Browsing by Author "Tupac, Isaac"

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    Digital receiver modernization using FPGA and JESD204B interface for SDR applications
    (IEEE, Institute of Electrical and Electronics Engineers, 2023) Verástegui, Joaquín; Rojas, John; Tupac, Isaac; Gonzales, Luis
    The latest data acquisition system running at the Jicamarca Radio Observatory (JRO) for the main radar has been used for more than seven years now. Although there are no major inconveniences on the performance, there have been some problems with internal interference which are related to the PCB design that uses old discrete components. A new design is proposed for the digital receivers, giving it more lifetime and flexibility for future modifications. The JESD204B protocol is ideal for radar applications, a JESD204B ADC together with an FPGA was proposed for the new design, making it capable of a wider bandwidth which could adapt the system to an SDR device in the future with the proper software. This paper will present the new PCB design, the IP cores implemented for the FPGA and some preliminary tests with development boards.
    Palabras clave:ProtocolsObservatoriesData acquisition
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    Implementation of an Ionospheric Echoes Receiver using an SDR with GNU Radio to obtain vertical and oblique ionograms
    (2023 CEDAR Workshop, 2023-06) Tupac, Isaac; Milla, M.; Valladares, C.E.; Espinoza, J.C.; De la Jara, César; Arboleda, E.; Belleza, A.; Vila, N.; Scipión, Danny
    The Jicamarca Radio Observatory (JRO) operates a vertical incidence pulsed ionospheric radar (VIPIR) dedicated to probing the equatorial ionosphere. This high-resolution system runs 24/7 and complements the suite of observations performed at JRO. As the VIPIR ionosonde operates with a wide beam antenna and reflected signals are dispersed at distances far as 1500 km, we have designed, built, and installed four new VIPIR receivers dedicated to oblique sounding. These receivers increase and expand the system's field of view and enable unique measurements, yielding new scientific results. This poster describes the Ionospheric Echoes Receiver (IER) by listing its components and detailing the different parts of the hardware and software elements. The receivers use a USRP N200 by Ettus and an acquisition flowgraph implemented in GNU Radio Companion. In addition, we present the OOT (Out Of Tree block), which generates the demodulation signal and changes its frequency value each Inter Pulsed Period. We also show preliminary displays of the vertical and oblique ionograms acquired using the Jicamarca VIPIR and the new receivers.
    Palabras clave:SDR ReceiverOblique ionogramsGNU Radio
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    Initial design of a GNU radio interface for the new version of the Jicamarca Acquisition Radar System (JARS 2.0)
    (Instituto Geofísico del Perú, 2020-06) Tupac, Isaac; Rojas, John; Verástegui, Joaquín; Espinoza, Juan Carlos; Milla, Marco
    In this poster the initial design of a new software interface to control the novel ethernet based radar acquisition system JARS 2.0 of the Jicamarca Radio Observatory is presented. This interface will be implemented using the open-source software development toolkit GNU Radio; which besides controlling the JARS 2.0, it will obtain the acquired data for its further processing. The aim of the project, although in its development stage, will be to use the benefits of the GNU Radio to process, plot and even save the data in an standard way.
    Palabras clave:Ionospheric radarJicamarca radarJARS