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In this paper we present a proof-of-concept for an hydro acoustic fish-tag position estimation and tracking system. In our field-tested concept, a formation of Unmanned Surface Vehicles (USV) creates a mobile array of low-cost hydro acoustic fish-tag receivers. The array of receivers is able to estimate fish-tag locations and follow the fish on open waters, significantly increasing capabilities as...
In the context of an impressive development of software defined networks and of internet technologies, this paper presents the aspects related to the implementation of an online wideband multimode radio receiver. The receiver was developed considering its main application in LEO satellite data reception, for frequencies up to 1.7 GHz. In additional to the hardware implementation description, the paper...
Line impedance stabilization network (LISN) is an important tool to provide noiseless power supply in electromagnetic compatibility (EMC) testing. There are several brands of LISN that are recognized in the market. However, the quality of measurement provided by the LISN is not dependent upon the quality of the product, but also its application scheme. This paper investigates the effect of grounding...
This paper describes and verifies a method of implementing bit error rate (BER) calculation for FPGA-based physical layer security techniques for Software Defined Radio (SDR). Specifically, we describe an independent source signal processing architecture for an efficient calculation of BER for wireless communication modules across the transmitter and receiver nodes. The source components at the transmitter...
Ad-hoc Wi-Fi is well known in disaster communications systems, because of its ability to form infrastructure-free peer-to-peer networks. However, ad-hoc Wi-Fi has a major disadvantage due to the lack of coordinating infrastructure: Its energy consumption is very high, reducing battery life to as little as 1.5 hours. Thus, while it would be highly desirable for mobile phones to use ad-hoc Wi-Fi communications...
With the constant advances in wireless technology, radio spectrum has become a very scarce resource. Cognitive Radio (CR) has emerged as a viable way to deal with our inefficient use of the radio spectrum by utilizing unused spectrum holes or white spaces, as they are referred to. Using Software Defined Radio (SDR) we are able to realize CRs and their unique properties. Most of the research that has...
Modern programmable electronic devices are becoming more and more susceptible to Electromagnetic Interference, meanwhile relying heavily on communication networks. In those networks, Cyclic Redundancy Checks (CRCs) are widely used to validate the correctness of transmitted data. However, this paper shows that, at specific bit and disturbance frequencies, CRC can generate false positives. A formula...
Most underwater deployments rely on acoustics for enabling communication. The equipment for underwater communication is usually very expensive. Simulations of underwater systems are insufficient for many researchers. An open source platform built with commercially available hardware at low rates along with customizable software modules may prove to be very useful for researcher. This paper particularly...
This paper describes recent developments at JIVE and the European VLBI Network (EVN), aimed at fostering the seamless interaction of VLBI networks around the globe, and eventually the inclusion of the SKA and its precursors as VLBI elements.
Based on a workshop developed at INICTEL-UNI, this paper presents the methodology and considerations taken to improve the experiences in communication laboratory sessions in Peruvian universities with Software Defined Radio platforms, using a HackRF-One for transmission and a RTL-SDR for reception together with GNUradio Companion, an open source software. The use of these tools allows real communications...
The development of telecommunications system in modern technology is increasing widely so that the process can take place more quickly and efficiently, one of which was the use of Software Defined Radio (SDR). SDR is a radio communication system where the components that have been typically implemented in hardware (mixers, filters, amplifiers, modulators/demodulators, detectors, etc.) are instead...
This paper presents ionospheric scintillation data recorded at SANAE in Antarctica during a moderate geomagnetic storm on 20–21 January 2016 which gives evidence of the advantages of the new generation of instrumentation for monitoring ionospheric scintillation. The data was collected as part of the DemoGRAPE project aimed at the demonstration of cutting edge technology for the empirical assessment...
A vast amount of natural gas pipelines are installed underwater and they can be punctured because of various reasons such as corrosion and their increasing ages. In this study, nature of acoustic signals which are generated by leak holes on underwater natural gas pipelines is examined and a novel passive acoustic based system is proposed to detect the acoustic signals, to locate leak hole and to determine...
Electronic circuits design is extremely important in information processing or communication systems. Classical design method of electronic circuit is manual programming. The cost of design and test is usually expensive, especially for large scale or complicated circuits. In this paper, hardware circuit is designed by formal method. Behavior of the circuit is described by multiple extended hierarchical...
A novel approach to simulation of communication channel in the presence of intersymbol interference is introduced in the paper. The distinctive feature of the approach is accurate defining of information parameter at the output of communication channel. A new model for additive white Gaussian noise is presented.
Efficient design of wireless networks benefits from the exchange of control messages. However, control messageitself consumes scarce channel resources. In this paper, wepropose CoS (Communication through symbol Silence), a novel communication strategy that conveys control messages for free without consuming extra channel resources. CoS inserts silence symbols in data packets and leverages the intervals...
Commercially available off the shelf Software Defined Radios (SDR) have many of the components required to construct an OFDM or a stepped frequency GPR. Some additional components are required in order to make phase measurements however, as described here. There are also design features of the SDR used here which could make them unsuitable, but which can be mitigated as investigated here.
A brief overview of the acoustic method and the description of the device for inspection the cementation of a well casing based on one-sided excitation and reception of elastic waves at 1–20 kHz from the top of a well is given. A mathematical model of propagation of elastic waves in the system of a well casing and its cement ring containing defective and defect-free areas is considered. The influence...
This paper describes the design and implementation of an End-to-End digital wireless communication system (E2E) system on the Zynq-7000 Field Programmable Gate Array (FPGA) and Evaluation Development (Zed) Board with an Analog Devices AD9364 Wideband Transceiver from a model-based design system. Furthermore, the paper presents the design path to reconfigure the software controlled logic blocks for...
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