{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:BAGTQBNTWAIIWT7OTVYFFIKOG7","short_pith_number":"pith:BAGTQBNT","canonical_record":{"source":{"id":"1809.01022","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2018-09-04T14:31:42Z","cross_cats_sorted":["stat.ML"],"title_canon_sha256":"96f71f251392fb88f2d166e1a8a24c712b59302d1eeab1d333f8e51ae3877de2","abstract_canon_sha256":"214969341c1510000524306de0cd3c41fc2b009b6472f422897ab8383ae74a2b"},"schema_version":"1.0"},"canonical_sha256":"080d3805b3b0108b4fee9d7052a14e37e008d5bf0f4b83c5d83b1cfce5f48ca9","source":{"kind":"arxiv","id":"1809.01022","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.01022","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"arxiv_version","alias_value":"1809.01022v1","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.01022","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"pith_short_12","alias_value":"BAGTQBNTWAII","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"BAGTQBNTWAIIWT7O","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"BAGTQBNT","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:BAGTQBNTWAIIWT7OTVYFFIKOG7","target":"record","payload":{"canonical_record":{"source":{"id":"1809.01022","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2018-09-04T14:31:42Z","cross_cats_sorted":["stat.ML"],"title_canon_sha256":"96f71f251392fb88f2d166e1a8a24c712b59302d1eeab1d333f8e51ae3877de2","abstract_canon_sha256":"214969341c1510000524306de0cd3c41fc2b009b6472f422897ab8383ae74a2b"},"schema_version":"1.0"},"canonical_sha256":"080d3805b3b0108b4fee9d7052a14e37e008d5bf0f4b83c5d83b1cfce5f48ca9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:31.890655Z","signature_b64":"zVZ35ux93bGsSxENxfNPBcRNWp0GFEmJacQsq/ov/XMpdm0MdB+NgxZG4vEkHkMJj2Hsz/mvOVvsBPQmY3WTDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"080d3805b3b0108b4fee9d7052a14e37e008d5bf0f4b83c5d83b1cfce5f48ca9","last_reissued_at":"2026-05-18T00:06:31.890209Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:31.890209Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.01022","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:06:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"leXhSQJJugjVl3SL+oBP/+f1WK1ecVwZ0zzXOaDfUJdAeBuKHGiNO0zosrvHKGTfpxXeYAFOihUuF5NOTemrAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T22:39:49.248544Z"},"content_sha256":"4a0c98b3037126f12387fe1b388ab475885aa93adcdc641c1ac904fe06e1cf53","schema_version":"1.0","event_id":"sha256:4a0c98b3037126f12387fe1b388ab475885aa93adcdc641c1ac904fe06e1cf53"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:BAGTQBNTWAIIWT7OTVYFFIKOG7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Neural Network Aided Approach for LDPC Coded DCO-OFDM with Clipping Distortion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["stat.ML"],"primary_cat":"cs.LG","authors_text":"Chunming Zhao, Ming Jiang, Yuan He","submitted_at":"2018-09-04T14:31:42Z","abstract_excerpt":"In this paper, a neural network-aided bit-interleaved coded modulation (NN-BICM) receiver is designed to mitigate the nonlinear clipping distortion in the LDPC coded direct currentbiased optical orthogonal frequency division multiplexing (DCOOFDM) systems. Taking the cross-entropy as loss function, a feed forward network is trained by backpropagation algorithm to output the condition probability through the softmax activation function, thereby assisting in a modified log-likelihood ratio (LLR) improvement. To reduce the complexity, this feed-forward network simplifies the input layer with a si"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.01022","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:06:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sLGr2hRI2SMEV4s4Ah2kg+hxF9LaLAlzUKrJ3WzUjeBVQpV/HaPFX/iq8tEyduR9Rf72ra8KnrYEHX3lycp8Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T22:39:49.248892Z"},"content_sha256":"30c96ef7e6be8a7d687009588e323fd95fafd06a243265bb1c49a926540b2b11","schema_version":"1.0","event_id":"sha256:30c96ef7e6be8a7d687009588e323fd95fafd06a243265bb1c49a926540b2b11"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BAGTQBNTWAIIWT7OTVYFFIKOG7/bundle.json","state_url":"https://pith.science/pith/BAGTQBNTWAIIWT7OTVYFFIKOG7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BAGTQBNTWAIIWT7OTVYFFIKOG7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T22:39:49Z","links":{"resolver":"https://pith.science/pith/BAGTQBNTWAIIWT7OTVYFFIKOG7","bundle":"https://pith.science/pith/BAGTQBNTWAIIWT7OTVYFFIKOG7/bundle.json","state":"https://pith.science/pith/BAGTQBNTWAIIWT7OTVYFFIKOG7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BAGTQBNTWAIIWT7OTVYFFIKOG7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BAGTQBNTWAIIWT7OTVYFFIKOG7","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":"214969341c1510000524306de0cd3c41fc2b009b6472f422897ab8383ae74a2b","cross_cats_sorted":["stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2018-09-04T14:31:42Z","title_canon_sha256":"96f71f251392fb88f2d166e1a8a24c712b59302d1eeab1d333f8e51ae3877de2"},"schema_version":"1.0","source":{"id":"1809.01022","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.01022","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"arxiv_version","alias_value":"1809.01022v1","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.01022","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"pith_short_12","alias_value":"BAGTQBNTWAII","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"BAGTQBNTWAIIWT7O","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"BAGTQBNT","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:30c96ef7e6be8a7d687009588e323fd95fafd06a243265bb1c49a926540b2b11","target":"graph","created_at":"2026-05-18T00:06:31Z","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"},"paper":{"abstract_excerpt":"In this paper, a neural network-aided bit-interleaved coded modulation (NN-BICM) receiver is designed to mitigate the nonlinear clipping distortion in the LDPC coded direct currentbiased optical orthogonal frequency division multiplexing (DCOOFDM) systems. Taking the cross-entropy as loss function, a feed forward network is trained by backpropagation algorithm to output the condition probability through the softmax activation function, thereby assisting in a modified log-likelihood ratio (LLR) improvement. To reduce the complexity, this feed-forward network simplifies the input layer with a si","authors_text":"Chunming Zhao, Ming Jiang, Yuan He","cross_cats":["stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2018-09-04T14:31:42Z","title":"A Neural Network Aided Approach for LDPC Coded DCO-OFDM with Clipping Distortion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.01022","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":"sha256:4a0c98b3037126f12387fe1b388ab475885aa93adcdc641c1ac904fe06e1cf53","target":"record","created_at":"2026-05-18T00:06:31Z","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":"214969341c1510000524306de0cd3c41fc2b009b6472f422897ab8383ae74a2b","cross_cats_sorted":["stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2018-09-04T14:31:42Z","title_canon_sha256":"96f71f251392fb88f2d166e1a8a24c712b59302d1eeab1d333f8e51ae3877de2"},"schema_version":"1.0","source":{"id":"1809.01022","kind":"arxiv","version":1}},"canonical_sha256":"080d3805b3b0108b4fee9d7052a14e37e008d5bf0f4b83c5d83b1cfce5f48ca9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"080d3805b3b0108b4fee9d7052a14e37e008d5bf0f4b83c5d83b1cfce5f48ca9","first_computed_at":"2026-05-18T00:06:31.890209Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:31.890209Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zVZ35ux93bGsSxENxfNPBcRNWp0GFEmJacQsq/ov/XMpdm0MdB+NgxZG4vEkHkMJj2Hsz/mvOVvsBPQmY3WTDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:31.890655Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.01022","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a0c98b3037126f12387fe1b388ab475885aa93adcdc641c1ac904fe06e1cf53","sha256:30c96ef7e6be8a7d687009588e323fd95fafd06a243265bb1c49a926540b2b11"],"state_sha256":"808e480a7307444674c2967eb31c631170aa86a985bd5aaafb4cdfa365f93938"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NoYphmb716RrTgzspa75IPzwIkwamdqYbboyH2eDErDkXmutVI8GDh9jdGmZGuUEf8+IJjQ4D/Ynqdkn6Im2CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T22:39:49.250792Z","bundle_sha256":"bdb7a4544566fd21deb6ed34a0c32ff2456b3114dd7e039244a032da570d1391"}}