{"ID":2866031,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2509.21162","arxiv_id":"2509.21162","title":"A Secure ISAC Waveform Design Framework via Random Frequency and PRI Agility","abstract":"This paper presents a novel framework for enhancing the security, data rate, and sensing performance of integrated sensing and communications (ISAC) systems. We employ a random frequency and pulse repetition interval (PRI) agility (RFPA) method for the waveform design, where the necessary random sequences are governed by shared secrets. These secrets, which can be pre-shared or generated via channel reciprocity, obfuscate critical radar parameters like Doppler frequency and pulse start times, thereby significantly impeding the ability to perform reconnaissance from a passive adversary without the secret key. To further introduce enhanced data throughput, we also introduce a hybrid information embedding scheme that integrates amplitude shift keying (ASK), phase shift keying (PSK), index modulation (IM), and spatial modulation (SM), for which a low-complexity sparse-matched filter receiver is proposed for accurate decoding with practical complexity. Finally, the excellent range-velocity resolution and clutter suppression of the proposed waveform are analyzed via the ambiguity function (AF).","short_abstract":"This paper presents a novel framework for enhancing the security, data rate, and sensing performance of integrated sensing and communications (ISAC) systems. We employ a random frequency and pulse repetition interval (PRI) agility (RFPA) method for the waveform design, where the necessary random sequences are governed...","url_abs":"https://arxiv.org/abs/2509.21162","url_pdf":"https://arxiv.org/pdf/2509.21162v1","authors":"[\"Ali Khandan Boroujeni\",\"Hyeon Seok Rou\",\"Ghazal Bagheri\",\"Giuseppe Thadeu Freitas de Abreu\",\"Stefan Köpsell\",\"Kuranage Roche Rayan Ranasinghe\",\"Rafael F. Schaefer\"]","published":"2025-09-25T13:48:00Z","proceeding":"eess.SP","tasks":"[\"eess.SP\"]","methods":"[]","has_code":false}