{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:ASFRQSZFMOBI55WYLC5EGC7H6P","short_pith_number":"pith:ASFRQSZF","schema_version":"1.0","canonical_sha256":"048b184b2563828ef6d858ba430be7f3e37c61b56a60da5c0a95d186d12c14a7","source":{"kind":"arxiv","id":"2102.13474","version":1},"attestation_state":"computed","paper":{"title":"DNN-assisted optical geometric constellation shaped PSK modulation for PAM4-to-QPSK format conversion gateway node","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"David S. Millar, Keisuke Kojima, Kieran Parsons, Takahiro Kodama, Toshiaki Koike-Akino","submitted_at":"2021-02-23T14:24:37Z","abstract_excerpt":"An optical gateway to convert four-level pulse amplitude modulation to quadrature phase shift keying modulation format having shaping gain was proposed for flexible intensity to phase mapping which exploits non-uniform phase noise. The power consumption of the optical modulation format conversion can save by making a DNN-based decision on the receiver side for the generated QPSK signal with non-uniform phase noise. A proof-of-principle experiment has shown that an optically geometric constellation shaped QPSK modulated signals generated from regular PAM4 signals with Gaussian-distributed noise"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2102.13474","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2021-02-23T14:24:37Z","cross_cats_sorted":[],"title_canon_sha256":"8d02d3af71520c0386de5e63e1067abca37f81bf2ed62ab3324970111fad30b2","abstract_canon_sha256":"66913c28da92daf65f7292fddbb45c0266b6681ac2d5bdf561a862bd91b2d285"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:11:24.056844Z","signature_b64":"YLD41L5sq3I5Y55Anzh5RFqfbTumFpT9T7NMjx02oxDuzlu2CN+OqEqWjVU1IoXD1Gx9r6TtsHChMnlzoqLYCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"048b184b2563828ef6d858ba430be7f3e37c61b56a60da5c0a95d186d12c14a7","last_reissued_at":"2026-07-05T04:11:24.056481Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:11:24.056481Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"DNN-assisted optical geometric constellation shaped PSK modulation for PAM4-to-QPSK format conversion gateway node","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"David S. Millar, Keisuke Kojima, Kieran Parsons, Takahiro Kodama, Toshiaki Koike-Akino","submitted_at":"2021-02-23T14:24:37Z","abstract_excerpt":"An optical gateway to convert four-level pulse amplitude modulation to quadrature phase shift keying modulation format having shaping gain was proposed for flexible intensity to phase mapping which exploits non-uniform phase noise. The power consumption of the optical modulation format conversion can save by making a DNN-based decision on the receiver side for the generated QPSK signal with non-uniform phase noise. A proof-of-principle experiment has shown that an optically geometric constellation shaped QPSK modulated signals generated from regular PAM4 signals with Gaussian-distributed noise"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.13474","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2102.13474/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2102.13474","created_at":"2026-07-05T04:11:24.056537+00:00"},{"alias_kind":"arxiv_version","alias_value":"2102.13474v1","created_at":"2026-07-05T04:11:24.056537+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.13474","created_at":"2026-07-05T04:11:24.056537+00:00"},{"alias_kind":"pith_short_12","alias_value":"ASFRQSZFMOBI","created_at":"2026-07-05T04:11:24.056537+00:00"},{"alias_kind":"pith_short_16","alias_value":"ASFRQSZFMOBI55WY","created_at":"2026-07-05T04:11:24.056537+00:00"},{"alias_kind":"pith_short_8","alias_value":"ASFRQSZF","created_at":"2026-07-05T04:11:24.056537+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ASFRQSZFMOBI55WYLC5EGC7H6P","json":"https://pith.science/pith/ASFRQSZFMOBI55WYLC5EGC7H6P.json","graph_json":"https://pith.science/api/pith-number/ASFRQSZFMOBI55WYLC5EGC7H6P/graph.json","events_json":"https://pith.science/api/pith-number/ASFRQSZFMOBI55WYLC5EGC7H6P/events.json","paper":"https://pith.science/paper/ASFRQSZF"},"agent_actions":{"view_html":"https://pith.science/pith/ASFRQSZFMOBI55WYLC5EGC7H6P","download_json":"https://pith.science/pith/ASFRQSZFMOBI55WYLC5EGC7H6P.json","view_paper":"https://pith.science/paper/ASFRQSZF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2102.13474&json=true","fetch_graph":"https://pith.science/api/pith-number/ASFRQSZFMOBI55WYLC5EGC7H6P/graph.json","fetch_events":"https://pith.science/api/pith-number/ASFRQSZFMOBI55WYLC5EGC7H6P/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ASFRQSZFMOBI55WYLC5EGC7H6P/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ASFRQSZFMOBI55WYLC5EGC7H6P/action/storage_attestation","attest_author":"https://pith.science/pith/ASFRQSZFMOBI55WYLC5EGC7H6P/action/author_attestation","sign_citation":"https://pith.science/pith/ASFRQSZFMOBI55WYLC5EGC7H6P/action/citation_signature","submit_replication":"https://pith.science/pith/ASFRQSZFMOBI55WYLC5EGC7H6P/action/replication_record"}},"created_at":"2026-07-05T04:11:24.056537+00:00","updated_at":"2026-07-05T04:11:24.056537+00:00"}