{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:JOQ5R7PPYH2KRNQED3DDEW2EJQ","short_pith_number":"pith:JOQ5R7PP","canonical_record":{"source":{"id":"2111.14805","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2021-11-29T18:54:15Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"d793e40a539e08526ee6ba1f3930dc55fea8c8d1a2151333447a2d9ee56f0df7","abstract_canon_sha256":"448eb68dadc45cd1e3169c629b052747c5e5b099d1edaa2b38068db608f2e266"},"schema_version":"1.0"},"canonical_sha256":"4ba1d8fdefc1f4a8b6041ec6325b444c08be86e8d3af66badabb9cb51cd0b339","source":{"kind":"arxiv","id":"2111.14805","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.14805","created_at":"2026-07-05T03:35:55Z"},{"alias_kind":"arxiv_version","alias_value":"2111.14805v1","created_at":"2026-07-05T03:35:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.14805","created_at":"2026-07-05T03:35:55Z"},{"alias_kind":"pith_short_12","alias_value":"JOQ5R7PPYH2K","created_at":"2026-07-05T03:35:55Z"},{"alias_kind":"pith_short_16","alias_value":"JOQ5R7PPYH2KRNQE","created_at":"2026-07-05T03:35:55Z"},{"alias_kind":"pith_short_8","alias_value":"JOQ5R7PP","created_at":"2026-07-05T03:35:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:JOQ5R7PPYH2KRNQED3DDEW2EJQ","target":"record","payload":{"canonical_record":{"source":{"id":"2111.14805","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2021-11-29T18:54:15Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"d793e40a539e08526ee6ba1f3930dc55fea8c8d1a2151333447a2d9ee56f0df7","abstract_canon_sha256":"448eb68dadc45cd1e3169c629b052747c5e5b099d1edaa2b38068db608f2e266"},"schema_version":"1.0"},"canonical_sha256":"4ba1d8fdefc1f4a8b6041ec6325b444c08be86e8d3af66badabb9cb51cd0b339","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:35:55.951666Z","signature_b64":"z/EiK6DahNT3M6z/oH8njR978sBwbMKz80CH0qhgRr5pt3MFZTCrJhAJewDegCl7VtkwZXkTT/s8HfURyKnoCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4ba1d8fdefc1f4a8b6041ec6325b444c08be86e8d3af66badabb9cb51cd0b339","last_reissued_at":"2026-07-05T03:35:55.951200Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:35:55.951200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2111.14805","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":"2026-07-05T03:35:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VyNdUUtd7vh3Gun9qhzlba96m2+kCEkUHgrSLXVHPiwUmU6kOseiyrTn8HYymZ/w+mv87MK7wNLNeaXNwdmICg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T04:59:30.933022Z"},"content_sha256":"4a419f0bcfde66afacf15ed708d6851140667472e5ede5058896dd17d1d2f5ce","schema_version":"1.0","event_id":"sha256:4a419f0bcfde66afacf15ed708d6851140667472e5ede5058896dd17d1d2f5ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:JOQ5R7PPYH2KRNQED3DDEW2EJQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Radar Aided Proactive Blockage Prediction in Real-World Millimeter Wave Systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.IT","math.IT"],"primary_cat":"eess.SP","authors_text":"Ahmed Alkhateeb, Umut Demirhan","submitted_at":"2021-11-29T18:54:15Z","abstract_excerpt":"Millimeter wave (mmWave) and sub-terahertz communication systems rely mainly on line-of-sight (LOS) links between the transmitters and receivers. The sensitivity of these high-frequency LOS links to blockages, however, challenges the reliability and latency requirements of these communication networks. In this paper, we propose to utilize radar sensors to provide sensing information about the surrounding environment and moving objects, and leverage this information to proactively predict future link blockages before they happen. This is motivated by the low cost of the radar sensors, their abi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.14805","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/2111.14805/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":"2026-07-05T03:35:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0keTUsJc6qC17W2fwxPY9/8a3XoeMSUJMIK76vCOfL2vkBlNYH8mYXM+zrimnC6fCBrjKGCmd5kqhdgSVhk2Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T04:59:30.933932Z"},"content_sha256":"5f12cdbe09b5939f0dab759bc71177ce191e522d73d1bb87b2a82b67e57e7919","schema_version":"1.0","event_id":"sha256:5f12cdbe09b5939f0dab759bc71177ce191e522d73d1bb87b2a82b67e57e7919"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JOQ5R7PPYH2KRNQED3DDEW2EJQ/bundle.json","state_url":"https://pith.science/pith/JOQ5R7PPYH2KRNQED3DDEW2EJQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JOQ5R7PPYH2KRNQED3DDEW2EJQ/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":"2026-08-17T04:59:30Z","links":{"resolver":"https://pith.science/pith/JOQ5R7PPYH2KRNQED3DDEW2EJQ","bundle":"https://pith.science/pith/JOQ5R7PPYH2KRNQED3DDEW2EJQ/bundle.json","state":"https://pith.science/pith/JOQ5R7PPYH2KRNQED3DDEW2EJQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JOQ5R7PPYH2KRNQED3DDEW2EJQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:JOQ5R7PPYH2KRNQED3DDEW2EJQ","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":"448eb68dadc45cd1e3169c629b052747c5e5b099d1edaa2b38068db608f2e266","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2021-11-29T18:54:15Z","title_canon_sha256":"d793e40a539e08526ee6ba1f3930dc55fea8c8d1a2151333447a2d9ee56f0df7"},"schema_version":"1.0","source":{"id":"2111.14805","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.14805","created_at":"2026-07-05T03:35:55Z"},{"alias_kind":"arxiv_version","alias_value":"2111.14805v1","created_at":"2026-07-05T03:35:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.14805","created_at":"2026-07-05T03:35:55Z"},{"alias_kind":"pith_short_12","alias_value":"JOQ5R7PPYH2K","created_at":"2026-07-05T03:35:55Z"},{"alias_kind":"pith_short_16","alias_value":"JOQ5R7PPYH2KRNQE","created_at":"2026-07-05T03:35:55Z"},{"alias_kind":"pith_short_8","alias_value":"JOQ5R7PP","created_at":"2026-07-05T03:35:55Z"}],"graph_snapshots":[{"event_id":"sha256:5f12cdbe09b5939f0dab759bc71177ce191e522d73d1bb87b2a82b67e57e7919","target":"graph","created_at":"2026-07-05T03:35:55Z","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/2111.14805/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Millimeter wave (mmWave) and sub-terahertz communication systems rely mainly on line-of-sight (LOS) links between the transmitters and receivers. The sensitivity of these high-frequency LOS links to blockages, however, challenges the reliability and latency requirements of these communication networks. In this paper, we propose to utilize radar sensors to provide sensing information about the surrounding environment and moving objects, and leverage this information to proactively predict future link blockages before they happen. This is motivated by the low cost of the radar sensors, their abi","authors_text":"Ahmed Alkhateeb, Umut Demirhan","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2021-11-29T18:54:15Z","title":"Radar Aided Proactive Blockage Prediction in Real-World Millimeter Wave Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.14805","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":"sha256:4a419f0bcfde66afacf15ed708d6851140667472e5ede5058896dd17d1d2f5ce","target":"record","created_at":"2026-07-05T03:35:55Z","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":"448eb68dadc45cd1e3169c629b052747c5e5b099d1edaa2b38068db608f2e266","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2021-11-29T18:54:15Z","title_canon_sha256":"d793e40a539e08526ee6ba1f3930dc55fea8c8d1a2151333447a2d9ee56f0df7"},"schema_version":"1.0","source":{"id":"2111.14805","kind":"arxiv","version":1}},"canonical_sha256":"4ba1d8fdefc1f4a8b6041ec6325b444c08be86e8d3af66badabb9cb51cd0b339","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4ba1d8fdefc1f4a8b6041ec6325b444c08be86e8d3af66badabb9cb51cd0b339","first_computed_at":"2026-07-05T03:35:55.951200Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:35:55.951200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"z/EiK6DahNT3M6z/oH8njR978sBwbMKz80CH0qhgRr5pt3MFZTCrJhAJewDegCl7VtkwZXkTT/s8HfURyKnoCA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:35:55.951666Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.14805","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a419f0bcfde66afacf15ed708d6851140667472e5ede5058896dd17d1d2f5ce","sha256:5f12cdbe09b5939f0dab759bc71177ce191e522d73d1bb87b2a82b67e57e7919"],"state_sha256":"39b07d67de506e69b7e6e891f3bbd647fafe0f462fbc8e3be5efafd40645c96c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"itBfHCCqLju207VTrpHZX8QqMGrjW5Cw9sAa9WnLe0Kc6Yv73cNUN7vnT4DQXEbB1+Qq1bdM6UA2Ps9rb1R3Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T04:59:30.955169Z","bundle_sha256":"409d0dbdb2adda6bd60a4e28d4df52cfb5978d0758b99bef89a0dbc02b4aef14"}}