{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:642QPLHYY5VHOUEZNKYO25EW3S","short_pith_number":"pith:642QPLHY","canonical_record":{"source":{"id":"2405.07255","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SP","submitted_at":"2024-05-12T11:20:31Z","cross_cats_sorted":[],"title_canon_sha256":"79f4c80a1aff227e254bb79ec022003665d7ee71416a4627dbe7e7456efe415c","abstract_canon_sha256":"4c7a42d6f5d01b1a0fd15038148d84995f76919878bca55b7f01af162a6c7d6c"},"schema_version":"1.0"},"canonical_sha256":"f73507acf8c76a7750996ab0ed7496dcb98cc59109f595372ed3e601e3a9f022","source":{"kind":"arxiv","id":"2405.07255","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.07255","created_at":"2026-07-05T08:18:19Z"},{"alias_kind":"arxiv_version","alias_value":"2405.07255v1","created_at":"2026-07-05T08:18:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.07255","created_at":"2026-07-05T08:18:19Z"},{"alias_kind":"pith_short_12","alias_value":"642QPLHYY5VH","created_at":"2026-07-05T08:18:19Z"},{"alias_kind":"pith_short_16","alias_value":"642QPLHYY5VHOUEZ","created_at":"2026-07-05T08:18:19Z"},{"alias_kind":"pith_short_8","alias_value":"642QPLHY","created_at":"2026-07-05T08:18:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:642QPLHYY5VHOUEZNKYO25EW3S","target":"record","payload":{"canonical_record":{"source":{"id":"2405.07255","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SP","submitted_at":"2024-05-12T11:20:31Z","cross_cats_sorted":[],"title_canon_sha256":"79f4c80a1aff227e254bb79ec022003665d7ee71416a4627dbe7e7456efe415c","abstract_canon_sha256":"4c7a42d6f5d01b1a0fd15038148d84995f76919878bca55b7f01af162a6c7d6c"},"schema_version":"1.0"},"canonical_sha256":"f73507acf8c76a7750996ab0ed7496dcb98cc59109f595372ed3e601e3a9f022","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:18:19.706381Z","signature_b64":"muX6/7+jXUQAXyVr8BOZAebu3nXfQfX7X17ojpWLJ7shJr/Y1594F4On/S6RRYuRSI0TUfERrDqHViWG+ZrKAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f73507acf8c76a7750996ab0ed7496dcb98cc59109f595372ed3e601e3a9f022","last_reissued_at":"2026-07-05T08:18:19.705878Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:18:19.705878Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2405.07255","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":"2026-07-05T08:18:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XvKfziQBas/nTWiwJaJze/AsstUE4pU49lfGsl13aQCfDV3ZHTQ557YgcQdKr9fxnf+/muxP1z9oBSW9Tk2+Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T20:18:46.511918Z"},"content_sha256":"4ba8b62270c56dd2b2d19d69aed5a01a199947abbe9c547ddd2f69c91c9375c1","schema_version":"1.0","event_id":"sha256:4ba8b62270c56dd2b2d19d69aed5a01a199947abbe9c547ddd2f69c91c9375c1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:642QPLHYY5VHOUEZNKYO25EW3S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deep Learning-aided Parametric Sparse Channel Estimation for Terahertz Massive MIMO Systems","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Byonghyo Shim, Jinhong Kim, Seungnyun Kim, Yongjun Ahn","submitted_at":"2024-05-12T11:20:31Z","abstract_excerpt":"Terahertz (THz) communications is considered as one of key solutions to support extremely high data demand in 6G. One main difficulty of the THz communication is the severe signal attenuation caused by the foliage loss, oxygen/atmospheric absorption, body and hand losses. To compensate for the severe path loss, multiple-input-multiple-output (MIMO) antenna array-based beamforming has been widely used. Since the beams should be aligned with the signal propagation path to achieve the maximum beamforming gain, acquisition of accurate channel knowledge, i.e., channel estimation, is of great import"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.07255","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/2405.07255/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":"2026-07-05T08:18:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bqKmyyY1Tb14958fEx/N8XbciSX/OKUOwf5NTCTk23idauEiG1lqewOt+p6f2KgE2wE3gQGzUSnjESleBADTBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T20:18:46.512450Z"},"content_sha256":"0b94f8671c424e85de7b37974e67c0530ccf945ced3199b725658fd22aef0ed0","schema_version":"1.0","event_id":"sha256:0b94f8671c424e85de7b37974e67c0530ccf945ced3199b725658fd22aef0ed0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/642QPLHYY5VHOUEZNKYO25EW3S/bundle.json","state_url":"https://pith.science/pith/642QPLHYY5VHOUEZNKYO25EW3S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/642QPLHYY5VHOUEZNKYO25EW3S/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":"2026-08-03T20:18:46Z","links":{"resolver":"https://pith.science/pith/642QPLHYY5VHOUEZNKYO25EW3S","bundle":"https://pith.science/pith/642QPLHYY5VHOUEZNKYO25EW3S/bundle.json","state":"https://pith.science/pith/642QPLHYY5VHOUEZNKYO25EW3S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/642QPLHYY5VHOUEZNKYO25EW3S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:642QPLHYY5VHOUEZNKYO25EW3S","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":"4c7a42d6f5d01b1a0fd15038148d84995f76919878bca55b7f01af162a6c7d6c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SP","submitted_at":"2024-05-12T11:20:31Z","title_canon_sha256":"79f4c80a1aff227e254bb79ec022003665d7ee71416a4627dbe7e7456efe415c"},"schema_version":"1.0","source":{"id":"2405.07255","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.07255","created_at":"2026-07-05T08:18:19Z"},{"alias_kind":"arxiv_version","alias_value":"2405.07255v1","created_at":"2026-07-05T08:18:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.07255","created_at":"2026-07-05T08:18:19Z"},{"alias_kind":"pith_short_12","alias_value":"642QPLHYY5VH","created_at":"2026-07-05T08:18:19Z"},{"alias_kind":"pith_short_16","alias_value":"642QPLHYY5VHOUEZ","created_at":"2026-07-05T08:18:19Z"},{"alias_kind":"pith_short_8","alias_value":"642QPLHY","created_at":"2026-07-05T08:18:19Z"}],"graph_snapshots":[{"event_id":"sha256:0b94f8671c424e85de7b37974e67c0530ccf945ced3199b725658fd22aef0ed0","target":"graph","created_at":"2026-07-05T08:18:19Z","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/2405.07255/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Terahertz (THz) communications is considered as one of key solutions to support extremely high data demand in 6G. One main difficulty of the THz communication is the severe signal attenuation caused by the foliage loss, oxygen/atmospheric absorption, body and hand losses. To compensate for the severe path loss, multiple-input-multiple-output (MIMO) antenna array-based beamforming has been widely used. Since the beams should be aligned with the signal propagation path to achieve the maximum beamforming gain, acquisition of accurate channel knowledge, i.e., channel estimation, is of great import","authors_text":"Byonghyo Shim, Jinhong Kim, Seungnyun Kim, Yongjun Ahn","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SP","submitted_at":"2024-05-12T11:20:31Z","title":"Deep Learning-aided Parametric Sparse Channel Estimation for Terahertz Massive MIMO Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.07255","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":"sha256:4ba8b62270c56dd2b2d19d69aed5a01a199947abbe9c547ddd2f69c91c9375c1","target":"record","created_at":"2026-07-05T08:18:19Z","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":"4c7a42d6f5d01b1a0fd15038148d84995f76919878bca55b7f01af162a6c7d6c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SP","submitted_at":"2024-05-12T11:20:31Z","title_canon_sha256":"79f4c80a1aff227e254bb79ec022003665d7ee71416a4627dbe7e7456efe415c"},"schema_version":"1.0","source":{"id":"2405.07255","kind":"arxiv","version":1}},"canonical_sha256":"f73507acf8c76a7750996ab0ed7496dcb98cc59109f595372ed3e601e3a9f022","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f73507acf8c76a7750996ab0ed7496dcb98cc59109f595372ed3e601e3a9f022","first_computed_at":"2026-07-05T08:18:19.705878Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:18:19.705878Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"muX6/7+jXUQAXyVr8BOZAebu3nXfQfX7X17ojpWLJ7shJr/Y1594F4On/S6RRYuRSI0TUfERrDqHViWG+ZrKAw==","signature_status":"signed_v1","signed_at":"2026-07-05T08:18:19.706381Z","signed_message":"canonical_sha256_bytes"},"source_id":"2405.07255","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ba8b62270c56dd2b2d19d69aed5a01a199947abbe9c547ddd2f69c91c9375c1","sha256:0b94f8671c424e85de7b37974e67c0530ccf945ced3199b725658fd22aef0ed0"],"state_sha256":"0e6025ac627bc32902df49436648e7d5bc3df58f534b25c0d9ca7d97b87b724f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6TMRjGla+dp+Wiu0isSwBSvunJZGPvrn2GmO86pzZlvDLMEr3wu02XZH/KTU4zFWdJi6YR82niR/55CAYzn1BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T20:18:46.517208Z","bundle_sha256":"04dbc7e005f6bdef7924862a32c906811610e99a9e896fb33a1d933df4c7e35c"}}