Print Email Facebook Twitter Experimental study on multi-channel waveform agile beamforming and testbed calibration Title Experimental study on multi-channel waveform agile beamforming and testbed calibration Author Ahmed, Sheeraz (Student TU Delft) Aubry, P.J. (TU Delft Microwave Sensing, Signals & Systems) Yarovoy, Alexander (TU Delft Microwave Sensing, Signals & Systems) Date 2021 Abstract In this paper, a novel multi-channel waveform agile radar testbed - ASTAP (Advanced Space-Time Adaptive Processing) with eight transmit channels and a single receive channel to form a co-located Multiple-Input Single-Output (MISO) radar is presented. Based on current configuration, the ASTAP radar system possesses agility for synthesizing and transmitting independent waveforms via each transmit channel simultaneously via multi-channel Arbitrary Waveform Generator (AWG). Hardware imperfections influence on digitally created waveforms including limited-bits DAC (Digital-to-Analog Converter) quantization, inter-channel time- and phase-skew (and/or jitter), non-linearities introduced by high-frequency devices (RF amplifiers and mixers etc) and antenna dispersion effects has been studied experimentally.An end-to-end system-level digital calibration using Over-the-Air (OTA) channel measurements to minimize system hardware imperfections prior to transmission is proposed. Calibration accuracy for waveform transmit ambiguity functions, orthogonality in MISO transmissions, received signals separation and beamforming process for the synthesis of target azimuth distributions is examined and quantified. Front-end performance with different waveforms types for colored transmission and simultaneous MIMO is demonstrated and analysed. Extraction of the signals corresponding to each transmit channel from the composite received signal in a single receive channel exploiting waveforms orthogonality is studied experimentally. Subject Coded waveformsfront-end calibrationmulti-channel radar demonstratorMISO transmissionsmultibeam processingmulti-channel front-endOTA measurement calibrationwaveform agility To reference this document use: http://resolver.tudelft.nl/uuid:e420f7a6-4ff2-4e74-9671-dccb565b6cff DOI https://doi.org/10.1109/CAMA49227.2021.9703587 Publisher IEEE Embargo date 2022-08-11 ISBN 978-1-7281-9698-5 Source 2021 IEEE Conference on Antenna Measurements & Applications (CAMA): Proceedings Event 2021 IEEE Conference on Antenna Measurements & Applications (CAMA), 2021-11-15 → 2021-11-17, Antibes Juan-les-Pins,, France Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type conference paper Rights © 2021 Sheeraz Ahmed, P.J. Aubry, Alexander Yarovoy Files PDF Experimental_study_on_mul ... ration.pdf 2.16 MB Close viewer /islandora/object/uuid:e420f7a6-4ff2-4e74-9671-dccb565b6cff/datastream/OBJ/view