LOW-Cost Prototype Equipment For VLF Radio Wave Monitoring
Journal Title: Acta Technica Napocensis- Electronica-Telecomunicatii (Electronics and Telecommunications) - Year 2012, Vol 53, Issue 1
Abstract
The paper presents a short overview of the natural phenomena that generates VLF, ELF and SLF electromagnetic waves. In order to emphasize the importance of studying these waves, the paper presents a prototype equipment used for receiving and monitoring very low frequency electromagnetic waves generated by natural and artificial sources. The functionality of the equipment is proved by monitoring, during several days, different VLF radio transmitters located at distances over 1000 km from the reception point. The data collected revealed the diurnal variations of the VLF radio wave propagation and the induced disturbances in propagation conditions during January 4th 2011 partial solar eclipse.
Authors and Affiliations
Paul DOLEA, Vlad DASCAL, Tudor PALADE, Octavian CRISTEA
TLS Protocol: Secure Protocol With Client Puzzles
Client puzzles are commonly proposed as a solution to denial-of-service attacks. We analyzed the TLS protocol and implement Client Puzzles algorithm. We pursued the following objectives: analyze TLS handshake protocol...
Digital Implementation of The Sigmoid Function for FPGA Circuits
In this paper, is proposed a method to implement in FPGA (Field Programmable Gate Array) circuits different approximation of the sigmoid function. Three previously published piecewise linear and one piecewise second-orde...
Simplification Of A Link Performance Prediction Method Based On Mutual Information
In this paper, we propose a method to predict the block error rate performance of the wireless links in OFDM communication systems. Our approach relies on a performance prediction methodology that uses the mean mutual in...
Using Dynamic Time Warping Algorithm Optimization For Fast Human Action Recognition
In this paper, we present an approach based on dynamic programming and neural network for recognition and matching human action. Each human action is represented by the angular motion of the body parts. Each body part an...
A Derived Robust Statistics Approach For Adaptive Volterra Filters Applied In Nonlinear Acoustic Echo Cancellation Scenarios
The paper proposes a novel updating concept for adaptive Volterra kernels that relies on a robust statistics approach. The optimization of a certain cost function leads to the update equations for the linear and quadrati...