{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:TKIJXGUUY2CRJA6SWHOXSXPFFV","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"176a60c07c960074fa046da50c8d248a8c88afb6a36ca0d02442f2cb86f96896","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"eess.SP","submitted_at":"2025-12-18T13:03:54Z","title_canon_sha256":"e07475387d28587e8490d3546803567632c4599d9ad544e551b7275f1c3d006e"},"schema_version":"1.0","source":{"id":"2512.16496","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2512.16496","created_at":"2026-07-16T01:22:31Z"},{"alias_kind":"arxiv_version","alias_value":"2512.16496v1","created_at":"2026-07-16T01:22:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.16496","created_at":"2026-07-16T01:22:31Z"},{"alias_kind":"pith_short_12","alias_value":"TKIJXGUUY2CR","created_at":"2026-07-16T01:22:31Z"},{"alias_kind":"pith_short_16","alias_value":"TKIJXGUUY2CRJA6S","created_at":"2026-07-16T01:22:31Z"},{"alias_kind":"pith_short_8","alias_value":"TKIJXGUU","created_at":"2026-07-16T01:22:31Z"}],"graph_snapshots":[{"event_id":"sha256:5f1e1a03cb181004d26b942dc1c9bb868bc1015a954256867ced62e5158646c6","target":"graph","created_at":"2026-07-16T01:22:31Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2512.16496/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this work, a novel receiver architecture for orthogonal frequency division multiplexing (OFDM) communications in 6G high-mobility scenarios is developed. In particular, a delay-Doppler superimposed pilot (SP) scheme is used for channel estimation (CE) by adding a single pilot in the delay-Doppler domain. Unlike previous research on delay-Doppler superimposed pilots in OFDM systems, intercarrier interference (ICI) effects, fractional delays, and Doppler shifts are considered. Consequently, a disjoint fractional delay-Doppler estimation algorithm is derived, and a reduced-complexity equalizat","authors_text":"Mauro Marchese, Pietro Savazzi","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"eess.SP","submitted_at":"2025-12-18T13:03:54Z","title":"Robust 6G OFDM High-Mobility Communications Using Delay-Doppler Superimposed Pilots"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2512.16496","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:a0cb0fe55ad12530bcf9f01a08e4cccb301f61114338db36183f3953493298b3","target":"record","created_at":"2026-07-16T01:22:31Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"176a60c07c960074fa046da50c8d248a8c88afb6a36ca0d02442f2cb86f96896","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"eess.SP","submitted_at":"2025-12-18T13:03:54Z","title_canon_sha256":"e07475387d28587e8490d3546803567632c4599d9ad544e551b7275f1c3d006e"},"schema_version":"1.0","source":{"id":"2512.16496","kind":"arxiv","version":1}},"canonical_sha256":"9a909b9a94c6851483d2b1dd795de52d76e3f3737a14cbafcf66b08c25e0e11c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a909b9a94c6851483d2b1dd795de52d76e3f3737a14cbafcf66b08c25e0e11c","first_computed_at":"2026-07-16T01:22:31.945475Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-16T01:22:31.945475Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QSuwdCTjiU8PNhqvQcEVqMPfpBFX4Poj8+FdRWYpJHZ+JTxkQjVznZTrpK68e3JdKgA/yXHesdUwLQ4MfiP5AA==","signature_status":"signed_v1","signed_at":"2026-07-16T01:22:31.946537Z","signed_message":"canonical_sha256_bytes"},"source_id":"2512.16496","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a0cb0fe55ad12530bcf9f01a08e4cccb301f61114338db36183f3953493298b3","sha256:5f1e1a03cb181004d26b942dc1c9bb868bc1015a954256867ced62e5158646c6"],"state_sha256":"4c73f4a7b4e5cd89efd2e25f6bc85c141f2ca5d91891cef42e2c0f9d51303b6c"}