{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:C7T4XNMXMZG4UMTUPVKRCXAEDY","short_pith_number":"pith:C7T4XNMX","canonical_record":{"source":{"id":"1806.02269","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-05-22T14:08:28Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"98351397fe52685a94cee4df4b8f06869824e80b0e24c3df42d5b8140d62dbbe","abstract_canon_sha256":"64abff7c4127f3b743ee140f1c44838d077f72f8ec00df8fb396e144a6644822"},"schema_version":"1.0"},"canonical_sha256":"17e7cbb597664dca32747d55115c041e3514916be5d136152febcc9e70670007","source":{"kind":"arxiv","id":"1806.02269","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.02269","created_at":"2026-05-18T00:10:10Z"},{"alias_kind":"arxiv_version","alias_value":"1806.02269v1","created_at":"2026-05-18T00:10:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.02269","created_at":"2026-05-18T00:10:10Z"},{"alias_kind":"pith_short_12","alias_value":"C7T4XNMXMZG4","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"C7T4XNMXMZG4UMTU","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"C7T4XNMX","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:C7T4XNMXMZG4UMTUPVKRCXAEDY","target":"record","payload":{"canonical_record":{"source":{"id":"1806.02269","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-05-22T14:08:28Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"98351397fe52685a94cee4df4b8f06869824e80b0e24c3df42d5b8140d62dbbe","abstract_canon_sha256":"64abff7c4127f3b743ee140f1c44838d077f72f8ec00df8fb396e144a6644822"},"schema_version":"1.0"},"canonical_sha256":"17e7cbb597664dca32747d55115c041e3514916be5d136152febcc9e70670007","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:10:10.081888Z","signature_b64":"1UYVlGJ5JDRSOzkG1cFdTfZArEF8l8oaJ6Uu22XF85mSrbssCX9aofY107Rc91d/15BHCWtBH2Os93G4AZ0KAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"17e7cbb597664dca32747d55115c041e3514916be5d136152febcc9e70670007","last_reissued_at":"2026-05-18T00:10:10.081384Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:10:10.081384Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.02269","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":"2026-05-18T00:10:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WpLm7M0qTw4CL2Q5jsOexo9AfYDU7UY7Ix778JRq5WDtOACSo765Hhr6ojPormePiJP7ItMfFZfyZJLS9SMGBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T09:18:41.470219Z"},"content_sha256":"1cbb3c4dd060edf2f8338a1dbc91b965d3f6af8fd2c3051c76c004df0159c4da","schema_version":"1.0","event_id":"sha256:1cbb3c4dd060edf2f8338a1dbc91b965d3f6af8fd2c3051c76c004df0159c4da"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:C7T4XNMXMZG4UMTUPVKRCXAEDY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New expression on the performance of a novel multi-hop relay-assisted hybrid FSO / RF communication system","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IT","math.IT"],"primary_cat":"eess.SP","authors_text":"Mohammad Ali Amirabadi","submitted_at":"2018-05-22T14:08:28Z","abstract_excerpt":"In this paper a novel multi-hop relay-assisted hybrid FSO / RF system is presented. It is assumed that direct RF connection between mobile users and source Base Station is impossible, therefore a relay connects RF users to the source Base Station via a FSO link. Source and destination Base Stations are connected via a multi-hop relay-assisted hybrid FSO / RF link. FSO link is investigated over moderate to saturate regimes of atmospheric turbulence. Also RF link is assumed to have Rayleigh fading. For the first time, new exact and asymptotic expressions are derived in closed-form for Bit Error "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.02269","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":"2026-05-18T00:10:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ufNu6a9IAYVlEYCl9jICipxgXEIA8OEUShgCLtegSQNYl7gs/YKVZRp20QmQPeXLrQtdHzRYXdDM5xRkbhl5Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T09:18:41.470577Z"},"content_sha256":"9228d41d11eb8018bf54eb2e4562ae42a7af9d6ca018acbbb24393a7e6a0bc95","schema_version":"1.0","event_id":"sha256:9228d41d11eb8018bf54eb2e4562ae42a7af9d6ca018acbbb24393a7e6a0bc95"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C7T4XNMXMZG4UMTUPVKRCXAEDY/bundle.json","state_url":"https://pith.science/pith/C7T4XNMXMZG4UMTUPVKRCXAEDY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C7T4XNMXMZG4UMTUPVKRCXAEDY/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":"2026-07-05T09:18:41Z","links":{"resolver":"https://pith.science/pith/C7T4XNMXMZG4UMTUPVKRCXAEDY","bundle":"https://pith.science/pith/C7T4XNMXMZG4UMTUPVKRCXAEDY/bundle.json","state":"https://pith.science/pith/C7T4XNMXMZG4UMTUPVKRCXAEDY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C7T4XNMXMZG4UMTUPVKRCXAEDY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:C7T4XNMXMZG4UMTUPVKRCXAEDY","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":"64abff7c4127f3b743ee140f1c44838d077f72f8ec00df8fb396e144a6644822","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-05-22T14:08:28Z","title_canon_sha256":"98351397fe52685a94cee4df4b8f06869824e80b0e24c3df42d5b8140d62dbbe"},"schema_version":"1.0","source":{"id":"1806.02269","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.02269","created_at":"2026-05-18T00:10:10Z"},{"alias_kind":"arxiv_version","alias_value":"1806.02269v1","created_at":"2026-05-18T00:10:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.02269","created_at":"2026-05-18T00:10:10Z"},{"alias_kind":"pith_short_12","alias_value":"C7T4XNMXMZG4","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"C7T4XNMXMZG4UMTU","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"C7T4XNMX","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:9228d41d11eb8018bf54eb2e4562ae42a7af9d6ca018acbbb24393a7e6a0bc95","target":"graph","created_at":"2026-05-18T00:10:10Z","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 novel multi-hop relay-assisted hybrid FSO / RF system is presented. It is assumed that direct RF connection between mobile users and source Base Station is impossible, therefore a relay connects RF users to the source Base Station via a FSO link. Source and destination Base Stations are connected via a multi-hop relay-assisted hybrid FSO / RF link. FSO link is investigated over moderate to saturate regimes of atmospheric turbulence. Also RF link is assumed to have Rayleigh fading. For the first time, new exact and asymptotic expressions are derived in closed-form for Bit Error ","authors_text":"Mohammad Ali Amirabadi","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-05-22T14:08:28Z","title":"New expression on the performance of a novel multi-hop relay-assisted hybrid FSO / RF communication system"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.02269","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":"sha256:1cbb3c4dd060edf2f8338a1dbc91b965d3f6af8fd2c3051c76c004df0159c4da","target":"record","created_at":"2026-05-18T00:10:10Z","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":"64abff7c4127f3b743ee140f1c44838d077f72f8ec00df8fb396e144a6644822","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-05-22T14:08:28Z","title_canon_sha256":"98351397fe52685a94cee4df4b8f06869824e80b0e24c3df42d5b8140d62dbbe"},"schema_version":"1.0","source":{"id":"1806.02269","kind":"arxiv","version":1}},"canonical_sha256":"17e7cbb597664dca32747d55115c041e3514916be5d136152febcc9e70670007","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"17e7cbb597664dca32747d55115c041e3514916be5d136152febcc9e70670007","first_computed_at":"2026-05-18T00:10:10.081384Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:10.081384Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1UYVlGJ5JDRSOzkG1cFdTfZArEF8l8oaJ6Uu22XF85mSrbssCX9aofY107Rc91d/15BHCWtBH2Os93G4AZ0KAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:10.081888Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.02269","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1cbb3c4dd060edf2f8338a1dbc91b965d3f6af8fd2c3051c76c004df0159c4da","sha256:9228d41d11eb8018bf54eb2e4562ae42a7af9d6ca018acbbb24393a7e6a0bc95"],"state_sha256":"f76281a5891f0b5c7bb045a65e3ef807fcadc2e88681de29c97ae03971b6bc07"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xJHjB7wR3+MCALKSbCY8pP4Xezn6LTseGJHE4CifiGDy7JJu/p04DTgFXlLX9lZebl6P7phKKptlOoPqW2U6Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T09:18:41.472530Z","bundle_sha256":"836f2a1c4651f6bd0fdad891c5fd0ea9fcbf58e827ceee4101dd3bf2f20ea36b"}}