{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:A6IQSTWHNAYDQDWT5O5KII2FJU","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":"d9b77b5e2b2c473b85d94fa7f31058498fa8ae16e7314f1879a039ac35f15061","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-09-20T16:30:22Z","title_canon_sha256":"641c2359d92e0a0998f97d6fe3f313b744334c77092beea19f42c6095ae9fe07"},"schema_version":"1.0","source":{"id":"2109.09664","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.09664","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"arxiv_version","alias_value":"2109.09664v2","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.09664","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"pith_short_12","alias_value":"A6IQSTWHNAYD","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"pith_short_16","alias_value":"A6IQSTWHNAYDQDWT","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"pith_short_8","alias_value":"A6IQSTWH","created_at":"2026-07-05T03:47:24Z"}],"graph_snapshots":[{"event_id":"sha256:d69bfaeaaec3d94128a6814dc869051b649c06acc1acd05f660379d245d38e6b","target":"graph","created_at":"2026-07-05T03:47:24Z","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/2109.09664/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Hybrid transceiver design in multiple-input multiple-output (MIMO) Tera-Hertz (THz) systems relying on sparse channel state information (CSI) estimation techniques is conceived. To begin with, a practical MIMO channel model is developed for the THz band that incorporates its molecular absorption and reflection losses, as well as its non-line-of-sight (NLoS) rays associated with its diffused components. Subsequently, a novel CSI estimation model is derived by exploiting the angular-sparsity of the THz MIMO channel. Then an orthogonal matching pursuit (OMP)-based framework is conceived, followed","authors_text":"Aditya K. Jagannatham, Ajeet Tripathi, Lajos Hanzo, Neeraj Varshney, Suraj Srivastava","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-09-20T16:30:22Z","title":"Hybrid Transceiver Design for Tera-Hertz MIMO Systems Relying on Bayesian Learning Aided Sparse Channel Estimation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.09664","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":"sha256:05e12ad00916ebb9052f7e1bc92a64327e9db62a8cb65492492834b13c4520c8","target":"record","created_at":"2026-07-05T03:47:24Z","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":"d9b77b5e2b2c473b85d94fa7f31058498fa8ae16e7314f1879a039ac35f15061","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-09-20T16:30:22Z","title_canon_sha256":"641c2359d92e0a0998f97d6fe3f313b744334c77092beea19f42c6095ae9fe07"},"schema_version":"1.0","source":{"id":"2109.09664","kind":"arxiv","version":2}},"canonical_sha256":"0791094ec76830380ed3ebbaa423454d22194b70b9287758b7970d88e24426ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0791094ec76830380ed3ebbaa423454d22194b70b9287758b7970d88e24426ab","first_computed_at":"2026-07-05T03:47:24.322280Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:47:24.322280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9dgnUcXHPbjtxKvKfg+5iBX+f5BUjJVgRaOe42oN9Xq+64Ha5zJ2I6tMIWPv2hS0L2Q9Ntt7tuX2450E3vS1Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:47:24.322831Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.09664","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:05e12ad00916ebb9052f7e1bc92a64327e9db62a8cb65492492834b13c4520c8","sha256:d69bfaeaaec3d94128a6814dc869051b649c06acc1acd05f660379d245d38e6b"],"state_sha256":"51bca80cb2b959e7bfc2725825d05aa696d7cdc08bfdef63939165eda22565bf"}