{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:MMTGXLZVZEJYARLWIDIBNUBPCF","short_pith_number":"pith:MMTGXLZV","canonical_record":{"source":{"id":"2503.14317","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2025-03-18T14:50:24Z","cross_cats_sorted":[],"title_canon_sha256":"3553217549ba48cce8e7915d11ae92001a6472f01a8e231c7584af91efe0fac1","abstract_canon_sha256":"d9fb954b318a49f4574526b89ac4b3405b3f8801a57e49edb034f3c0f042c104"},"schema_version":"1.0"},"canonical_sha256":"63266baf35c91380457640d016d02f116d17008823995de3a6944b82d6b29f08","source":{"kind":"arxiv","id":"2503.14317","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.14317","created_at":"2026-07-05T10:34:00Z"},{"alias_kind":"arxiv_version","alias_value":"2503.14317v1","created_at":"2026-07-05T10:34:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.14317","created_at":"2026-07-05T10:34:00Z"},{"alias_kind":"pith_short_12","alias_value":"MMTGXLZVZEJY","created_at":"2026-07-05T10:34:00Z"},{"alias_kind":"pith_short_16","alias_value":"MMTGXLZVZEJYARLW","created_at":"2026-07-05T10:34:00Z"},{"alias_kind":"pith_short_8","alias_value":"MMTGXLZV","created_at":"2026-07-05T10:34:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:MMTGXLZVZEJYARLWIDIBNUBPCF","target":"record","payload":{"canonical_record":{"source":{"id":"2503.14317","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2025-03-18T14:50:24Z","cross_cats_sorted":[],"title_canon_sha256":"3553217549ba48cce8e7915d11ae92001a6472f01a8e231c7584af91efe0fac1","abstract_canon_sha256":"d9fb954b318a49f4574526b89ac4b3405b3f8801a57e49edb034f3c0f042c104"},"schema_version":"1.0"},"canonical_sha256":"63266baf35c91380457640d016d02f116d17008823995de3a6944b82d6b29f08","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:34:00.047801Z","signature_b64":"Pc1braUBTlQBslKMy9b5BCUy9NaOSQD1PIR49aTJjmqCttkp96lZjBPSHdxTnaQh8KGbYQUml5ZfCVoBEttDBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"63266baf35c91380457640d016d02f116d17008823995de3a6944b82d6b29f08","last_reissued_at":"2026-07-05T10:34:00.047385Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:34:00.047385Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2503.14317","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":"2026-07-05T10:34:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PgTcl0TDQ+lYH3r6C0PYi2dq0mRwrx+jKpKqP7ThxmiJ9tiSolCD1jrodNy3mUWruOUqW/az27Hfb5ewDHgzDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T05:57:35.136054Z"},"content_sha256":"98ca6d87d2cc83ea10dd8cc2ca98d7769d981c389cede75b3b188ec0ac31a282","schema_version":"1.0","event_id":"sha256:98ca6d87d2cc83ea10dd8cc2ca98d7769d981c389cede75b3b188ec0ac31a282"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:MMTGXLZVZEJYARLWIDIBNUBPCF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Near-Field Beam Prediction Using Far-Field Codebooks in Ultra-Massive MIMO Systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Abdulkadir Celik, Ahmed Hussain, Ahmed M. Eltawil, Asmaa Abdallah","submitted_at":"2025-03-18T14:50:24Z","abstract_excerpt":"Ultra-massive multiple-input multiple-output (UM-MIMO) technology is a key enabler for 6G networks, offering exceptional high data rates in millimeter-wave (mmWave) and Terahertz (THz) frequency bands. The deployment of large antenna arrays at high frequencies transitions wireless communication into the radiative near-field, where precise beam alignment becomes essential for accurate channel estimation. Unlike far-field systems, which rely on angular domain only, near-field necessitates beam search across both angle and distance dimensions, leading to substantially higher training overhead. To"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.14317","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/2503.14317/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":"2026-07-05T10:34:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IXm9ES+UbF2X7nK/U0+T5GfEp0E9emZmOgl4n+s1sN7Uhj1IOGr1mmN1DKirgCqgrGJo4CW1YCua36qelp0MDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T05:57:35.136635Z"},"content_sha256":"ceefb7a665d0ba3185f2aa2b2a2582a55de132c818249640c0d2d0a0dbf7ce53","schema_version":"1.0","event_id":"sha256:ceefb7a665d0ba3185f2aa2b2a2582a55de132c818249640c0d2d0a0dbf7ce53"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MMTGXLZVZEJYARLWIDIBNUBPCF/bundle.json","state_url":"https://pith.science/pith/MMTGXLZVZEJYARLWIDIBNUBPCF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MMTGXLZVZEJYARLWIDIBNUBPCF/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":"2026-08-12T05:57:35Z","links":{"resolver":"https://pith.science/pith/MMTGXLZVZEJYARLWIDIBNUBPCF","bundle":"https://pith.science/pith/MMTGXLZVZEJYARLWIDIBNUBPCF/bundle.json","state":"https://pith.science/pith/MMTGXLZVZEJYARLWIDIBNUBPCF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MMTGXLZVZEJYARLWIDIBNUBPCF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:MMTGXLZVZEJYARLWIDIBNUBPCF","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":"d9fb954b318a49f4574526b89ac4b3405b3f8801a57e49edb034f3c0f042c104","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2025-03-18T14:50:24Z","title_canon_sha256":"3553217549ba48cce8e7915d11ae92001a6472f01a8e231c7584af91efe0fac1"},"schema_version":"1.0","source":{"id":"2503.14317","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.14317","created_at":"2026-07-05T10:34:00Z"},{"alias_kind":"arxiv_version","alias_value":"2503.14317v1","created_at":"2026-07-05T10:34:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.14317","created_at":"2026-07-05T10:34:00Z"},{"alias_kind":"pith_short_12","alias_value":"MMTGXLZVZEJY","created_at":"2026-07-05T10:34:00Z"},{"alias_kind":"pith_short_16","alias_value":"MMTGXLZVZEJYARLW","created_at":"2026-07-05T10:34:00Z"},{"alias_kind":"pith_short_8","alias_value":"MMTGXLZV","created_at":"2026-07-05T10:34:00Z"}],"graph_snapshots":[{"event_id":"sha256:ceefb7a665d0ba3185f2aa2b2a2582a55de132c818249640c0d2d0a0dbf7ce53","target":"graph","created_at":"2026-07-05T10:34:00Z","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/2503.14317/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ultra-massive multiple-input multiple-output (UM-MIMO) technology is a key enabler for 6G networks, offering exceptional high data rates in millimeter-wave (mmWave) and Terahertz (THz) frequency bands. The deployment of large antenna arrays at high frequencies transitions wireless communication into the radiative near-field, where precise beam alignment becomes essential for accurate channel estimation. Unlike far-field systems, which rely on angular domain only, near-field necessitates beam search across both angle and distance dimensions, leading to substantially higher training overhead. To","authors_text":"Abdulkadir Celik, Ahmed Hussain, Ahmed M. Eltawil, Asmaa Abdallah","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2025-03-18T14:50:24Z","title":"Near-Field Beam Prediction Using Far-Field Codebooks in Ultra-Massive MIMO Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.14317","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":"sha256:98ca6d87d2cc83ea10dd8cc2ca98d7769d981c389cede75b3b188ec0ac31a282","target":"record","created_at":"2026-07-05T10:34:00Z","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":"d9fb954b318a49f4574526b89ac4b3405b3f8801a57e49edb034f3c0f042c104","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2025-03-18T14:50:24Z","title_canon_sha256":"3553217549ba48cce8e7915d11ae92001a6472f01a8e231c7584af91efe0fac1"},"schema_version":"1.0","source":{"id":"2503.14317","kind":"arxiv","version":1}},"canonical_sha256":"63266baf35c91380457640d016d02f116d17008823995de3a6944b82d6b29f08","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"63266baf35c91380457640d016d02f116d17008823995de3a6944b82d6b29f08","first_computed_at":"2026-07-05T10:34:00.047385Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:34:00.047385Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Pc1braUBTlQBslKMy9b5BCUy9NaOSQD1PIR49aTJjmqCttkp96lZjBPSHdxTnaQh8KGbYQUml5ZfCVoBEttDBA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:34:00.047801Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.14317","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:98ca6d87d2cc83ea10dd8cc2ca98d7769d981c389cede75b3b188ec0ac31a282","sha256:ceefb7a665d0ba3185f2aa2b2a2582a55de132c818249640c0d2d0a0dbf7ce53"],"state_sha256":"e90e0e5189477161fc067535c30fded5ab21c2d3e8cf4429d24574c64dc19ea9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9kBuRKvXPvgzjNVCmgzMhsT+67Qs8xynkqYcTluEoRoXnil0Fwrd5+tCCd0ny11u9eqCTBxkycv3JIJp1AHPDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T05:57:35.141661Z","bundle_sha256":"dce898c0d1e25789ef796882c56ef715db71a532038d3e2d80a4a1a67059441e"}}