{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,18]],"date-time":"2026-07-18T16:06:47Z","timestamp":1784390807266,"version":"3.55.0"},"reference-count":41,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2012,5,25]],"date-time":"2012-05-25T00:00:00Z","timestamp":1337904000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This paper is focused on the description of the physical layer of a new acoustic modem called ITACA. The modem architecture includes as a major novelty an ultra-low power asynchronous wake-up system implementation for underwater acoustic transmission that is based on a low-cost off-the-shelf RFID peripheral integrated circuit. This feature enables a reduced power dissipation of 10 \u00b5W in stand-by mode and registers very low power values during reception and transmission. The modem also incorporates clear channel assessment (CCA) to support CSMA-based medium access control (MAC) layer protocols. The design is part of a compact platform for a long-life short\/medium range underwater wireless sensor network.<\/jats:p>","DOI":"10.3390\/s120606837","type":"journal-article","created":{"date-parts":[[2012,5,25]],"date-time":"2012-05-25T11:15:22Z","timestamp":1337944522000},"page":"6837-6856","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":57,"title":["An Ultra-Low Power and Flexible Acoustic Modem Design to Develop Energy-Efficient Underwater Sensor Networks"],"prefix":"10.3390","volume":"12","author":[{"given":"Antonio","family":"S\u00e1nchez","sequence":"first","affiliation":[{"name":"Instituto ITACA, Universitat Polit\u00e8cnica de Val\u00e8ncia, Camino de Vera s\/n 46022, Valencia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sara","family":"Blanc","sequence":"additional","affiliation":[{"name":"Instituto ITACA, Universitat Polit\u00e8cnica de Val\u00e8ncia, Camino de Vera s\/n 46022, Valencia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro","family":"Yuste","sequence":"additional","affiliation":[{"name":"Instituto ITACA, Universitat Polit\u00e8cnica de Val\u00e8ncia, Camino de Vera s\/n 46022, Valencia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5782-4284","authenticated-orcid":false,"given":"Angel","family":"Perles","sequence":"additional","affiliation":[{"name":"Instituto ITACA, Universitat Polit\u00e8cnica de Val\u00e8ncia, Camino de Vera s\/n 46022, Valencia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan Jos\u00e9","family":"Serrano","sequence":"additional","affiliation":[{"name":"Instituto ITACA, Universitat Polit\u00e8cnica de Val\u00e8ncia, Camino de Vera s\/n 46022, Valencia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2012,5,25]]},"reference":[{"key":"ref_1","unstructured":"SPICOSA Available online: www.spicosa.eu (accessed on 3 April 2012)."},{"key":"ref_2","unstructured":"SEMAT Available online: http:\/\/www.gpem.uq.edu.au\/csl-semat-about (accessed on 3 April 2012)."},{"key":"ref_3","unstructured":"Britton, M., and Sacks, L. 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