{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:LF4F3YP67BXJMYZ3AAG2NFLOUT","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":"6c66d55d9dff0f246b31045b01ad70886b9ac883c87024ab2960ea55b4409152","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-05-12T16:22:45Z","title_canon_sha256":"fb6a3b23116886fb5b5278178b81f53b8497419d872f5c68873dfefaf07a7244"},"schema_version":"1.0","source":{"id":"2505.07717","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.07717","created_at":"2026-07-05T11:09:13Z"},{"alias_kind":"arxiv_version","alias_value":"2505.07717v2","created_at":"2026-07-05T11:09:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.07717","created_at":"2026-07-05T11:09:13Z"},{"alias_kind":"pith_short_12","alias_value":"LF4F3YP67BXJ","created_at":"2026-07-05T11:09:13Z"},{"alias_kind":"pith_short_16","alias_value":"LF4F3YP67BXJMYZ3","created_at":"2026-07-05T11:09:13Z"},{"alias_kind":"pith_short_8","alias_value":"LF4F3YP6","created_at":"2026-07-05T11:09:13Z"}],"graph_snapshots":[{"event_id":"sha256:63fac16eaf9937993d9f454ad64804266846a0263af6eb5eb8a0d21e32989ae1","target":"graph","created_at":"2026-07-05T11:09:13Z","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/2505.07717/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Extremely large-scale multiple-input multiple-output (XL-MIMO) enables the formation of narrow beams, effectively mitigating path loss in high-frequency communications. This capability makes the integration of wideband high-frequency communications and XL-MIMO a key enabler for future 6G networks. Realizing the full potential of such wideband XL-MIMO systems depends critically on acquiring accurate channel state information. However, channel estimation is significantly challenging due to inherent wideband XL-MIMO channel characteristics, including near-field propagation, beam split, and spatia","authors_text":"Peicong Zheng, Xuantao Lyu, Ye Wang, Yi Gong","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-05-12T16:22:45Z","title":"Channel Estimation for Wideband XL-MIMO: A Constrained Deep Unrolling Approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.07717","kind":"arxiv","version":2},"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":"sha256:70d25fdc7406064fb594fcfc00c0b957a4c3256ab1a03ee92ce1103011107c71","target":"record","created_at":"2026-07-05T11:09:13Z","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":"6c66d55d9dff0f246b31045b01ad70886b9ac883c87024ab2960ea55b4409152","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-05-12T16:22:45Z","title_canon_sha256":"fb6a3b23116886fb5b5278178b81f53b8497419d872f5c68873dfefaf07a7244"},"schema_version":"1.0","source":{"id":"2505.07717","kind":"arxiv","version":2}},"canonical_sha256":"59785de1fef86e96633b000da6956ea4dd50e601fae2b146e00190f1bd760b86","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"59785de1fef86e96633b000da6956ea4dd50e601fae2b146e00190f1bd760b86","first_computed_at":"2026-07-05T11:09:13.236727Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:09:13.236727Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7Ln4JrUGZpcqB28GNGy7xkY9kPSXlcxDP2Ww5HWGJB76O3zK2bWi94o6qnFBMpN0ZsUBhEeBc7nF2Xg3YLN9CQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:09:13.237257Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.07717","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:70d25fdc7406064fb594fcfc00c0b957a4c3256ab1a03ee92ce1103011107c71","sha256:63fac16eaf9937993d9f454ad64804266846a0263af6eb5eb8a0d21e32989ae1"],"state_sha256":"8ccb39af16f38896afff4e9fb396a1111ac9ef74332f4b1867af41071ad6b57d"}