{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:GZXEDFI3UXLLNPCF7ZBABJG4YH","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":"a40a4a7d872173df234026a556681d0ff1aa4d48baf421cdb6ccd523417e6480","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-01-16T01:50:35Z","title_canon_sha256":"9c04e75dbc76f84fc07c916ee86145212a1779c9764da3b8704be175110483f8"},"schema_version":"1.0","source":{"id":"1902.03894","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.03894","created_at":"2026-05-17T23:54:17Z"},{"alias_kind":"arxiv_version","alias_value":"1902.03894v1","created_at":"2026-05-17T23:54:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.03894","created_at":"2026-05-17T23:54:17Z"},{"alias_kind":"pith_short_12","alias_value":"GZXEDFI3UXLL","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"GZXEDFI3UXLLNPCF","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"GZXEDFI3","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:7fa062d524127671b3ca67aeb1e74281af91a4374b01bd9a8acb74785499192a","target":"graph","created_at":"2026-05-17T23:54:17Z","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 work, we provide a detailed analysis of a dual-hop fixed gain (FG) amplify-and-forward relaying system, consisting of a hybrid radio frequency (RF) and free-space optical (FSO) channels. We introduce an impairment model which is the soft envelope limiter (SEL). Additionally, we propose the partial relay selection (PRS) protocol with outdated channel state information (CSI) based on the knowledge of the RF channels in order to select one relay for the communication. Moreover, the RF channels of the first hop experience Rayleigh fading while we propose a unified fading model for the FSO ","authors_text":"Bassem Khalfi, Bechir Hamdaoui, Elyes Balti, Mohsen Guizani","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-01-16T01:50:35Z","title":"Mixed RF/FSO Relaying Systems with Hardware Impairments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.03894","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:c2576b46fdea2d42db3dbd924ba17207dd34b65bb170e0a83181318bf11776b9","target":"record","created_at":"2026-05-17T23:54:17Z","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":"a40a4a7d872173df234026a556681d0ff1aa4d48baf421cdb6ccd523417e6480","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-01-16T01:50:35Z","title_canon_sha256":"9c04e75dbc76f84fc07c916ee86145212a1779c9764da3b8704be175110483f8"},"schema_version":"1.0","source":{"id":"1902.03894","kind":"arxiv","version":1}},"canonical_sha256":"366e41951ba5d6b6bc45fe4200a4dcc1c0c796f79584b57f150fa57ec11d4640","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"366e41951ba5d6b6bc45fe4200a4dcc1c0c796f79584b57f150fa57ec11d4640","first_computed_at":"2026-05-17T23:54:17.627116Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:17.627116Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6GzXplpJSyIP9aHcpYsCC5trmlMZmbrlyNs53NFzx3EMQgk2nDQwghK4PK+hSfW7qlPWwPhm0ZeOl2+1T/nfBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:17.627596Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.03894","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c2576b46fdea2d42db3dbd924ba17207dd34b65bb170e0a83181318bf11776b9","sha256:7fa062d524127671b3ca67aeb1e74281af91a4374b01bd9a8acb74785499192a"],"state_sha256":"daee4a718ed436d666f626c49ffeedff45c3bbc63096364de50e137b3bae121e"}