{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:OW4XO4BR25IXCKOFVTLTW72XCI","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":"a8c0270741cc4832b2e960626967ec14364afe5cffeea31b43be98a5b5854893","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-06-12T14:38:41Z","title_canon_sha256":"fe8aa51753b5eced1ad00f4b216c6c2843cfe5c52b0fe80e311c1c5fa0c4a899"},"schema_version":"1.0","source":{"id":"1906.05174","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.05174","created_at":"2026-05-17T23:43:29Z"},{"alias_kind":"arxiv_version","alias_value":"1906.05174v1","created_at":"2026-05-17T23:43:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.05174","created_at":"2026-05-17T23:43:29Z"},{"alias_kind":"pith_short_12","alias_value":"OW4XO4BR25IX","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"OW4XO4BR25IXCKOF","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"OW4XO4BR","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:6c8bc69304fe29f7f4157faeb19afa5c05bd187abeb7dc53885fe99df4f2383e","target":"graph","created_at":"2026-05-17T23:43:29Z","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":"Unmanned aerial vehicles provide new opportunities for performance improvements in future wireless communications systems. For example, they can act as relays that extend the range of a communication link and improve the capacity. Unlike conventional relays that are deployed at fixed locations, UAVs can change their positions to optimize the capacity or range on demand. In this paper, we consider using a swarm of UAVs as amplify-and-forward MIMO relays to provide connectivity between an obstructed multi-antenna equipped source and destination. We start by optimizing UAV placement for the singl","authors_text":"Danijela Cabric, Enes Krijestorac, Han Yan, Samer Hanna","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-06-12T14:38:41Z","title":"UAV Swarms as Amplify-and-Forward MIMO Relays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.05174","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":"sha256:9da73020dec4e213f20d3771d0fb4e51ea2adefdbd7177a635e6b329a61e2693","target":"record","created_at":"2026-05-17T23:43:29Z","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":"a8c0270741cc4832b2e960626967ec14364afe5cffeea31b43be98a5b5854893","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-06-12T14:38:41Z","title_canon_sha256":"fe8aa51753b5eced1ad00f4b216c6c2843cfe5c52b0fe80e311c1c5fa0c4a899"},"schema_version":"1.0","source":{"id":"1906.05174","kind":"arxiv","version":1}},"canonical_sha256":"75b9777031d7517129c5acd73b7f571204f4b89828aaf24a0f39847468a3963f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"75b9777031d7517129c5acd73b7f571204f4b89828aaf24a0f39847468a3963f","first_computed_at":"2026-05-17T23:43:29.286554Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:29.286554Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"s4cF8JfzLnFTizg2xbYN+YPUDqhBEIa1jgFDKDqbmemMKPMylp82CRUz3164oRHJ8c2ysJBONaBNRtHTzloyDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:29.287027Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.05174","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9da73020dec4e213f20d3771d0fb4e51ea2adefdbd7177a635e6b329a61e2693","sha256:6c8bc69304fe29f7f4157faeb19afa5c05bd187abeb7dc53885fe99df4f2383e"],"state_sha256":"841cbf027598f64bb4dd9cb824ca9d15ca30b1449fbf61b9f8a1c15914747d05"}