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 paper proposes a novel indoor-outdoor caching relay system (CRS) and develops the corresponding caching mechanism, which can improve the utilization of wireless resources. It operates in two phases periodically. In Phase I, spectrum resources of the established links between MBS and user equipment (UE) are extracted to support data caching. In Phase II, caching relay system can directly serve...
This paper considers a low-complexity Gaussian Message Passing Iterative Detection (GMPID) method over a pairwise graph for a massive Multiuser Multiple-Input Multiple-Output (MU-MIMO) system, in which a base station with M antennas serves K Gaussian sources simultaneously. Both K and M are large numbers and we consider the cases that K < M in this paper. The GMPID is a message passing algorithm...
We propose a new transmission scheme for MEMO Y channel by combining the antenna selection algorithm with signal space alignment and network coding strategy. This strategy works with more relaxed constraint between M and N. The average symbol error rate of the transmission scheme is analyzed for the multiple-access phase and the broadcast phase respectively. We show that the proposed scheme can provide...
In this paper, we propose a two-stage interference alignment (IA) scheme for the downlink of partially connected heterogeneity networks (HetNets), where the partial connectivity is induced by the path loss and the low transmission power of small cells. Particularly, in the first stage, the macro cell carries out conventional IA with a set of fully connected small cells. We derive the maximum number...
In this paper, we analyze the performance of multiple-input multiple-output (MIMO) dual-hop channel state information (CSI)-assisted amplify-and-forward (AF) relaying system with transmit and receive beam forming (T-R BF) over Rayleigh fading channels. We derive closed-form expressions for the symbol error rate (SER) of M-ary pulse amplitude modulation (M-PAM), M-ary quadrature amplitude modulation...
Sierpinski fractal antennas have been shown to possess highly desirable properties, including the compact size. A general Sierpinski carpet, called the K-Sierpinski carpet, is proposed in this paper. The lowest resonant frequencies and the size reductions of the K-Sierpinski Carpet fractal antennas are studied based on Ansoft HFSS simulations. It is found that the size reductions of the K-Sierpinski...
Given a multiple-antenna source and a multiple- antenna destination, a multiple-antenna relay between the source and the destination is desirable under useful circumstances. In this paper, a spatial multiplexing scheme and a cooperative beamforming scheme have been proposed for a non-regenerative MIMO relay system. In the spatial multiplexing scheme, the MIMO relay channel can be decomposed into several...
Using differential evolution (DE) to optimize the geometric parameters of Yagi-Uda antennas is presented. A method of moments code, based on thin wire molding, is developed for evaluating each of the antenna designs generated by the DE during the optimization process. To illustrate the capabilities of the method, the length and spacing of several Yagi-Uda antennas and V-shape antennas are optimized...
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.