer look at VoIP...
Cognitive Radio (CR) is a promising technology which deals with using vacant spectrum of licensed frequency band opportunistically. In CR Network, route construction must not affect the transmission of Primary User activity. In CR technology challenge of maintaining optimal routes arises due to PU activity and mobility of spectrum resources i.e. CR users. Maintaining optimal routes in Ad-hoc CR network...
Photovoltaic Cell (PV) is an environment friendly source for electric power generation. This is relatively costly as compared to the other available sources of energy. The maximum power point tracking (MPPT) for the PV system application provides PV generated power for all irradiation conditions to have the maximum output power. It results in low per unit cost of power for efficient PV system. MPPT...
In this paper, the methodology for performance assessment of five different detection techniques from spectrum sensing perspective in cognitive radio networks is proposed and implemented using the realistic implementation oriented model (R-model). The signal detection in CR networks under a non-parametric multisensory detection scenario is considered for performance comparison under the presence of...
This paper is for transmission of video data using optical code division multiple access (OCDMA) system over WDM. OCDMA system is proposed for supporting large numbers of subscriber in optical access network. The system performance is analyzed using Modified Double Weight (MDW) Code because it help to decrease the Multiple Access interference (MAI) to great extend at the transmitter side. Also at...
The paper includes the embedded on-board diagnostics system which continuously monitors the system parameters and generates the DTCs (Diagnostics Trouble Codes). The system consists of master-slave communication implemented through CAN network. Sensors are interfaced to slave microcontroller for monitoring various parameters of the system. Master microcontroller produces DTCs to indicate the causes...
This paper presents the design of an ultra wideband slot antenna for MIMO diversity applications. The antenna has an asymmetric rectangular slot to achieve the broad band impedance matching. The simulated band width of the antenna is 3.0 to 12.0 GHz which is beyond the FCC band. For MIMO, the antenna is implemented in four different configurations. To assess the diversity performance, the envelope...
From last several years, complex networks has been widely studied. Structural properties of network have impact on network function and many techniques are evolved to optimize network. Study of network property includes network efficiency, radius, diameter, average distance, and average clustering. All of these parameters have a direct impact on the function of the network. Finding the graph that...
Monitoring, communication and controlling are the main systems which can transform the conventional grid into the Smart Grid. Numeric meter, Availability Based Tariff (ABT) meter is the most important parameter of the Smart Grid. By giving incentives for enhancing input capacity of power generation it enables more consumer load to be met during the peak hours. (ABT) controls the frequency and ensures...
This paper presents new design of artificial magnetic conductor structure along with feed line. 4 × 1 microstrip patch antenna array using AMC improves performance of antenna. AMC structures are used in design low profile antennas. High gain, minimum size and larger band width required for communication system. This leads to design patch antenna array. So this paper presents four element microstrip...
In traditional Online Examination System, only objective type questions are assessed and according to that marks are given to the student. However, this technique lacks the capability of evaluating descriptive answers. In university examinations, there are many types of question included for evaluation of the students. Therefore, the automated system must be capable of evaluating the descriptive answers...
Wireless communication systems are dense compositions of signal processing and VLSI technologies. Due to increase in demand of higher data rate and better quality of services, VLSI design and implementation method for wireless communication becomes more challenging. Multiple-input and multiple-output (MIMO) technique is rapidly increasing in the last decade which provides higher throughput at no additional...
This paper discusses the performance evaluation of the Content Based Image Retrieval (CBIR) system using the optimality in selection of feature vector elements. The performance of the CBIR system may be improved by appropriate analysis of the image. Image analysis is still facing problems related to the detection of the objects. In spite of the noticeable achievements using the part based model, the...
This paper explores method for face detection where skin color models are integrated. In this research work different skin color models are analyzed and integrated to propose new and innovative approaches for face detection. These approaches are combination of uncommon features of most popular color models like YCbCr, YCgCr and HSI. In this study the luminance component is avoided and only chrominance...
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.