Multiple-input multiple-output (MIMO) has been accepted as a promising technology for its potential to achieve low bit error rate (BER) by space time coding [1] or to achieve large capacity by multiplexing [2]. MIMO multiplexing has been widely adopted to realize high speed data communications. The capacity of MIMO systems in the point-to-point transmission without external interferences has be...

The cellular industry is growing quickly but so is the fraud. For instance, based on the surveys conducted by the Cellular Telecommunications Industry Association (CTIA), the number of U.S. cellular subscribers, cell sites, and total revenue have grown 112, 27, and 36 times, respectively, over the past ten years. At least 38.2 million, 14.5% of the entire U.S. population, have subscribed to the...

Superposition coding techniques can be used to improve communications efficiency in a variety of scenarios. These techniques are particularly appropriate for applications in which there are spatial or temporal disparities in received signalto-noise ratios (SNRs). In this paper, we consider the application of superposition coding to increase the system capacity of the forward link in a CDMA cell...

A voiceldata cellular system is studied in this work. Analytical methods are used based on generating functions techniques. An extended simulation analysis it was also carried out, defining the main performance parameters and their impact on system behaviour. The limits or analytical study are investigated and solutions through simulation methods are proposed. 1. INTRQDUCTION UTURE communicatio...

The design of cellular manufacturing system (CMS) involves many structural and operational issues. One of the important CMS design steps is the formation of part families and machine cells which is called cell formation. In this paper, we propose an efficient algorithm to solve a new mathematical model for cell formation in cellular manufacturing systems based on cell utilization concept. The p...

This paper is in search of designing the cellular manufacturing systems (CMSs) under dynamic and flexible environment. CM is proper for small-to-medium lot production environment that helps the companies to produce variable kind of productions with at least scraps. The most important benefits of CM are decline in material handling, reduction in work-in-process, reduction in set-up time, increme...

one of the most effective techniques to mitigate multipath fading and inter-cell interference at a downlink wireless channel in wcdma systems for achieving high capacity is transmitter power control. in this case, system increases the power of the subscriber when its interference increases in order to satisfy the requested signal qualities. however, when the requested signal qualities are infea...

specific and non- specific cellular immune responses were studied in 20 amoebiasis cases and 10 controls. all the study cases and controls were indians living in varanasi, india. ten amoebic liver abscess cases were patients admitted to university hospital. ten non-invasive intestinal amoebiasis cases constituted the second study group. non-specific immune responses were studied using e-rosette...

In this paper, we present a simulated annealing (SA) and a genetic algorithm (GA) based on heuristics for scheduling problem of jobs in virtual cellular manufacturing systems. A virtual manufacturing cell (VMC) is a group of resources that is dedicated to the manufacturing of a part family. Although this grouping is not reflected in the physical structure of the manufacturing system, but machin...