{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:3SCUIWMRNOYXUY3OER2XJV4PK5","short_pith_number":"pith:3SCUIWMR","canonical_record":{"source":{"id":"2503.01668","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-03-03T15:42:02Z","cross_cats_sorted":[],"title_canon_sha256":"8fd7fdd53079d48667fd102a984e64be4b6324cd0d1271491af7c1498e1e5938","abstract_canon_sha256":"e5377b73519994c125314e0e230aefdc38f62bdf2cb0c2e8e09ce706d099124a"},"schema_version":"1.0"},"canonical_sha256":"dc854459916bb17a636e247574d78f5762ab261d94bbc9dd94181ecb7751eb6c","source":{"kind":"arxiv","id":"2503.01668","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.01668","created_at":"2026-07-05T10:23:12Z"},{"alias_kind":"arxiv_version","alias_value":"2503.01668v1","created_at":"2026-07-05T10:23:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.01668","created_at":"2026-07-05T10:23:12Z"},{"alias_kind":"pith_short_12","alias_value":"3SCUIWMRNOYX","created_at":"2026-07-05T10:23:12Z"},{"alias_kind":"pith_short_16","alias_value":"3SCUIWMRNOYXUY3O","created_at":"2026-07-05T10:23:12Z"},{"alias_kind":"pith_short_8","alias_value":"3SCUIWMR","created_at":"2026-07-05T10:23:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:3SCUIWMRNOYXUY3OER2XJV4PK5","target":"record","payload":{"canonical_record":{"source":{"id":"2503.01668","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-03-03T15:42:02Z","cross_cats_sorted":[],"title_canon_sha256":"8fd7fdd53079d48667fd102a984e64be4b6324cd0d1271491af7c1498e1e5938","abstract_canon_sha256":"e5377b73519994c125314e0e230aefdc38f62bdf2cb0c2e8e09ce706d099124a"},"schema_version":"1.0"},"canonical_sha256":"dc854459916bb17a636e247574d78f5762ab261d94bbc9dd94181ecb7751eb6c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:23:12.066520Z","signature_b64":"zjVomqjteJpcbpSjPy7O4JHzTReY4C2/ANgsW1IGKU/w2dzheWGa4QnXMOr1naFeONLbTPPHqldH4xrxJfnYDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dc854459916bb17a636e247574d78f5762ab261d94bbc9dd94181ecb7751eb6c","last_reissued_at":"2026-07-05T10:23:12.065994Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:23:12.065994Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2503.01668","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":"2026-07-05T10:23:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"07PNtWLnj4bJeL/fkwYOG3dK9gpDQGFfXy0o8Rzi6bfyimVHhLzsFKhr2EQqV7LXwy5TMmMm6n9nQC49K33+DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T06:47:14.235926Z"},"content_sha256":"1b263d8aa4d76a347ebcfc40a63750159bf83d8b4386ac4cb67016e9ececda03","schema_version":"1.0","event_id":"sha256:1b263d8aa4d76a347ebcfc40a63750159bf83d8b4386ac4cb67016e9ececda03"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:3SCUIWMRNOYXUY3OER2XJV4PK5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Uplink Transmission Design for Fluid Antenna-Enabled Multiuser MIMO Systems with Imperfect CSI","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Cunhua Pan, Hong Ren, Linyue Hu, Luchu Li","submitted_at":"2025-03-03T15:42:02Z","abstract_excerpt":"This paper investigates a two-timescale uplink transmission framework for a fluid antenna-enabled multiuser multi-input multi-output system (MIMO-FAS). Antenna positions are optimized based on statistical channel state information (CSI), while beamforming vectors at the base station (BS) adapt to instantaneous CSI. Under a Rician fading channel with imperfect CSI, we establish a linear minimum mean square error (LMMSE)-based channel estimation approach and derive a closed-form expression for the achievable uplink rate using a low-complexity maximal-ratio-combining (MRC) detector. The optimizat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.01668","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2503.01668/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T10:23:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i50dWf3vEtS+43sP7LrHXm5Hx32PjoXH2qV0BcP2r8n2rhNt8hG8FNeZf2ZgQHYh+b15JXK40CbOGGP2nWUBCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T06:47:14.236672Z"},"content_sha256":"22f2129ae7f4a3e760bb54eddec3f3a2047ef112039d76f1a58bff91d02d1359","schema_version":"1.0","event_id":"sha256:22f2129ae7f4a3e760bb54eddec3f3a2047ef112039d76f1a58bff91d02d1359"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3SCUIWMRNOYXUY3OER2XJV4PK5/bundle.json","state_url":"https://pith.science/pith/3SCUIWMRNOYXUY3OER2XJV4PK5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3SCUIWMRNOYXUY3OER2XJV4PK5/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":"2026-08-10T06:47:14Z","links":{"resolver":"https://pith.science/pith/3SCUIWMRNOYXUY3OER2XJV4PK5","bundle":"https://pith.science/pith/3SCUIWMRNOYXUY3OER2XJV4PK5/bundle.json","state":"https://pith.science/pith/3SCUIWMRNOYXUY3OER2XJV4PK5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3SCUIWMRNOYXUY3OER2XJV4PK5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:3SCUIWMRNOYXUY3OER2XJV4PK5","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":"e5377b73519994c125314e0e230aefdc38f62bdf2cb0c2e8e09ce706d099124a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-03-03T15:42:02Z","title_canon_sha256":"8fd7fdd53079d48667fd102a984e64be4b6324cd0d1271491af7c1498e1e5938"},"schema_version":"1.0","source":{"id":"2503.01668","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.01668","created_at":"2026-07-05T10:23:12Z"},{"alias_kind":"arxiv_version","alias_value":"2503.01668v1","created_at":"2026-07-05T10:23:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.01668","created_at":"2026-07-05T10:23:12Z"},{"alias_kind":"pith_short_12","alias_value":"3SCUIWMRNOYX","created_at":"2026-07-05T10:23:12Z"},{"alias_kind":"pith_short_16","alias_value":"3SCUIWMRNOYXUY3O","created_at":"2026-07-05T10:23:12Z"},{"alias_kind":"pith_short_8","alias_value":"3SCUIWMR","created_at":"2026-07-05T10:23:12Z"}],"graph_snapshots":[{"event_id":"sha256:22f2129ae7f4a3e760bb54eddec3f3a2047ef112039d76f1a58bff91d02d1359","target":"graph","created_at":"2026-07-05T10:23:12Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2503.01668/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper investigates a two-timescale uplink transmission framework for a fluid antenna-enabled multiuser multi-input multi-output system (MIMO-FAS). Antenna positions are optimized based on statistical channel state information (CSI), while beamforming vectors at the base station (BS) adapt to instantaneous CSI. Under a Rician fading channel with imperfect CSI, we establish a linear minimum mean square error (LMMSE)-based channel estimation approach and derive a closed-form expression for the achievable uplink rate using a low-complexity maximal-ratio-combining (MRC) detector. The optimizat","authors_text":"Cunhua Pan, Hong Ren, Linyue Hu, Luchu Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-03-03T15:42:02Z","title":"Uplink Transmission Design for Fluid Antenna-Enabled Multiuser MIMO Systems with Imperfect CSI"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.01668","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":"sha256:1b263d8aa4d76a347ebcfc40a63750159bf83d8b4386ac4cb67016e9ececda03","target":"record","created_at":"2026-07-05T10:23:12Z","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":"e5377b73519994c125314e0e230aefdc38f62bdf2cb0c2e8e09ce706d099124a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-03-03T15:42:02Z","title_canon_sha256":"8fd7fdd53079d48667fd102a984e64be4b6324cd0d1271491af7c1498e1e5938"},"schema_version":"1.0","source":{"id":"2503.01668","kind":"arxiv","version":1}},"canonical_sha256":"dc854459916bb17a636e247574d78f5762ab261d94bbc9dd94181ecb7751eb6c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dc854459916bb17a636e247574d78f5762ab261d94bbc9dd94181ecb7751eb6c","first_computed_at":"2026-07-05T10:23:12.065994Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:23:12.065994Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zjVomqjteJpcbpSjPy7O4JHzTReY4C2/ANgsW1IGKU/w2dzheWGa4QnXMOr1naFeONLbTPPHqldH4xrxJfnYDg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:23:12.066520Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.01668","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b263d8aa4d76a347ebcfc40a63750159bf83d8b4386ac4cb67016e9ececda03","sha256:22f2129ae7f4a3e760bb54eddec3f3a2047ef112039d76f1a58bff91d02d1359"],"state_sha256":"fd471cd49d9b692b506c5d9830bedbccd65984c7583eb6cee64c7605220a17ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UCx9+mj1Xw3SFsYSRvkdHvqdRzbDn4sHnjGknZ1HuW2YfbBYKel4QL7kaL+l4XZafe/DQom9fk6TITzx4v24Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T06:47:14.242135Z","bundle_sha256":"83e58a72562ed77c33dbc3e0d4d28d8f06c2c0ae8db3f9b5b20f9d0d7977cac6"}}