WIRELESS TELEGRAPHY

The use of diversity for voice-frequency telegraphy on HF radio circuits

Use of the Telegraphy Equation to Improve Absorbing Boundary Efficiency for Fourth-order Acoustic Wave Finite Difference Schemes

Finite difference methods are becoming increasingly popular for calculating synthetic seismograms because of the ease with which they can be applied to model the low-frequency response of complex geometries for which no analytical solutions can be derived. In addition to the obvious advances in computing speed and storage capabilities which have made numerical solution of large, realistic geome...

Wireless sensor network design through genetic algorithm

In this paper, we study WSN design, as a multi-objective optimization problem using GA technique. We study the effects of GA parameters including population size, selection and crossover method and mutation probability on the design. Choosing suitable parameters is a trade-off between different network criteria and characteristics. Type of deployment, effect of network size, radio communication...

The Beginnings of Radio Communication in Germany, 1897-1918

This article surveys the prehistory of broadcasting in the German Reich. It focuses on wireless telegraphy, where the Telefunken Company succeeded internationally with its quenched spark system on the eve of the war. Telefunken's system was developed as an efficient military technology between 1905 and 1908, and it soon became the core of Telefunken's successful attempt to break Marconi's monop...

bandwidth estimation in wireless networks (tcp-bwiw): to improve tcp performance in wireless communication networks

as wireless networks with high data rate get widely deployed, improving the performance of tcp over these networks plays vital role. wireless link losses have dramatic adverse impact on tcp performance due to the difficulty in distinguishing the congestion losses from wireless link losses. we first, studied the various existing bandwidth estimation algorithms over the wireless networks. in this...