{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:CMQHJVJN65BRWAX3MBNRLDSSYK","short_pith_number":"pith:CMQHJVJN","canonical_record":{"source":{"id":"2201.10757","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2022-01-26T05:33:44Z","cross_cats_sorted":[],"title_canon_sha256":"821e61d89f8ca46831cf17930a3c60c060ee35973563eb5ef4b0d040fa7774ee","abstract_canon_sha256":"dc2f339a826224ce0397cc885b4cb7ad2d10f6adb66b78d550613875fa3d6a4a"},"schema_version":"1.0"},"canonical_sha256":"132074d52df7431b02fb605b158e52c2b104407a7f9b7e3e9476a991db3e208e","source":{"kind":"arxiv","id":"2201.10757","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.10757","created_at":"2026-07-05T03:54:04Z"},{"alias_kind":"arxiv_version","alias_value":"2201.10757v2","created_at":"2026-07-05T03:54:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.10757","created_at":"2026-07-05T03:54:04Z"},{"alias_kind":"pith_short_12","alias_value":"CMQHJVJN65BR","created_at":"2026-07-05T03:54:04Z"},{"alias_kind":"pith_short_16","alias_value":"CMQHJVJN65BRWAX3","created_at":"2026-07-05T03:54:04Z"},{"alias_kind":"pith_short_8","alias_value":"CMQHJVJN","created_at":"2026-07-05T03:54:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:CMQHJVJN65BRWAX3MBNRLDSSYK","target":"record","payload":{"canonical_record":{"source":{"id":"2201.10757","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2022-01-26T05:33:44Z","cross_cats_sorted":[],"title_canon_sha256":"821e61d89f8ca46831cf17930a3c60c060ee35973563eb5ef4b0d040fa7774ee","abstract_canon_sha256":"dc2f339a826224ce0397cc885b4cb7ad2d10f6adb66b78d550613875fa3d6a4a"},"schema_version":"1.0"},"canonical_sha256":"132074d52df7431b02fb605b158e52c2b104407a7f9b7e3e9476a991db3e208e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:54:04.687629Z","signature_b64":"9S1Lt5Jj2i/LurPzNX0zRUQcMyEFpGyvBpmkd8mM9BPwNSgL9O9Dun2lRf/jueCw3hVFCZ1hDE6QzNNzFX/BDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"132074d52df7431b02fb605b158e52c2b104407a7f9b7e3e9476a991db3e208e","last_reissued_at":"2026-07-05T03:54:04.687139Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:54:04.687139Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2201.10757","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:54:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"42QVivR9+gGLIjpton0JF9sJsI/m+z9AAq+Nfks/XkiG7vceXipLotS+6+XFHXU7XLCJYbNVwB9WBE9WLlTBBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T02:30:59.847135Z"},"content_sha256":"813693faef14be1138324440d8692d15e992235efef4cd9305e86fdf09d736d0","schema_version":"1.0","event_id":"sha256:813693faef14be1138324440d8692d15e992235efef4cd9305e86fdf09d736d0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:CMQHJVJN65BRWAX3MBNRLDSSYK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hybrid 3D Beamforming Relying on Sensor-Based Training and Channel Estimation for Reconfigurable Intelligent Surface Aided TeraHertz MIMO systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Feng Lin, Lajos Hanzo, Life Fellow, Xufang Wang, Zihuai Lin","submitted_at":"2022-01-26T05:33:44Z","abstract_excerpt":"Terahertz (THz) systems have the benefit of high bandwidth and hence are capable of supporting ultra-high data rates, albeit at the cost of high pathloss. Hence they tend to harness high-gain beamforming. Therefore a novel hybrid 3D beamformer relying on sophisticated sensor-based beam training and channel estimation is proposed for Reconfigurable Intelligent Surface (RIS) aided THz MIMO systems. A so-called array-of-subarray based THz BS architecture is adopted and the corresponding sub-RIS structure is proposed. The BS, RIS and receiver antenna arrays of the users are all uniform planar arra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.10757","kind":"arxiv","version":2},"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/2201.10757/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":"2026-07-05T03:54:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ypKQeD81YFd/ZrxNh29XpmdGHH3hLBWGy72nhEY7OPFWjRFeEq/TqQ6fzYwUZ2V/n5T4AySoei30mVdBo18SCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T02:30:59.847738Z"},"content_sha256":"d562c0202dd15112f8197b44fd025d5c3f33d336ba20f3b2c0a90d1b357ad9d1","schema_version":"1.0","event_id":"sha256:d562c0202dd15112f8197b44fd025d5c3f33d336ba20f3b2c0a90d1b357ad9d1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CMQHJVJN65BRWAX3MBNRLDSSYK/bundle.json","state_url":"https://pith.science/pith/CMQHJVJN65BRWAX3MBNRLDSSYK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CMQHJVJN65BRWAX3MBNRLDSSYK/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":"2026-08-05T02:30:59Z","links":{"resolver":"https://pith.science/pith/CMQHJVJN65BRWAX3MBNRLDSSYK","bundle":"https://pith.science/pith/CMQHJVJN65BRWAX3MBNRLDSSYK/bundle.json","state":"https://pith.science/pith/CMQHJVJN65BRWAX3MBNRLDSSYK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CMQHJVJN65BRWAX3MBNRLDSSYK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:CMQHJVJN65BRWAX3MBNRLDSSYK","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":"dc2f339a826224ce0397cc885b4cb7ad2d10f6adb66b78d550613875fa3d6a4a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2022-01-26T05:33:44Z","title_canon_sha256":"821e61d89f8ca46831cf17930a3c60c060ee35973563eb5ef4b0d040fa7774ee"},"schema_version":"1.0","source":{"id":"2201.10757","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.10757","created_at":"2026-07-05T03:54:04Z"},{"alias_kind":"arxiv_version","alias_value":"2201.10757v2","created_at":"2026-07-05T03:54:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.10757","created_at":"2026-07-05T03:54:04Z"},{"alias_kind":"pith_short_12","alias_value":"CMQHJVJN65BR","created_at":"2026-07-05T03:54:04Z"},{"alias_kind":"pith_short_16","alias_value":"CMQHJVJN65BRWAX3","created_at":"2026-07-05T03:54:04Z"},{"alias_kind":"pith_short_8","alias_value":"CMQHJVJN","created_at":"2026-07-05T03:54:04Z"}],"graph_snapshots":[{"event_id":"sha256:d562c0202dd15112f8197b44fd025d5c3f33d336ba20f3b2c0a90d1b357ad9d1","target":"graph","created_at":"2026-07-05T03:54:04Z","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/2201.10757/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Terahertz (THz) systems have the benefit of high bandwidth and hence are capable of supporting ultra-high data rates, albeit at the cost of high pathloss. Hence they tend to harness high-gain beamforming. Therefore a novel hybrid 3D beamformer relying on sophisticated sensor-based beam training and channel estimation is proposed for Reconfigurable Intelligent Surface (RIS) aided THz MIMO systems. A so-called array-of-subarray based THz BS architecture is adopted and the corresponding sub-RIS structure is proposed. The BS, RIS and receiver antenna arrays of the users are all uniform planar arra","authors_text":"Feng Lin, Lajos Hanzo, Life Fellow, Xufang Wang, Zihuai Lin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2022-01-26T05:33:44Z","title":"Hybrid 3D Beamforming Relying on Sensor-Based Training and Channel Estimation for Reconfigurable Intelligent Surface Aided TeraHertz MIMO systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.10757","kind":"arxiv","version":2},"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":"sha256:813693faef14be1138324440d8692d15e992235efef4cd9305e86fdf09d736d0","target":"record","created_at":"2026-07-05T03:54:04Z","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":"dc2f339a826224ce0397cc885b4cb7ad2d10f6adb66b78d550613875fa3d6a4a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2022-01-26T05:33:44Z","title_canon_sha256":"821e61d89f8ca46831cf17930a3c60c060ee35973563eb5ef4b0d040fa7774ee"},"schema_version":"1.0","source":{"id":"2201.10757","kind":"arxiv","version":2}},"canonical_sha256":"132074d52df7431b02fb605b158e52c2b104407a7f9b7e3e9476a991db3e208e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"132074d52df7431b02fb605b158e52c2b104407a7f9b7e3e9476a991db3e208e","first_computed_at":"2026-07-05T03:54:04.687139Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:54:04.687139Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9S1Lt5Jj2i/LurPzNX0zRUQcMyEFpGyvBpmkd8mM9BPwNSgL9O9Dun2lRf/jueCw3hVFCZ1hDE6QzNNzFX/BDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:54:04.687629Z","signed_message":"canonical_sha256_bytes"},"source_id":"2201.10757","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:813693faef14be1138324440d8692d15e992235efef4cd9305e86fdf09d736d0","sha256:d562c0202dd15112f8197b44fd025d5c3f33d336ba20f3b2c0a90d1b357ad9d1"],"state_sha256":"9c29737a604338858e4e519e524843e56535377c120aad5d0c081ea591929d31"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qPoWs/NxXxfYAPJOt/0DwoqlppV2M5PcTJ849D2uhUvGgqUCCOZrRUPZhWhBBJ/Gw4vgv+NS1W47tQgSjGrKBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T02:30:59.852282Z","bundle_sha256":"ef8699772525a2600d65691743b77229c9eee7c97562e5c46b3ce9599bd9c530"}}