Integrating Software Defined Radio with USRP

2017 ◽  
Vol 9 (3) ◽  
pp. 1-9 ◽  
Author(s):  
Ehsan Sheybani ◽  
Giti Javidi
Keyword(s):  
Software Defined Radio ◽  
Tracking System ◽  
Software Radio ◽  
Block Code ◽  
Radio Stations ◽  
Entry Level ◽  
Hands On ◽  
Phase Q ◽  
To Receive ◽  
Development Capability

The USRP1 is the original Universal Software Radio Peripheral hardware (USRP) that provides entry-level RF processing capability. Its primary purpose is to provide flexible software defined radio development capability at a low price. You can control the frequency you receive and transmit by installing different daughter-boards. The authors' USRP model had been configured to receive a signal from local radio stations in the DC, Maryland metropolitan area with the BasicRX model daughterboard. The programmable USRP was running python block code implemented in the GNU Radio Companion (GRC) on Ubuntu OS. With proper parameters and sinks the authors were able to tune into the radio signal, record the signal and extract the in-phase (I) and quadrature phase (Q) data and plot the phase and magnitude of the signal. Using the terminal along with proper MATLAB and Octave code, they were able to read the I/Q data and look at the Fast Fourier Transform (FFT) plot along with the I/Q data. With the proper equations, you could determine not only the direction of arrival, but one would also be able to calculate the distance from the receiver to the exact location where the signal is being transmitted. The purpose of doing this experiment was to gain experience in signal processing and receive hands on experience with the USRP and potentially add a tracking system to the authors' model for further experiments.

Universal Software Radio Peripheral/GNU Radio-Based Implementation of a Software-Defined Radio Communication System

2019 ◽  
pp. 227-240
Author(s):  
Ehsan Sheybani
Keyword(s):  
Communication System ◽  
Software Defined Radio ◽  
Software Radio ◽  
Block Code ◽  
Radio Station ◽  
Frequency Change ◽  
Gnu Radio ◽  
Radio Communication ◽  
Space Communications ◽  
Radio Communication System

Challenges involved in space communications across wireless channels call for new approaches to radio systems. Due to the growing need for frequency change in modern wireless systems, an adaptive radio system has the highest demand. Software-defined radios (SDR) offer this type of adaptivity as well as compatibility with other standard platforms such as USRP/GNU radio. Despite limitations of this approach due to hardware components, viable modeling and simulation as well as deployable systems are possible using this platform. This chapter presents a detailed implementation procedure for a USRP/GNU radio-based SDR communication system that can be used for practical experiments as well as an academic lab in this field. In this experiment the USRP has been configured to receive signal from a local radio station using the BasicRX model daughterboard. The programmable USRP executes Python block code implemented in the GNU Radio Companion (GRC) on Ubuntu OS.

scholarly journals Implementation of Transceiver module for SDR system using ADALM PLUTO platform

2018 ◽  
Vol 7 (4.6) ◽  
pp. 279
Author(s):  
Sowjanya. P. ◽  
Satyanarayana P.
Keyword(s):  
Software Defined Radio ◽  
Large Scale ◽  
Technology Development ◽  
New Technology ◽  
Software Radio ◽  
Radio Station ◽  
Radio Communication ◽  
Radio Stations ◽  
Open Standard ◽  
Software Modules

Software Defined Radio (SDR) provides a comprehensive radio communication platform, based on which new technology can be used through software update. This leads to a large-scale reduction in expansion costs and enables the product to maintain technology development. The SDR platform can be set up with an open, standard, and programmable hardware platform, based on which the functions of the radio can be perceived by adding appropriate software modules. In this platform, the transformation and expansion of the radio functions are done in a software version without the need for a modification of the equipment. Such software radio station can easily communicate with the current or upcoming radio stations. In this article, we analyze SDR evolution and various platforms and implement various modulation techniques with the aim of successfully transferring a message wirelessly over-the-air using ADALM-PLUTO SDR platform by Analog Devices. 

Coding Is Lit: Integrating Coding and Literacy in Early Childhood Inclusive Settings

2021 ◽  
pp. 004005992110101
Author(s):  
Nicole S. Fenty ◽  
Abby Pierce ◽  
Julia Schildwachter
Keyword(s):  
Early Childhood ◽  
Critical Thinking ◽  
Young Children ◽  
21St Century ◽  
Grade Level ◽  
Literacy Skills ◽  
Inclusive Settings ◽  
Hands On ◽  
Common Grade ◽  
To Receive

There has been an increased emphasis in recent years on supporting young children with building 21st century literacy skills such as critical thinking and collaboration. Unfortunately, young children with or at risk for disabilities are unlikely to receive access to experiences that build 21st century literacies. Pre-coding activities, which include hands-on coding games and stories appropriate for young children, are one way to provide access to this population of students. The purpose of this article is to provide details about how educators in early childhood inclusive settings may integrate pre-coding activities with everyday routines and procedures as well as with common grade level appropriate read alouds. Fundamentals of pre-coding are provided along with guidelines for planning and instruction.

Special Speciation

2015 ◽  
Vol 77 (2) ◽  
pp. 145-147
Author(s):  
Lyn L. Countryman ◽  
Jill D. Maroo
Keyword(s):  
High School ◽  
Elementary Education ◽  
Anecdotal Evidence ◽  
Education Students ◽  
Biology Students ◽  
Entry Level ◽  
Speciation Model ◽  
Hands On ◽  
Elementary Education Students

Considerable anecdotal evidence indicates that some of the most difficult concepts that both high school and undergraduate elementary-education students struggle with are those surrounding evolutionary principles, especially speciation. It’s no wonder that entry-level biology students are confused, when biologists have multiple definitions of “species.” We developed this speciation activity to provide clarity and allow students a hands-on experience with a speciation model.

BOC signals processing by two traditional correlator channels

2021 ◽  
pp. 5-17
Author(s):  
O.K. Mikhaylova ◽  
I.V. Korogodin
Keyword(s):  
Direct Method ◽  
Tracking System ◽  
Practical Importance ◽  
Reference Signal ◽  
Processing Algorithm ◽  
Statistical Characteristics ◽  
Navigation Systems ◽  
Signal Delay ◽  
Signal Processing Algorithm ◽  
To Receive

Problem statement. With the development of satellite navigation systems, new navigation BOC signals are being introduced. Since the structure of BOC signals differs from traditional BPSK signals, this complicates their processing, which may require hardware changes and often leads to the need to develop new ones. Objective. Synthesis and analysis of the BOC signal processing algorithm using two BPSK correlators, comparable in accuracy to the direct method. Results. The synthesis and analysis of the BOC signal delay tracking system using two correlators, originally designed to receive only BPSK-conducting signals, are carried out. The statistical characteristics of the delay discriminator are obtained. It is shown how the accuracy and sensitivity of the obtained delay tracking algorithm are correlated with respect to the reference algorithm, which assumes the use of a signal with a digital subcarrier in the reference signal of the correlator. The pull-in characteristic are obtained. Practical relevance. The processing algorithm BOC signals that doesn't require modification of the traditional correlators of the navigation receiver is presented. This algorithm is of great practical importance, since it allows for high-precision reception of modern BOC and AltBOC signals, despite the limitations characteristic of modern navigation equipment. For example, this algorithm allows to receive Galileo E5 signals using the popular NTLab NT1065 chip. A new signal pull-in algorithm is proposed. This algorithm allows to avoid abnormal tracking errors caused by the operation of the tracking system in the side zones of the s-curve. The pull-in characteristics for various receive conditions are given.

scholarly journals Securing the wireless emergency alerts system

2021 ◽  
Vol 64 (10) ◽  
pp. 85-93
Author(s):  
Jihoon Lee ◽  
Gyuhong Lee ◽  
Jinsung Lee ◽  
Youngbin Im ◽  
Max Hollingsworth ◽  
...  
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Software Defined Radio ◽  
Severe Weather ◽  
Base Stations ◽  
The Public ◽  
Software Libraries ◽  
Amber Alerts ◽  
Almost All ◽  
To Receive

Modern cell phones are required to receive and display alerts via the Wireless Emergency Alert (WEA) program, under the mandate of the Warning, Alert, and Response Act of 2006. These alerts include AMBER alerts, severe weather alerts, and (unblockable) Presidential Alerts, intended to inform the public of imminent threats. Recently, a test Presidential Alert was sent to all capable phones in the U.S., prompting concerns about how the underlying WEA protocol could be misused or attacked. In this paper, we investigate the details of this system and develop and demonstrate the first practical spoofing attack on Presidential Alerts, using commercially available hardware and modified open source software. Our attack can be performed using a commercially available software-defined radio, and our modifications to the open source software libraries. We find that with only four malicious portable base stations of a single Watt of transmit power each, almost all of a 50,000-seat stadium can be attacked with a 90% success rate. The real impact of such an attack would, of course, depend on the density of cellphones in range; fake alerts in crowded cities or stadiums could potentially result in cascades of panic. Fixing this problem will require a large collaborative effort between carriers, government stakeholders, and cellphone manufacturers. To seed this effort, we also propose three mitigation solutions to address this threat.

Enhancement of efficacy of tuberculosis drugs with Immunoxel (Dzherelo™) in HIV-infected patients with active pulmonary tuberculosis

Immunotherapy ◽  
2009 ◽  
Vol 1 (4) ◽  
pp. 549-556 ◽  
Author(s):  
Olga V Arjanova ◽  
Natalia D Prihoda ◽  
Larisa V Yurchenko ◽  
Nina I Sokolenko ◽  
Lyudmila A Vihrova ◽  
...  
Keyword(s):  
Opportunistic Infections ◽  
Average Weight ◽  
Active Pulmonary Tuberculosis ◽  
Entry Level ◽  
Antiretroviral Drug ◽  
Chest X Ray ◽  
Drug Naïve ◽  
To Receive ◽  
Culture Conversion

Immunoxel (Dzherelo™) is an oral, herbal immunomodulator used in Ukraine for adjunct therapy of infectious and autoimmune diseases. Antiretroviral drug-naive, tuberculosis (TB)/HIV coinfected patients with active pulmonary TB were divided into two arms, A (n = 20) and B (n = 20), to receive first-line anti-TB therapy (ATT) or ATT + Dzherelo, respectively. As a result, three (16%) versus 12 (67%; p = 0.003) patients had Mycobacterium tuberculosis culture conversion, with time to negative culture of 6 and 4 months in arms A and B, respectively. In the ATT-alone arm, the healing of pulmonary cavitations was observed in 25% of patients at weeks 24–28, while 60% of individuals in arm B healed at 16–18 weeks (p = 0.025). The TB lesions, on chest x-ray, had cleared in 46 and 84%, with time-to-clearance of 24–28 and 16–18 weeks in arms A and B, respectively. In the ATT-alone arm, the bodyweight at baseline was 64 ± 6.3 kg, with 13 cachexic patients who had an average weight deficit of -5.2 ± 1.7 kg. At the end of 6 months of follow-up, they have lost an additional 0.6 kg (-5.8 ± 2.4). The study entry-level weight in arm B was 52 ± 5.7 kg, with 12 individuals who had a body mass deficit of -8.5 ± 2.7 kg. The immunotherapeutic intervention increased bodyweight by an average of 5.8 ± 2.6 kg above baseline (p < 0.0001). The inclusion of Dzherelo into the ATT regimen decreased the incidence of new opportunistic infections (OI) with three episodes of OI versus 12 in arm A (p = 0.003). These findings indicate that Dzherelo contributes positively to the clinical efficacy of TB drugs.

Secure Baseband Techniques for Generic Transceiver Architecture for Software-Defined Radio

2021 ◽  
pp. 1961-1983
Author(s):  
Nikhil Kumar Marriwala ◽  
Om Prakash Sahu ◽  
Anil Vohra
Keyword(s):  
Communication System ◽  
Software Defined Radio ◽  
Main Part ◽  
Software Radio ◽  
Reliable Communication ◽  
Main Interest ◽  
The Future ◽  
Forward Error ◽  
Programmable Hardware

Software Defined Radio (SDR) systems are the ones which can adapt to the future-proof solution and it covers both existing and emerging standards. An SDR has to possess elements of reconfigurability, intelligence and software programmable hardware. The main interest in any communication group is the sure sending of signals of info from a transmitter to a receiver. The signals are transmitted via a guide who corrupts the signal. To ensure reliable communication forward error-correcting (FEC) codes are the main part of a communication system. This chapter will discuss an SDR system built using LabVIEW for a Generic Transceiver. This chapter has covered emerging software radio standards and the technologies being used to specify and support them.

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