DEKOMPOSISI TUGAS-TUGAS SOFTWARE-DEFINED RADIO (SDR)

ABTRACT This paper addresses decomposition of the tasks of Software-Defined Radio (SDR) computation by taking Gaussian Minimum Shift Keying (GMSK) as a case study. The aim of this research was to produce a task graph of the SDR that was needed in scheduling of distributed computing with task parallelism using genetics algorithm. Based on the tasks decomposition and the evaluation of execution time of each task, we obtained a task graph of SDR computation. We conclude that there are 11 (eleven) tasks for the modulator dan 15 (fifteen) for the demodulator. Keywords: executiion time, gaussian minimum shift keying, height function, modulation, task graph, task-parallelism, software-defined radio. INTISARI Makalah ini membahas dekomposisi tugas-tugas komputasi Software-Defined Radio (SDR) dengan mengambil studi kasus skema modulasi Gaussian Minimum Shift Keying (GMSK). Tujuan penelitian ini adalah menghasilkan sebuah grafik tugas (task graph) komputasi SDR yang diperlukan untuk proses penjadwalan komputasi terdistribusi dengan metoda paralelisme tugas (task-parallelism) menggunakan algoritma genetika. Berdasarkan hasil dekomposisi tugas dan pengujian waktu eksekusi masing-masing tu-gas, maka diperoleh sebuah grafik tugas komputasi SDR menggunakan skema modulasi GMSK yaitu 11 (sebelas) tugas untuk modulator dan 15 (lima belas) tugas untuk de-modulator. Kata Kunci: fungsi ketinggian, gaussian minimum shift keying, grafik tugas, modulasi, paralelisme tugas, software-defined radio, waktu eksekusi

Software defined radio (SDR) on radiocommunications teaching

The recent outbreak of Software Defined Radios (SDR), where traditionally hardware components are substituted by software, have revolutionized the way we understand and manage radiocommunications. The current state of technology allows low cost SDR receivers to tune emissions in a simple way with almost no experience and little effort. The great flexibility of this equipment allows a perfect adaptation of the practice part of the subject to the theory objectives and makes possible to learn outside the classroom, something unthinkable until now. To achieve this, the student only needs a low-cost SDR receiver, a computer and some free software. This paper presents a new teaching methodology for practicing radiocommunications subject using a workstation based on a SDR device that can receive, display and analyze radio transmissions. Subject learning outcomes and skills are acquired and strengthened through experimentation with this new kind of devices. This platform also represents a significant saving because avoids our university to buy expensive and closed "training kits".CUD Universidad de Vigo Grupo de Investigación Señales, Sistemas y Comunicaciones Navales. Universidad de Cádi

Why Software-Defined Radio (SDR) Matters in Healthcare?

Background: Wireless Body Area Networks (WBANs) have been drawing noteworthy academic and industrial attention. A WBAN states a network dedicated to acquire personal biomedical data via cutting-edge sensors and to transmit healthcare-related commands to particular types of actuators intended for health purposes. Still, different proprietary designs exist, which may lead to biased assessments. This paper studies the role of Software-Defined Radio (SDR) in a WBAN system for inpatient and outpatient monitoring and explains to health professionals the importance of the SDR within WBANs. Methods: A concern related to all wireless networks is their dependence on hardware, which limits reprogramming or reconfiguration alternatives. If an error happens in the equipment, firmware, or software, then, typically, there will be no way to fix system vulnerabilities. SDR solves many fixed-hardware problems with other benefits. Results: SDR entails more healthcare domain dynamics with more network convergence in agreement with the stakeholders involved. Then the SDR perspective can bring in innovation to the healthcare subsystems’ interoperability with recombination/reprogramming of their parts, updating, and malleability. Conclusion: SDR technology has many utilizations in radio environments and is becoming progressively more widespread among all kinds of users. Nowadays, there are many frameworks to manipulate radio signals only with a computer and an inexpensive SDR arrangement. Moreover, providing a very cheap radio receiver/transmitter equipment, SDR devices can be merged with free software to simplify the spectrum analyses, provide interferences detection, deliver efficient frequency distribution assignments, test repeaters' operation while measuring their parameters, identify spectrum intruders and characterize noise according to frequency bands

Open Source Antenna Pattern Measurement System

WSU Applied Engineering Project to increase Radio Frequency (RF) measurement capability for student laboratories and senior projects. Integrate a software-defined-radio (SDR) to a portable, motor-controlled antenna positioning system

Radioespectrómetro solar basado en Software Defined Radio (SDR)

El trabajo trata sobre realizar un lector de espectro solar utilizando un dispositivo de bajo coste basado en los dispositivos SDR (Software Defined Radio). Estos dispositivos procesan digitalmente la señal que leen a través del puerto de conexión de la antena. La idea final es sustituir un dispositivo que hay actualmente en la universidad de Alcalá por otro basado en esta tecnología. Por ello se realiza un estudio de los dispositivos SDR que hay en el mercado y se termina eligiendo el basado en RTL-SDR. Se trata del dispositivo más barato y eficiente del mercado con estas características. Una de las premisas de este trabajo es que tiene que ser de bajo coste, por ello se elige también este dispositivo de precio reducido. Este SDR junto con una Raspberry Pi serán los encargados de leer el espectro electromagnético. Aparte de estos dos dispositivos, también será necesario tener un ordenador con sistema operativo Windows para poder ejecutar ahí el programa e-callisto y procesar todo lo leído con el SDR y la Raspberry. El objetivo del trabajo es desarrollar un código que realice las medidas utilizando el SDR. Hay varias versiones del trabajo que se irán estudiando más en detalle.The project deals with the realization of a solar spectrum reader using a low-cost device based on SDR (Software Defined Radio) devices. These devices digitally process the signal they read through the antenna connection port. The final idea is to replace a device currently available at the University of Alcalá with another one based on this technology. Therefore, a study of the SDR devices on the market was carried out and the RTL-SDR based device was chosen. This is the cheapest and most efficient device on the market with these characteristics. One of the premises of this project is that it has to be low cost. This SDR together with a Raspberry Pi will be in charge of reading the electromagnetic spectrum. Apart from these two devices, it will also be necessary to have a computer with Windows operating system to run the e-callisto program there and process everything read with the SDR and the Raspberry. The objective of the project is to develop a code that performs the measurements using the SDR. There are several versions of the project that will be studied in more detail.Grado en Ingeniería en Tecnologías de Telecomunicació

A Software-Defined Radio Receiver in 65nm CMOS Robust to Out-of-Band Interference

Two techniques are presented in this paper for a software-defined radio (SDR) receiver robust to out-of-band interference. Voltage gain is realized at IF simultaneously with low-pass filtering to mitigate blockers and out-of-band intermodulation distortion. A 2-stage polyphase harmonic rejection (HR) mixer concept robust to gain error achieves 2nd-6th HR of more than 60dB for 40 samples without trimming or calibration. A prototype 0.4-0.9G zero-IF receiver in 65nm CMOS has 34dB gain, 4dB NF, +3.5dBm IIP3 and +47dBm IIP2 while drawing 50mA from 1.2V

STUDI EKSPERIMEN UNJUK-KERJA MODULASI DBPSK PADA PLATFORM SOFTWARE-DEFINED RADIO (SDR)

ABTRACT This paper addresses Differential Binary Phase Shift Keying (DBPSK) modulation implemented on SDR platform for the development of digital data communications based on SDR. DBPSK modulation performance perceived at Packet Error Rate (PER) is evaluated in terms of Eb/No or S/N ratio, carrier frequency, bit rate, gain, roll-off factor of root Nyquist filter or root raised cosine filter, and of size of payload from delivered data. Based on this results, the smallest PER could be obtained by setting Eb/No value which is greater than 13 dB, carrier frequency of at least 0,3 MHz, optimum bit rate of 256 kbps, optimum range payload size of 2000 up to 4000 bytes, and roll-off factor of Nyquist or root-raised cosine filter of 0.1 < alfa < 0.9. INTISARI Makalah ini membahas pengujian unjuk-kerja modulasi Differential Binary Phase Shift Keying (DBPSK) yang diimplementasikan pada platform Software-Defined Radio (SDR) dalam rangka pengembangan sistem komunikasi digital berbasis SDR. Unjuk-kerja modulasi DBPSK diamati dalam bentuk Packet Error Rate (PER) dengan berbagai variasi nilai perbandingan Eb/No atau S/N, frekuensi pembawa, bit rate, gain, roll-off factor pada filter root Nyquist atau filter root raised cosine, dan ukuran payload data yang dikirimkan. Berdasarkan hasil penelitian ini, nilai PER terendah dapat diperoleh dengan mengatur nilai Eb/No lebih besar dari 13 dB, frekuensi pembawa minimal 0,3 MHz, bit rate optimum 256 kbps, ukuran payload optimum berkisar 2000 sampai dengan 4000 bytes, dan nilai roll-off factor pada filter Nyquist atau filter root-raised cosine adalah 0.1 < alfa < 0.9

A Software-Defined-Radio Platform for Multiple-Input-Multiple-Output Over-The-Air Measurement

This paper presents a 2 × 2 multiple-inputmultiple-output over-the-air (MIMO OTA) measurement system with user-programmable, reconfigurable and real-time signal processing field-programmable gate arrays (FPGAs)-based software-defined radio (SDR) capability. Signal generation and analysis as well as channel emulation are all implemented using vector signal transceivers (VSTs). As a demonstration, we performed the Third Generation Partnership Project (3GPP) two-stage MIMO OTA conducted test using a downlink time division long-term evolution (TD-LTE) duplex scheme. The channel emulation was operated in a stochastic mode. Some preliminary results of the system verification are shown