{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,7]],"date-time":"2025-11-07T09:43:19Z","timestamp":1762508599702,"version":"build-2065373602"},"reference-count":29,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2021,8,8]],"date-time":"2021-08-08T00:00:00Z","timestamp":1628380800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004837","name":"Ministerio de Ciencia e Innovaci\u00f3n","doi-asserted-by":"publisher","award":["TEC2017-82807-P"],"award-info":[{"award-number":["TEC2017-82807-P"]}],"id":[{"id":"10.13039\/501100004837","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This work presents a strategy to upgrade models for power amplifier (PA) behavioral modeling and digital predistortion (DPD). These incomplete structures are the consequence of nonlinear order and memory depth model truncation with the purpose of reducing the demand of the limited computational resources available in standard processors. On the other hand, the alternative use of model structures pruned a priori does not guarantee that every significant term is included. To improve the limited performance of an incomplete model, a general procedure to augment its structure by incorporating significant terms is demonstrated. The sparse nature of the problem allows a successive search incorporating additional terms with higher nonlinear order and memory depth. This approach is investigated in the modeling and linearization of a commercial class AB PA operating at a compression point of about 6 dB, and a class J PA operating near saturation. Results highlight the capabilities of this upgrading procedure in the improvement of linearization capabilities of DPDs.<\/jats:p>","DOI":"10.3390\/s21165350","type":"journal-article","created":{"date-parts":[[2021,8,8]],"date-time":"2021-08-08T21:35:40Z","timestamp":1628458540000},"page":"5350","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Upgrading Behavioral Models for the Design of Digital Predistorters"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0879-5891","authenticated-orcid":false,"given":"Carlos","family":"Crespo-Cadenas","sequence":"first","affiliation":[{"name":"Departamento de Teor\u00eda de la Se\u00f1al y Comunicaciones, Escuela T\u00e9cnica Superior de Ingenier\u00eda, Universidad de Sevilla, Camino de los Descubrimientos, s\/n, 41092 Seville, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6614-2771","authenticated-orcid":false,"given":"Mar\u00eda Jos\u00e9","family":"Madero-Ayora","sequence":"additional","affiliation":[{"name":"Departamento de Teor\u00eda de la Se\u00f1al y Comunicaciones, Escuela T\u00e9cnica Superior de Ingenier\u00eda, Universidad de Sevilla, Camino de los Descubrimientos, s\/n, 41092 Seville, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4351-7830","authenticated-orcid":false,"given":"Juan A.","family":"Becerra","sequence":"additional","affiliation":[{"name":"Departamento de Teor\u00eda de la Se\u00f1al y Comunicaciones, Escuela T\u00e9cnica Superior de Ingenier\u00eda, Universidad de Sevilla, Camino de los Descubrimientos, s\/n, 41092 Seville, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2021,8,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1109\/MMM.2019.2904409","article-title":"Power Up Potential Power Amplifier Technologies for 5G Applications","volume":"20","author":"Qi","year":"2019","journal-title":"IEEE Microw. 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