{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:RHXYRMF2NP3XDAOUAE7C43SAS5","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":"5d86b2635506d13c8b0d43cccb43274b22162ce748826b824f9ef2829f55b28f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-07T14:48:28Z","title_canon_sha256":"38c669def8d5b84d571c76bb4f8271c02fac7c995b33d8657cb07211df05cf78"},"schema_version":"1.0","source":{"id":"1811.02915","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.02915","created_at":"2026-05-18T00:01:20Z"},{"alias_kind":"arxiv_version","alias_value":"1811.02915v1","created_at":"2026-05-18T00:01:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.02915","created_at":"2026-05-18T00:01:20Z"},{"alias_kind":"pith_short_12","alias_value":"RHXYRMF2NP3X","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RHXYRMF2NP3XDAOU","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RHXYRMF2","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:cc9b881b654e073344064de61d4827e1205f15a289ca87710c788e8fd5bb112a","target":"graph","created_at":"2026-05-18T00:01:20Z","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"},"paper":{"abstract_excerpt":"Kernel adaptive filtering (KAF) is proposed for nonlinearity-tolerant optical direct detection. For 7x128Gbit/s PAM4 transmission over 33.6km 7-core-fiber, KAF only needs 10 equalizer taps to reach KP4-FEC limit (BER@2.2e-4), whereas decision-feedback-equalizer needs 43 equalizer taps to reach HD-FEC limit (BER@3.8e-3).","authors_text":"Aleksejs Udalcovs, Anders Djupsj\\\"obacka, Deming Liu, Gunnar Jacobsen, Jiajia Chen, Jonas M{\\aa}rtensson, Lin Gan, Lu Zhang, Ming Tang, Oskars Ozolins, Richard Schatz, Rui Lin, Sergei Popov, Shilin Xiao, Sonnian Fu, Urban Westergren, Weijun Tong, Weisheng Hu, Xiaodan Pang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-07T14:48:28Z","title":"Kernel Adaptive Filtering for Nonlinearity-Tolerant Optical Direct Detection Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.02915","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:e82a46bd7a12b989656a0f906866488139aaa2bfb641e1373be4adf6b9e34809","target":"record","created_at":"2026-05-18T00:01:20Z","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":"5d86b2635506d13c8b0d43cccb43274b22162ce748826b824f9ef2829f55b28f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-07T14:48:28Z","title_canon_sha256":"38c669def8d5b84d571c76bb4f8271c02fac7c995b33d8657cb07211df05cf78"},"schema_version":"1.0","source":{"id":"1811.02915","kind":"arxiv","version":1}},"canonical_sha256":"89ef88b0ba6bf77181d4013e2e6e40974db0cc088e9f9133f762f7dd5c3379d7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"89ef88b0ba6bf77181d4013e2e6e40974db0cc088e9f9133f762f7dd5c3379d7","first_computed_at":"2026-05-18T00:01:20.430137Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:01:20.430137Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jJE3hFnnrzaKZfQ0aoJzf/1QR/10C7XjF+qRjN7uvFwgxLGEs5rBawCOFOe++aOuMJAro5qVtjGqlx6OziU1Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:01:20.430750Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.02915","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e82a46bd7a12b989656a0f906866488139aaa2bfb641e1373be4adf6b9e34809","sha256:cc9b881b654e073344064de61d4827e1205f15a289ca87710c788e8fd5bb112a"],"state_sha256":"824eb5298774f3ef829dbe219070ababdfc424da8fef7d21772d2425936919d5"}