{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:UV4TV7PLXB74VUGSCMCK5D5MD3","short_pith_number":"pith:UV4TV7PL","canonical_record":{"source":{"id":"1602.08765","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-02-28T20:51:35Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"f842d62cd885c4437634c1c0cfe60d8897a991c00228bac4e6bfd8f47162bf2e","abstract_canon_sha256":"53a9d4762d20be81d851f4e2bd7335d400b13e72883359f37f7f464a13150f6f"},"schema_version":"1.0"},"canonical_sha256":"a5793afdebb87fcad0d21304ae8fac1ed29ad9b92466d9486b59c0a03a489ac7","source":{"kind":"arxiv","id":"1602.08765","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.08765","created_at":"2026-05-18T01:19:51Z"},{"alias_kind":"arxiv_version","alias_value":"1602.08765v1","created_at":"2026-05-18T01:19:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.08765","created_at":"2026-05-18T01:19:51Z"},{"alias_kind":"pith_short_12","alias_value":"UV4TV7PLXB74","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"UV4TV7PLXB74VUGS","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"UV4TV7PL","created_at":"2026-05-18T12:30:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:UV4TV7PLXB74VUGSCMCK5D5MD3","target":"record","payload":{"canonical_record":{"source":{"id":"1602.08765","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-02-28T20:51:35Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"f842d62cd885c4437634c1c0cfe60d8897a991c00228bac4e6bfd8f47162bf2e","abstract_canon_sha256":"53a9d4762d20be81d851f4e2bd7335d400b13e72883359f37f7f464a13150f6f"},"schema_version":"1.0"},"canonical_sha256":"a5793afdebb87fcad0d21304ae8fac1ed29ad9b92466d9486b59c0a03a489ac7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:51.981860Z","signature_b64":"bEQUuX0UC+77jqPR1yzDctU0Bu8ChcVhPjb1SHyCKkBRhQGxDEiOnf3zPKOxHQcgQb0KRcGiGgw3e4r5qPpIDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a5793afdebb87fcad0d21304ae8fac1ed29ad9b92466d9486b59c0a03a489ac7","last_reissued_at":"2026-05-18T01:19:51.981216Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:51.981216Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.08765","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":"2026-05-18T01:19:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oCj2kfguNYLeVg4xuYkw0V71bxVDJl/xOVXeWeN9791zYJpCCE0B9ROgCakD/8xc+dq2TrBpn2w24Qi1dGlQCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T21:52:55.963727Z"},"content_sha256":"043bb3a00600570b57d89d7661f6488790594c0094cce94267ec6984315163ba","schema_version":"1.0","event_id":"sha256:043bb3a00600570b57d89d7661f6488790594c0094cce94267ec6984315163ba"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:UV4TV7PLXB74VUGSCMCK5D5MD3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Designing A Dimmable OPPM-Based VLC System Under Channel Constraints","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Akbar Dargahi, Ata Chizari, Jawad A. Salehi, Mohammad Vahid Jamali","submitted_at":"2016-02-28T20:51:35Z","abstract_excerpt":"In this paper, we design a dimming compatible visible light communication (VLC) system in a standard office room according to illumination standards under channel constraints. We use overlapping pulse position modulation (OPPM) to support dimming control by changing the code weights. The system parameters such as a valid interval for dimming together with an upper bound for bit rate according to the channel delay spread are investigated. Moreover, considering the dispersive VLC channel and using Monte Carlo (MC) simulations, a method is proposed to determine the minimum code length in differen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.08765","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":"2026-05-18T01:19:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KcOzvcFktpZd9exUIbR5da++K5ikGRJ7WLU6Ei5zkO/NmPouq53MckYY1oQqlt7nRHY+rppjjZf6Q6Pz8FV2Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T21:52:55.964063Z"},"content_sha256":"b2c28c773035d62594bdf37fc24da6fcedb0996a9c8071908c6c2370360ad029","schema_version":"1.0","event_id":"sha256:b2c28c773035d62594bdf37fc24da6fcedb0996a9c8071908c6c2370360ad029"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UV4TV7PLXB74VUGSCMCK5D5MD3/bundle.json","state_url":"https://pith.science/pith/UV4TV7PLXB74VUGSCMCK5D5MD3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UV4TV7PLXB74VUGSCMCK5D5MD3/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":"2026-06-28T21:52:55Z","links":{"resolver":"https://pith.science/pith/UV4TV7PLXB74VUGSCMCK5D5MD3","bundle":"https://pith.science/pith/UV4TV7PLXB74VUGSCMCK5D5MD3/bundle.json","state":"https://pith.science/pith/UV4TV7PLXB74VUGSCMCK5D5MD3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UV4TV7PLXB74VUGSCMCK5D5MD3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:UV4TV7PLXB74VUGSCMCK5D5MD3","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":"53a9d4762d20be81d851f4e2bd7335d400b13e72883359f37f7f464a13150f6f","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-02-28T20:51:35Z","title_canon_sha256":"f842d62cd885c4437634c1c0cfe60d8897a991c00228bac4e6bfd8f47162bf2e"},"schema_version":"1.0","source":{"id":"1602.08765","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.08765","created_at":"2026-05-18T01:19:51Z"},{"alias_kind":"arxiv_version","alias_value":"1602.08765v1","created_at":"2026-05-18T01:19:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.08765","created_at":"2026-05-18T01:19:51Z"},{"alias_kind":"pith_short_12","alias_value":"UV4TV7PLXB74","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"UV4TV7PLXB74VUGS","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"UV4TV7PL","created_at":"2026-05-18T12:30:46Z"}],"graph_snapshots":[{"event_id":"sha256:b2c28c773035d62594bdf37fc24da6fcedb0996a9c8071908c6c2370360ad029","target":"graph","created_at":"2026-05-18T01:19:51Z","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, we design a dimming compatible visible light communication (VLC) system in a standard office room according to illumination standards under channel constraints. We use overlapping pulse position modulation (OPPM) to support dimming control by changing the code weights. The system parameters such as a valid interval for dimming together with an upper bound for bit rate according to the channel delay spread are investigated. Moreover, considering the dispersive VLC channel and using Monte Carlo (MC) simulations, a method is proposed to determine the minimum code length in differen","authors_text":"Akbar Dargahi, Ata Chizari, Jawad A. Salehi, Mohammad Vahid Jamali","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-02-28T20:51:35Z","title":"Designing A Dimmable OPPM-Based VLC System Under Channel Constraints"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.08765","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":"sha256:043bb3a00600570b57d89d7661f6488790594c0094cce94267ec6984315163ba","target":"record","created_at":"2026-05-18T01:19:51Z","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":"53a9d4762d20be81d851f4e2bd7335d400b13e72883359f37f7f464a13150f6f","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-02-28T20:51:35Z","title_canon_sha256":"f842d62cd885c4437634c1c0cfe60d8897a991c00228bac4e6bfd8f47162bf2e"},"schema_version":"1.0","source":{"id":"1602.08765","kind":"arxiv","version":1}},"canonical_sha256":"a5793afdebb87fcad0d21304ae8fac1ed29ad9b92466d9486b59c0a03a489ac7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a5793afdebb87fcad0d21304ae8fac1ed29ad9b92466d9486b59c0a03a489ac7","first_computed_at":"2026-05-18T01:19:51.981216Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:51.981216Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bEQUuX0UC+77jqPR1yzDctU0Bu8ChcVhPjb1SHyCKkBRhQGxDEiOnf3zPKOxHQcgQb0KRcGiGgw3e4r5qPpIDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:51.981860Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.08765","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:043bb3a00600570b57d89d7661f6488790594c0094cce94267ec6984315163ba","sha256:b2c28c773035d62594bdf37fc24da6fcedb0996a9c8071908c6c2370360ad029"],"state_sha256":"97217ca85dc7552393a846631ce740195adae64c94efa81843a74791eb12de5f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tv8tkwsthKnXcaZU2MAQmke4t0jCwhyND44Bb2LGPt8qQbwaXIZGfRv8rsgyfCuAEwwpH70Y2Z89PF2+lMygAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T21:52:55.965893Z","bundle_sha256":"f331acae55d2516a754f372b95715f1e80fd870f9644f4f0faf5b2513c679074"}}