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To this end, we derive a performance bound on the communication function under a constraint on radar performance. To facilitate the analysis, in this paper, we consider a simplified situation where there is only one downlink user and one radar target. We analyze the properties of the performance bound and the corresponding waveform design strategy to achieve the bound. When the downlink user and the radar target meet certain conditions, we obtain analytical expressions for the bound and the corresponding waveform design strategy. The results reveal a tradeoff between communication and radar performance, which is essentially caused by the energy sharing and allocation between radar and communication functions of the system.<\/jats:p>","DOI":"10.1049\/2024\/8852387","type":"journal-article","created":{"date-parts":[[2024,9,20]],"date-time":"2024-09-20T18:37:53Z","timestamp":1726857473000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Energy Sharing and Performance Bounds in MIMO DFRC Systems: A Trade\u2010Off Analysis"],"prefix":"10.1049","volume":"2024","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-9240-3751","authenticated-orcid":false,"given":"Ziheng","family":"Zheng","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiang","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9043-6814","authenticated-orcid":false,"given":"Tianyao","family":"Huang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yimin","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4358-5304","authenticated-orcid":false,"given":"Yonina C.","family":"Eldar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"265","published-online":{"date-parts":[[2024,9,20]]},"reference":[{"key":"e_1_2_12_1_2","doi-asserted-by":"publisher","DOI":"10.1109\/MAES.2016.150225"},{"key":"e_1_2_12_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/TSP.2018.2831624"},{"key":"e_1_2_12_3_2","doi-asserted-by":"publisher","DOI":"10.1109\/TCSII.2018.2822845"},{"key":"e_1_2_12_4_2","doi-asserted-by":"publisher","DOI":"10.1109\/TSP.2021.3121090"},{"key":"e_1_2_12_5_2","doi-asserted-by":"publisher","DOI":"10.1109\/TSP.2015.2483485"},{"key":"e_1_2_12_6_2","doi-asserted-by":"publisher","DOI":"10.1109\/MSP.2020.2983832"},{"key":"e_1_2_12_7_2","doi-asserted-by":"publisher","DOI":"10.1109\/MSP.2019.2907329"},{"key":"e_1_2_12_8_2","doi-asserted-by":"publisher","DOI":"10.1109\/JSAC.2022.3156632"},{"key":"e_1_2_12_9_2","doi-asserted-by":"publisher","DOI":"10.1109\/JPROC.2011.2131110"},{"key":"e_1_2_12_10_2","doi-asserted-by":"publisher","DOI":"10.1109\/ACCESS.2016.2530979"},{"key":"e_1_2_12_11_2","doi-asserted-by":"crossref","unstructured":"LiuX. 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