2026-04-17T19:07:44Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3590932026-01-21T06:38:07Zcom_2072_1033col_2072_452950

SDR implementation of a testbed for synchronization of coherent distributed remote sensing systems Merlano-Duncan, Juan Carlos Querol Borràs, Jorge Martínez Marrero, Liz Krivochiza, Jevgenij Camps Carmona, Adriano José Chatzinotas, Simeon Ottersten, Bjorn Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció Remote sensing Signal processing Synchronization Multi-static remote sensing systems Distributed beamforming SDR implementation Teledetecció Tractament del senyal Remote Sensing from distributed platforms has become attractive for the community in the last years. Phase, frequency, and time synchronization are a crucial requirement for many such applications as multi-static remote sensing and also for distributed beamforming for communications. The literature on the field is extensive, and in some cases, the requirements an complexity of the proposed synchronization solution may surpass the ones set by the application itself. Moreover, the synchronization solution becomes even more challenging when the nodes are flying or hovering on aerial or space platforms. In this work, we discuss the synchronization considerations for the implementation of distributed remote sensing applications. The general framework considered is based on a distributed collection of autonomous nodes that synchronize their clocks with a common reference using inter-satellite links. For this purpose, we implement a synchronization link between two nodes operating in a full-duplex fashion. The experimental testbed uses commercially available SDR platforms to emulate two satellites, two targets, and the communication channel. The proposal is evaluated considering phase and frequency errors for different system parameters. This work was supported by the Fond National de la Recherche Luxembourg, under the CORE project COHESAT: Cognitive Cohesive Networks of Distributed Units for Active and Passive Space Applications. Peer Reviewed Postprint (author's final draft) 2020 Conference report Merlano-Duncan, J.C. [et al.]. SDR implementation of a testbed for synchronization of coherent distributed remote sensing systems. A: IEEE International Geoscience and Remote Sensing Symposium. "IGARSS 2020: 2020 IEEE International Geoscience and Remote Sensing Symposium Proceedings: September 26 - October 2, 2020: virtual symposium". Institute of Electrical and Electronics Engineers (IEEE), 2020, p. 6588-6591. ISBN 978-1-7281-6374-1. DOI 10.1109/IGARSS39084.2020.9324220. 978-1-7281-6374-1 https://hdl.handle.net/2117/359093 10.1109/IGARSS39084.2020.9324220 eng https://ieeexplore.ieee.org/document/9324220 Open Access 4 p. application/pdf Institute of Electrical and Electronics Engineers (IEEE)