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Express"],"published-print":{"date-parts":[[2025,8,25]]},"abstract":"<jats:p>Integrated sensing and communication (ISAC) is considered to be a pivotal trend in the development of the low-Earth-orbit (LEO) satellite networks. The previous demonstrations have faced challenges in accommodating significant Doppler frequency shifts of high-mobility environments. Therefore, in this work, a photonic-aided Doppler robust ISAC system is proposed and demonstrated. A chirp-multiplexed and index modulated linearly frequency modulated (IM-LFM) waveform is designed and generated by a dual polarization up-converter, which consists of a dual-wavelength laser, a circulator, a fiber Bragg grating (FBG), a dual parallel quadrature phase shift keying modulator (DP-QPSKM), a polarization beam splitter, and two high-speed photodetectors. A photonic dual polarization radar receiver is designed for dual channel de-chirp processing, while the communication reception and demodulation are implemented through down conversion and FFT operation. A 16.3-17.826 GHz IM-LFM waveform is experimentally generated and demonstrated for ISAC purposes. The sensing range resolution is better than 0.146 meters with a probability larger than 86%, and a 29.99-Mbps rate communication is achieved with a 500 kHz Doppler frequency shift. This scheme is particularly suitable for high-mobility ISAC applications.<\/jats:p>","DOI":"10.1364\/oe.564416","type":"journal-article","created":{"date-parts":[[2025,7,31]],"date-time":"2025-07-31T16:59:43Z","timestamp":1753981183000},"page":"35059","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Photonic-aided Doppler-robust ISAC system based on index modulation and chirp multiplexing"],"prefix":"10.1364","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0575-4640","authenticated-orcid":true,"given":"Zhou","family":"Yixiao","sequence":"first","affiliation":[{"name":"Air Force Engineering University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Li","family":"Xuan","sequence":"additional","affiliation":[{"name":"Air Force Engineering University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhao","family":"Shanghong","sequence":"additional","affiliation":[{"name":"Air Force Engineering University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8063-7631","authenticated-orcid":true,"given":"Wang","family":"Guodong","sequence":"additional","affiliation":[{"name":"Air Force Engineering University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wang","family":"Ruiqiong","sequence":"additional","affiliation":[{"name":"Air Force Engineering University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Meng","family":"Qingqing","sequence":"additional","affiliation":[{"name":"Air Force Engineering University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xie","family":"Lingrui","sequence":"additional","affiliation":[{"name":"Air Force Engineering University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qin","family":"Hao","sequence":"additional","affiliation":[{"name":"Air Force Engineering University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhu","family":"Zihang","sequence":"additional","affiliation":[{"name":"Air Force Engineering University"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"285","published-online":{"date-parts":[[2025,8,11]]},"reference":[{"key":"oe-33-17-35059-R1","doi-asserted-by":"publisher","first-page":"134","DOI":"10.1109\/MNET.001.1900287","volume":"34","author":"Saad","year":"2020","journal-title":"IEEE Network"},{"key":"oe-33-17-35059-R2","doi-asserted-by":"publisher","first-page":"3834","DOI":"10.1109\/TCOMM.2020.2973976","volume":"68","author":"Liu","year":"2020","journal-title":"IEEE Trans. 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