We present concepts for the implementation of hierarchical graphs, which can be used as basis for the implementation of tools for graphical formal description techniques (gFDT) like SDL or statecharts. Our approach provides a strong modularity of a speciication by a loose coupling between diierent hierarchy levels and it serves for a rapid development of interactive editors for gFDTs by a speci...

The goal of this work is to design and analyze the performance of various multiuser coding and iterative decoding methods for inter-symbol interference(ISI) networks. The introduction of turbo coding and iterative decoding [1] schemes have changed the coding and detection landscape drastically. The research efforts on turbo and turbo-like techniques continue on many fronts including deep-space ...

ABSTRACT The study aims to examine how the communication between children within family relates cultivation of morals for them. theory considered relevant and used in this is Family Communication. In contrast, research method applied using a qualitative descriptive approach. This also uses content analysis techniques from group hadiths that researchers use then be analyzed with focus order impl...

Space-Time Codes represent a key technology for future broadband wireless communication systems. In this paper a class of space-time block codes according to [1] is used which can lead to intersymbol interference (ISI) due to an optimized diversity performance. Therefore ISI compensation is an important task of the decoding process of these codes. Several known ISI compensation methods can be a...

In multiple antenna transmission the multiplexing gain strictly depends on transmit and receive antenna allocation, transmit antenna synchronization and the process used to eliminate the inter channel interference (ICI). Spatial modulation (SM) is a low-complexity scheme for multiple antenna system. The work and research on Spatial Modulation shows that SM is useful to achieve the multi block-c...

Near Field Communication (NFC) is a Radio Frequency (RF) technology that allows data to be exchanged between devices that are in close proximity. An NFC-based mobile coupon (M-coupon) is a coupon that is retrieved by the user from a source such as a newspaper or a smart poster and redeemed afterwards. The M-coupon is a cryptographically secured electronic message with some value stored on user’...

Introduction The widespread introduction of online courses for degree-credit in colleges and universities around the globe has sparked contentious discussion among administrators, faculty, and faculty unions (AAUP 1999, Ehrmann, 1999; Noble 1998; Roschelle & Pea, 1999; Tsichritzis, 1999). Two debates have emerged. The first centers around the workload for faculty conducting online courses. One ...

In this paper we propose a new high capacity, low energy requirement, and robust spread spectrum watermark approach for still images. This approach uses an orthogonalisation scheme to generate a set of binary spread spectrum carriers that are able to minimize the interference of the original image on the watermark information detection, so that, more than two hundred bit capacity in a one squar...

The use of active narrow-band interference (NBI) suppression in direct-sequence spread-spectrum (DS-SS) communications has been extensively studied. In this paper, we address the problem of optimum coding-spreading tradeoff for NBI suppression. With maximum likelihood decoding, we first derive upper bounds on the error probability of coded systems in the presence of a special class of NBI, name...

Formal methods have been used mostly in safety-critical projects although some have industrial-strength implementations that can be used eeectively in commercial settings. This paper describes a case study conducted in collaboration with Nortel to demonstrate the feasibility of applying formal methods to telecommunications systems. A lightweight formal method, SDL, was chosen by our qualitative...