{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:UZXWIXXNDBT6U73SJMP72A5YBL","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":"f957b93d6b382bfcd93e4bfd42ca74ceb1c272d77c82a455491289d4e039e7fd","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-29T07:25:06Z","title_canon_sha256":"93a89d71d07bcfceb0cd0c8cfb7453a2bfa71a896929098f25027e21677611a2"},"schema_version":"1.0","source":{"id":"1705.00143","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.00143","created_at":"2026-05-18T00:45:21Z"},{"alias_kind":"arxiv_version","alias_value":"1705.00143v1","created_at":"2026-05-18T00:45:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.00143","created_at":"2026-05-18T00:45:21Z"},{"alias_kind":"pith_short_12","alias_value":"UZXWIXXNDBT6","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"UZXWIXXNDBT6U73S","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"UZXWIXXN","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:090d2512f508f46f3245a89deae0878c5e4fede2546df96432cb5c1494c1defb","target":"graph","created_at":"2026-05-18T00:45:21Z","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":"Time-domain chromatic dispersion (CD) equalization using finite impulse response (FIR) filter is now a common approach for coherent optical fiber communication systems. The complex weights of FIR filter taps are calculated from a truncated impulse response of the CD transfer function, and the modulus of the complex weights is constant. In our work, we take the limited bandwidth of a single channel signal into account and propose weighted FIR filters to improve the performance of CD equalization. A raised cosine FIR filter and a Gaussian FIR filter are investigated in our work. The optimization","authors_text":"Aiying Yang, Lihui Feng, Peng Guo, Ziyi Zeng","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-29T07:25:06Z","title":"Weighted finite impulse response filter for chromatic dispersion equalization in coherent optical fiber communication systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.00143","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:bdea95bed0f05378943c99d182a32d0c86e0971461d6276ed298629e40764aea","target":"record","created_at":"2026-05-18T00:45:21Z","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":"f957b93d6b382bfcd93e4bfd42ca74ceb1c272d77c82a455491289d4e039e7fd","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-29T07:25:06Z","title_canon_sha256":"93a89d71d07bcfceb0cd0c8cfb7453a2bfa71a896929098f25027e21677611a2"},"schema_version":"1.0","source":{"id":"1705.00143","kind":"arxiv","version":1}},"canonical_sha256":"a66f645eed1867ea7f724b1ffd03b80ae10a02766d9d61312c69e236895a9929","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a66f645eed1867ea7f724b1ffd03b80ae10a02766d9d61312c69e236895a9929","first_computed_at":"2026-05-18T00:45:21.343438Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:21.343438Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8Vpqn6uPq/7xvUWnpbBhiTARUNIlaj2VvC5p6VBnBF5CrhE4NR+W9uJmHukLgGjl1BjKZg6/0Z10XCL5HQXDAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:21.344069Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.00143","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bdea95bed0f05378943c99d182a32d0c86e0971461d6276ed298629e40764aea","sha256:090d2512f508f46f3245a89deae0878c5e4fede2546df96432cb5c1494c1defb"],"state_sha256":"0a090eb8c7fdf84f155feeb7e0ddc4f2c1ffb16488840870d911e3d43df61408"}