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, a new adaptive resource allocation and grouping scheme is proposed to enhance the capacity of device-to-device (D2D) systems underlaying cellular networks. In order to increase resource utilization, we propose to divide the outer region of the cell into multiple parts and the corresponding D2D pairs located in the symmetrical parts are designed to reuse the same cellular user equipment's...
We investigated the adaptive power allocation in an point-to-point orthogonal frequency Division multiplexing (OFDM) cooperative system subject to the individual power constraint with an objective of maximize the sum transmission rate, and derived the optimal power allocation by assuming independent and identically distributed (i.i.d.) sub-channels in each Decode-and-Forward (DF) relay. To improve...
In recent years, a new computing paradigm, cloud computing, has received a significant attention. The large scale data processing is easily obtained by utilizing the underlying programming model named MapReduce. According to the previous researches, one of the key challenges to the MapReduce performance is determining the appropriate number of mappers and reducers allocated to cluster nodes in a cloud...
An ideal Network Processor, that is, a programmable multi-processor device must be capable of offering both the flexibility and speed required for packet processing. But current Network Processor systems generally fall short of the above benchmarks due to traffic fluctuations inherent in packet networks, and the resulting workload variation on individual pipeline stage over a period of time ultimately...
Hybrid relay systems using Amplify-and-Forward protocol (AF) and Decode-and-Forward protocol (DF) together are introduced in cooperative networks. For hybrid systems, we propose adaptive relay selection scheme to maximize the overall received Signal to Noise Ratio (SNR) at the destination. At first two relays are selected among many according to the instantaneous channel conditions. One is a relay...
With this enormous speed in generating and collecting images, there is an extreme need in extracting interesting and useful knowledge from image archives. In our previous works, we have proposed an image mining framework to extract knowledge from a sequence of images. The framework is composed of two main modules: image analysis and knowledge processing. In this paper, we successfully customized the...
Datasets of tens of gigabytes are becoming common in computational and experimental science. Providing remote visualization of these large datasets with adequate levels of quality and interactivity is an extremely challenging task, particularly for scientists who collaborate in widely distributed locations and their primary access to visualization resources is a desktop computer. This paper describes...
In this paper, we propose a robust STBC transmission scheme to combat the timing synchronization errors over frequency-selective multiple-access channels. First, the equivalent channel model in the presence of timing synchronization errors is derived and we find that the synchronization errors result in an equivalent channel model with larger number of correlated channel taps. Based on this correlated...
Some communication applications, like multimedia, deliver data of different importance classes allowing unequal error protection (UEP) levels. In this paper, a multiple-input multiple-output (MIMO) system using orthogonal frequency division multiplexing (OFDM) is considered with a new UEP bit-loading algorithm based on the non-UEP algorithm by Chow, Cioffi, and Bingham. In the proposed bit-loading...
This paper explores the attributes, layering models and objective functions in cross layer designs for mobile ad hoc wireless networks by taking all the statistical characteristics and constraints from the physical (PHY) layer, media access control (MAC) layer and network (NET) layer into consideration. This paper reviews the entire network optimization across all the PHY/MAC/NET layers. At the PHY...
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.