{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:ZZFEL6JVWSMZSBV4AKXW4AJR7T","short_pith_number":"pith:ZZFEL6JV","schema_version":"1.0","canonical_sha256":"ce4a45f935b4999906bc02af6e0131fce94ca589a2144d4b2bfbe21d41bc58da","source":{"kind":"arxiv","id":"1806.06420","version":1},"attestation_state":"computed","paper":{"title":"Comparison of DCO-OFDM and M-PAM for LED-Based Communication Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Jie Lian, Maite Brandt-Pearce, Mohammad Noshad","submitted_at":"2018-06-17T17:47:20Z","abstract_excerpt":"Light-emitting diode (LED)-based communications, such as visible light communications (VLC) and infrared (IR) communications, are candidate techniques to provide short-range and high-speed data transmission. In this paper, M-ary pulse amplitude modulation (M-PAM), used as a high bandwidth efficiency scheme, is compared with an optimized DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) scheme. Considering the bandwidth limit and constrained peak transmitted power characteristics of LEDs, a bit loading algorithm with an optimized modulation index is used for the DCO-OFDM. "},"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":"1806.06420","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-06-17T17:47:20Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"178194f38ed1761ace453bc2b48de81286b2c5e9b7c0f9eddc8801c088130f25","abstract_canon_sha256":"3b3406c888386a095eefe829a15aafab89e67f8e54e20f5f7c736d850cecfd3a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:13:02.495228Z","signature_b64":"sseLFtUaSWtI1F8syoGB90aEDdElSwEzujXjFnJvNZE27HRTffig69jUtS23c3nKWYfImIhLpXhDO285Fq9cDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ce4a45f935b4999906bc02af6e0131fce94ca589a2144d4b2bfbe21d41bc58da","last_reissued_at":"2026-05-18T00:13:02.494572Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:13:02.494572Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Comparison of DCO-OFDM and M-PAM for LED-Based Communication Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Jie Lian, Maite Brandt-Pearce, Mohammad Noshad","submitted_at":"2018-06-17T17:47:20Z","abstract_excerpt":"Light-emitting diode (LED)-based communications, such as visible light communications (VLC) and infrared (IR) communications, are candidate techniques to provide short-range and high-speed data transmission. In this paper, M-ary pulse amplitude modulation (M-PAM), used as a high bandwidth efficiency scheme, is compared with an optimized DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) scheme. Considering the bandwidth limit and constrained peak transmitted power characteristics of LEDs, a bit loading algorithm with an optimized modulation index is used for the DCO-OFDM. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.06420","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1806.06420","created_at":"2026-05-18T00:13:02.494659+00:00"},{"alias_kind":"arxiv_version","alias_value":"1806.06420v1","created_at":"2026-05-18T00:13:02.494659+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.06420","created_at":"2026-05-18T00:13:02.494659+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZZFEL6JVWSMZ","created_at":"2026-05-18T12:33:07.085635+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZZFEL6JVWSMZSBV4","created_at":"2026-05-18T12:33:07.085635+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZZFEL6JV","created_at":"2026-05-18T12:33:07.085635+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/ZZFEL6JVWSMZSBV4AKXW4AJR7T","json":"https://pith.science/pith/ZZFEL6JVWSMZSBV4AKXW4AJR7T.json","graph_json":"https://pith.science/api/pith-number/ZZFEL6JVWSMZSBV4AKXW4AJR7T/graph.json","events_json":"https://pith.science/api/pith-number/ZZFEL6JVWSMZSBV4AKXW4AJR7T/events.json","paper":"https://pith.science/paper/ZZFEL6JV"},"agent_actions":{"view_html":"https://pith.science/pith/ZZFEL6JVWSMZSBV4AKXW4AJR7T","download_json":"https://pith.science/pith/ZZFEL6JVWSMZSBV4AKXW4AJR7T.json","view_paper":"https://pith.science/paper/ZZFEL6JV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1806.06420&json=true","fetch_graph":"https://pith.science/api/pith-number/ZZFEL6JVWSMZSBV4AKXW4AJR7T/graph.json","fetch_events":"https://pith.science/api/pith-number/ZZFEL6JVWSMZSBV4AKXW4AJR7T/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZZFEL6JVWSMZSBV4AKXW4AJR7T/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZZFEL6JVWSMZSBV4AKXW4AJR7T/action/storage_attestation","attest_author":"https://pith.science/pith/ZZFEL6JVWSMZSBV4AKXW4AJR7T/action/author_attestation","sign_citation":"https://pith.science/pith/ZZFEL6JVWSMZSBV4AKXW4AJR7T/action/citation_signature","submit_replication":"https://pith.science/pith/ZZFEL6JVWSMZSBV4AKXW4AJR7T/action/replication_record"}},"created_at":"2026-05-18T00:13:02.494659+00:00","updated_at":"2026-05-18T00:13:02.494659+00:00"}