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Title: | DDS-Based Signal-Generation Architecture Comparison for an Imaging Radar at 300 GHz | Authors: | Rubio-Cidre, Gorka Badolato, Alejandro Úbeda-Medina, Luis Grajal, Jesús Mencia-Oliva, Beatriz Dorta-Naranjo, Blas Pablo |
UNESCO Clasification: | 3325 Tecnología de las telecomunicaciones | Keywords: | Radar imaging Phase locked loops Chirp Millimeter wave technology Phase noise, et al |
Issue Date: | 2015 | Publisher: | 0018-9456 | Journal: | IEEE Transactions on Instrumentation and Measurement | Abstract: | Submillimeter-wave imaging radars for standoff detection require broadband and fast-switch signal-generation architectures in order to achieve a high-range-resolution and near-video-rate imaging system. The signal generation has a strong influence on the radar image quality, primarily due to the transmitted phase noise. Two direct digital synthesis-based architectures for continuous-wave linear-frequency-modulated signal generation have been fabricated and tested for a high-range-resolution imaging radar at 300 GHz for standoff sensing of person-borne concealed threats. In order to select the signal-generation architecture that ensures the proper operation of the imaging radar with a cost-saving objective, three figures of merit have been used: 1) radar image quality; 2) power consumption; and 3) cost. The impact of the signal-generation architectures on the imaging radar indicates that both architectures present a similar radar performance in terms of radar image quality, although the narrowband direct-digital-synthesis/ phase-locked loop scheme is a cost-effective solution compared with the broadband direct-digital-synthesis scheme in order to develop an affordable and energy-efficient high-performance preindustrial radar prototype. | URI: | http://hdl.handle.net/10553/48349 | ISSN: | 0018-9456 | DOI: | 10.1109/TIM.2015.2440557 | Source: | IEEE Transactions on Instrumentation and Measurement[ISSN 0018-9456],v. 64 (7127004), p. 3085-3098 |
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