{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:4Q5HOYSVA2GZ7EFJIPGW7YGETH","short_pith_number":"pith:4Q5HOYSV","canonical_record":{"source":{"id":"2606.06672","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2026-06-04T19:46:28Z","cross_cats_sorted":[],"title_canon_sha256":"6f378cc3ca979fd7d56e9362fd27e2a624a07cc40c1c75420d5b7d86cd93f913","abstract_canon_sha256":"58189bc657771256b676a4318ee5ca7d1f8ef6eea0e08dc66030ac076c38f8c1"},"schema_version":"1.0"},"canonical_sha256":"e43a776255068d9f90a943cd6fe0c499d7d1a0d8ffb6785466aed89f53a84d59","source":{"kind":"arxiv","id":"2606.06672","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.06672","created_at":"2026-06-08T01:04:21Z"},{"alias_kind":"arxiv_version","alias_value":"2606.06672v1","created_at":"2026-06-08T01:04:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.06672","created_at":"2026-06-08T01:04:21Z"},{"alias_kind":"pith_short_12","alias_value":"4Q5HOYSVA2GZ","created_at":"2026-06-08T01:04:21Z"},{"alias_kind":"pith_short_16","alias_value":"4Q5HOYSVA2GZ7EFJ","created_at":"2026-06-08T01:04:21Z"},{"alias_kind":"pith_short_8","alias_value":"4Q5HOYSV","created_at":"2026-06-08T01:04:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:4Q5HOYSVA2GZ7EFJIPGW7YGETH","target":"record","payload":{"canonical_record":{"source":{"id":"2606.06672","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2026-06-04T19:46:28Z","cross_cats_sorted":[],"title_canon_sha256":"6f378cc3ca979fd7d56e9362fd27e2a624a07cc40c1c75420d5b7d86cd93f913","abstract_canon_sha256":"58189bc657771256b676a4318ee5ca7d1f8ef6eea0e08dc66030ac076c38f8c1"},"schema_version":"1.0"},"canonical_sha256":"e43a776255068d9f90a943cd6fe0c499d7d1a0d8ffb6785466aed89f53a84d59","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-08T01:04:21.782494Z","signature_b64":"kAlUyUAyeTwUbSgg/PokyKI5T98rU9OBqti0J7MnBEZjQMl2z5jH9HJSOL+2jyDu8tO2AlefUP5tN1yl637ODQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e43a776255068d9f90a943cd6fe0c499d7d1a0d8ffb6785466aed89f53a84d59","last_reissued_at":"2026-06-08T01:04:21.781628Z","signature_status":"signed_v1","first_computed_at":"2026-06-08T01:04:21.781628Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.06672","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":"2026-06-08T01:04:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bclYiQGXmdnqqtkqtS0m1zr+5CuygDmVbi1F8k8AOIWK+dxE3MCobdlngYcna6xjrgMW4BUqcmEi5M7Xivg1Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T17:37:24.402959Z"},"content_sha256":"d7ce03a753d9027d722e41a5e3d2436e4f53444a32d695cbfa3d3d10dd07465d","schema_version":"1.0","event_id":"sha256:d7ce03a753d9027d722e41a5e3d2436e4f53444a32d695cbfa3d3d10dd07465d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:4Q5HOYSVA2GZ7EFJIPGW7YGETH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Variational Bayes Estimation for Affine-Precoded Superimposed Pilots in Partially Connected Dual-Wideband Tera-Hertz MU-MIMO Systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Abhisha Garg, Aditya K. Jagannatham, Suraj Srivastava","submitted_at":"2026-06-04T19:46:28Z","abstract_excerpt":"This work conceives two affine precoding based system models, common precoding with joint channel estimation (CP-JCE) and user-specific precoding for decoupled channel estimation (USPDCE). Considering a dual-wideband effected partially connected architecture, we rigorously model the terahertz (THz) multiple input multiple output (MIMO) channel for each subarray corresponding to each user by incorporating the absorption, reflection, and freespace losses. Next, to address the significant bandwidth overhead associated with conventional pilot-based channel estimation, we employ superimposed pilots"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.06672","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/2606.06672/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":"2026-06-08T01:04:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X96Y6DMXfb9wOKSpH2n+Nsbqs2c8iLk9q2tvJaB9Zi7F//Z6PWuNDrccp/lBzfDEI10hVL/PPot1XFEIW0MICw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T17:37:24.403744Z"},"content_sha256":"e984eec962403693f2e80b2ec49c073777113da81d3b2b6ed00cb9e2d074136f","schema_version":"1.0","event_id":"sha256:e984eec962403693f2e80b2ec49c073777113da81d3b2b6ed00cb9e2d074136f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4Q5HOYSVA2GZ7EFJIPGW7YGETH/bundle.json","state_url":"https://pith.science/pith/4Q5HOYSVA2GZ7EFJIPGW7YGETH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4Q5HOYSVA2GZ7EFJIPGW7YGETH/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":"2026-06-09T17:37:24Z","links":{"resolver":"https://pith.science/pith/4Q5HOYSVA2GZ7EFJIPGW7YGETH","bundle":"https://pith.science/pith/4Q5HOYSVA2GZ7EFJIPGW7YGETH/bundle.json","state":"https://pith.science/pith/4Q5HOYSVA2GZ7EFJIPGW7YGETH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4Q5HOYSVA2GZ7EFJIPGW7YGETH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:4Q5HOYSVA2GZ7EFJIPGW7YGETH","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":"58189bc657771256b676a4318ee5ca7d1f8ef6eea0e08dc66030ac076c38f8c1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2026-06-04T19:46:28Z","title_canon_sha256":"6f378cc3ca979fd7d56e9362fd27e2a624a07cc40c1c75420d5b7d86cd93f913"},"schema_version":"1.0","source":{"id":"2606.06672","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.06672","created_at":"2026-06-08T01:04:21Z"},{"alias_kind":"arxiv_version","alias_value":"2606.06672v1","created_at":"2026-06-08T01:04:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.06672","created_at":"2026-06-08T01:04:21Z"},{"alias_kind":"pith_short_12","alias_value":"4Q5HOYSVA2GZ","created_at":"2026-06-08T01:04:21Z"},{"alias_kind":"pith_short_16","alias_value":"4Q5HOYSVA2GZ7EFJ","created_at":"2026-06-08T01:04:21Z"},{"alias_kind":"pith_short_8","alias_value":"4Q5HOYSV","created_at":"2026-06-08T01:04:21Z"}],"graph_snapshots":[{"event_id":"sha256:e984eec962403693f2e80b2ec49c073777113da81d3b2b6ed00cb9e2d074136f","target":"graph","created_at":"2026-06-08T01:04:21Z","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/2606.06672/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This work conceives two affine precoding based system models, common precoding with joint channel estimation (CP-JCE) and user-specific precoding for decoupled channel estimation (USPDCE). Considering a dual-wideband effected partially connected architecture, we rigorously model the terahertz (THz) multiple input multiple output (MIMO) channel for each subarray corresponding to each user by incorporating the absorption, reflection, and freespace losses. Next, to address the significant bandwidth overhead associated with conventional pilot-based channel estimation, we employ superimposed pilots","authors_text":"Abhisha Garg, Aditya K. Jagannatham, Suraj Srivastava","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2026-06-04T19:46:28Z","title":"Variational Bayes Estimation for Affine-Precoded Superimposed Pilots in Partially Connected Dual-Wideband Tera-Hertz MU-MIMO Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.06672","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:d7ce03a753d9027d722e41a5e3d2436e4f53444a32d695cbfa3d3d10dd07465d","target":"record","created_at":"2026-06-08T01:04:21Z","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":"58189bc657771256b676a4318ee5ca7d1f8ef6eea0e08dc66030ac076c38f8c1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2026-06-04T19:46:28Z","title_canon_sha256":"6f378cc3ca979fd7d56e9362fd27e2a624a07cc40c1c75420d5b7d86cd93f913"},"schema_version":"1.0","source":{"id":"2606.06672","kind":"arxiv","version":1}},"canonical_sha256":"e43a776255068d9f90a943cd6fe0c499d7d1a0d8ffb6785466aed89f53a84d59","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e43a776255068d9f90a943cd6fe0c499d7d1a0d8ffb6785466aed89f53a84d59","first_computed_at":"2026-06-08T01:04:21.781628Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-08T01:04:21.781628Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kAlUyUAyeTwUbSgg/PokyKI5T98rU9OBqti0J7MnBEZjQMl2z5jH9HJSOL+2jyDu8tO2AlefUP5tN1yl637ODQ==","signature_status":"signed_v1","signed_at":"2026-06-08T01:04:21.782494Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.06672","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d7ce03a753d9027d722e41a5e3d2436e4f53444a32d695cbfa3d3d10dd07465d","sha256:e984eec962403693f2e80b2ec49c073777113da81d3b2b6ed00cb9e2d074136f"],"state_sha256":"941d7a6928afeb73a3501c14e746fed0de80729d2a3f2420ec0479a2f589f8bf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k43eSJjzh47htDPe8UjUy8WlMow3lCrbdoT5H+Vdz2FktpOf/WPGncDTPpySSEBbSSR0bpPExh+8e2PFBc2hBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T17:37:24.408515Z","bundle_sha256":"64ad4ec510b38b07abe08ba86340abcd3b2268bef81d5735854e5aad77cbb171"}}