Digital communication system

A digital communication system is reported for parallel operation of 16 or more transceiver units with the use of only four interconnecting wires. A remote synchronization circuit produces unit address control words sequentially in data frames of 16 words. Means are provided in each transceiver unit to decode calling signals and to transmit calling and data signals. The transceivers communicate with each other over one data line. The synchronization unit communicates the address control information to the transceiver units over an address line and further provides the timing information over a clock line. A reference voltage level or ground line completes the interconnecting four wire hookup

Global Digital Communication: Texting, Social Networking Popular Worldwide

Presents survey findings about trends in the use of cell phone technologies and social networking sites in twenty-one countries by age, gender, and education and in relation to GDP per capita

Comparison analysis of stream cipher algorithms for digital communication

The broadcast nature of radio communication such as in the HF (High Frequency) spectrum exposes the transmitted information to unauthorized third parties. Confidentiality is ensured by employing cipher system. For bulk transmission of data, stream ciphers are ideal choices over block ciphers due to faster implementation speed and not introducing error propagation. The stream cipher algorithms evaluated are based on the linear feedback shift register (LFSR) with nonlinear combining function. By using a common key length and worst case conditions, the strength of several stream cipher algorithms are evaluated using statistical tests, correlation attack, linear complexity profile and nonstandard test. The best algorithm is the one that exceeds all of the tests

Digital Communication Systems Subject to Frequency Selective Fading

Frequency selective fading effects on binary digital communication system

El arte y los nuevos medios en Italia Title: Art and New Media in Italy

Maria Grazia Mattei (1950-), Italian expert in new communications technology, founder of MGM Digital Communication, with remarks by artist Fabrizio Plessi.Abstract: Maria Grazia Mattei (1950 -), experta italiana en la nueva tecnología de las comunicaciones, fundadora de MGM Digital Communication, con notas del artista Fabrizio Plessi.Culture & Arts, Cultural Center Encuentros Nro. 45 Maria Grazia Mattei Art and New Media in Italy

Digital communications techniques Interim report, 15 Sep. 1969 - 15 Feb. 1970

Convolutional codes and recursive signal processing for digital communication

Statistical mechanical analysis of the linear vector channel in digital communication

A statistical mechanical framework to analyze linear vector channel models in digital wireless communication is proposed for a large system. The framework is a generalization of that proposed for code-division multiple-access systems in Europhys. Lett. 76 (2006) 1193 and enables the analysis of the system in which the elements of the channel transfer matrix are statistically correlated with each other. The significance of the proposed scheme is demonstrated by assessing the performance of an existing model of multi-input multi-output communication systems.Comment: 15 pages, 2 figure

Performance of self bit synchronizers for the detection of anticorrelated binary signals

Self bit synchronizers for detection of anticorrelated binary systems of digital communication system