{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:QUZ5AXNT4XC44COL5CEJX6YK54","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":"297943bd8e4ec125ccd859c69c7b140abaa2450489451220cbdcb4550eae991d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-05-21T07:49:34Z","title_canon_sha256":"8754407cd88d4228b09a374da687e61638d38421180f91609191653a2a90a38a"},"schema_version":"1.0","source":{"id":"2605.22117","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.22117","created_at":"2026-05-22T01:04:26Z"},{"alias_kind":"arxiv_version","alias_value":"2605.22117v1","created_at":"2026-05-22T01:04:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.22117","created_at":"2026-05-22T01:04:26Z"},{"alias_kind":"pith_short_12","alias_value":"QUZ5AXNT4XC4","created_at":"2026-05-22T01:04:26Z"},{"alias_kind":"pith_short_16","alias_value":"QUZ5AXNT4XC44COL","created_at":"2026-05-22T01:04:26Z"},{"alias_kind":"pith_short_8","alias_value":"QUZ5AXNT","created_at":"2026-05-22T01:04:26Z"}],"graph_snapshots":[{"event_id":"sha256:0fa4e9f2962d8b5ee2915ca5b21feff73a6e4ec82d9e47d695341646a7ac5910","target":"graph","created_at":"2026-05-22T01:04:26Z","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/2605.22117/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Extremely large aperture arrays (ELAAs) and millimeter-wave (mmWave) technologies are essential for achieving high data rates in future wireless communication systems. To perform precise beamforming, these systems require accurate channel estimation, in which the near-field wavefront curvature effect must be taken into account. Existing channel estimation methods rely on the spherical wavefront channel (SWC) model, which is suitable for near-field propagation with point sources, scatterers, and reflection planes. However, when a near-field curved reflecting surface exists, the wavefront of the","authors_text":"Heling Zhang, Shidong Zhou, Xiaofeng Zhong, Xiujun Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-05-21T07:49:34Z","title":"Beyond Spherical Wavefront: Near-Field Channel Estimation Under Wavefront Anisotropy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.22117","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:df1c797719b52ab03dea32c0521b9afc8d0cd98f47fd544b3265bbb39bc3ee34","target":"record","created_at":"2026-05-22T01:04:26Z","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":"297943bd8e4ec125ccd859c69c7b140abaa2450489451220cbdcb4550eae991d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-05-21T07:49:34Z","title_canon_sha256":"8754407cd88d4228b09a374da687e61638d38421180f91609191653a2a90a38a"},"schema_version":"1.0","source":{"id":"2605.22117","kind":"arxiv","version":1}},"canonical_sha256":"8533d05db3e5c5ce09cbe8889bfb0aef230e4853a309ecda92f126b2e08218e5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8533d05db3e5c5ce09cbe8889bfb0aef230e4853a309ecda92f126b2e08218e5","first_computed_at":"2026-05-22T01:04:26.716443Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-22T01:04:26.716443Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lfG/+SIFyyp5PMdjCiDAGTPSCF5FsgYEoCt6NeK6X4DmOfDL+rf/XhjSZihXEtzGelnva3c1qgKAwLipVy81AA==","signature_status":"signed_v1","signed_at":"2026-05-22T01:04:26.717213Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.22117","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df1c797719b52ab03dea32c0521b9afc8d0cd98f47fd544b3265bbb39bc3ee34","sha256:0fa4e9f2962d8b5ee2915ca5b21feff73a6e4ec82d9e47d695341646a7ac5910"],"state_sha256":"6cc946ac5dc8c3bee11b3b512fdeebf3a2c7a2bb43ba4912e042320e18a2c78e"}