{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:PW2PPR5ELEDIOP6RGU2LCCO6ZF","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":"98b040fd7837cab969d291864aeb43f51bf4bfaaf174b0f28896f248379e7dd4","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-02-02T05:37:55Z","title_canon_sha256":"38ae853e5921db509b218c0abfe47948ff6a67e8af4fe9c32ffc7157fd8a4292"},"schema_version":"1.0","source":{"id":"1502.00365","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.00365","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"arxiv_version","alias_value":"1502.00365v1","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.00365","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"pith_short_12","alias_value":"PW2PPR5ELEDI","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"PW2PPR5ELEDIOP6R","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"PW2PPR5E","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:668547b937e2f5c1d82a0769058584c7f3869efa969a142cee781d7031e36186","target":"graph","created_at":"2026-05-18T02:28:06Z","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":"A major performance degrading factor in free space optical communication (FSO) systems is atmospheric turbulence. Spatial diversity techniques provide a promising approach to mitigate turbulence-induced fading. In this paper, we study the error rate performance of FSO links with spatial diversity over atmospheric turbulence channels described by the Double Generalized Gamma distribution which is a new generic statistical model covering all turbulence conditions. We assume intensity modulation/direct detection with on-off keying and present the BER performance of single-input multiple-output (S","authors_text":"Mohmmadreza Aminikashani, Mohsen Kavehrad, Murat Uysal","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-02-02T05:37:55Z","title":"On the Performance of MIMO FSO Communications over Double Generalized Gamma Fading Channels"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.00365","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:f1c6d393390aa915a90e28e5493bee8d4156b822e972b96d4d9f43e4ca61527e","target":"record","created_at":"2026-05-18T02:28:06Z","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":"98b040fd7837cab969d291864aeb43f51bf4bfaaf174b0f28896f248379e7dd4","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-02-02T05:37:55Z","title_canon_sha256":"38ae853e5921db509b218c0abfe47948ff6a67e8af4fe9c32ffc7157fd8a4292"},"schema_version":"1.0","source":{"id":"1502.00365","kind":"arxiv","version":1}},"canonical_sha256":"7db4f7c7a45906873fd13534b109dec94db076718a81f6525575d53cb717eb4e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7db4f7c7a45906873fd13534b109dec94db076718a81f6525575d53cb717eb4e","first_computed_at":"2026-05-18T02:28:06.155827Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:28:06.155827Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JM3y+swG9OTgE1vTqKKNjdQ+xjWzaxeHGeP0pznejAE9Q+67e/227WqXdkmzfnrzHZ4Uf5zi70pGv8twGoonAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:28:06.156462Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.00365","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f1c6d393390aa915a90e28e5493bee8d4156b822e972b96d4d9f43e4ca61527e","sha256:668547b937e2f5c1d82a0769058584c7f3869efa969a142cee781d7031e36186"],"state_sha256":"60c27b094845b20efe9f64ec089de3a78c549eb59de84fe2f341df7ead1f7614"}