{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:HFC5AOO3MNLYD5RJZSAFTXYFCL","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":"2ac293fd82ccf4c7066cc197ce756bbcc5e01b1d0190c169811c0396baefb39e","cross_cats_sorted":["eess.SP","math.IT"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.IT","submitted_at":"2022-08-02T16:03:12Z","title_canon_sha256":"7c0511a51f1f17eeb22488ec9d43798559bdc4789ed9056e13004ad7230d8926"},"schema_version":"1.0","source":{"id":"2208.01556","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.01556","created_at":"2026-07-05T06:07:31Z"},{"alias_kind":"arxiv_version","alias_value":"2208.01556v2","created_at":"2026-07-05T06:07:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.01556","created_at":"2026-07-05T06:07:31Z"},{"alias_kind":"pith_short_12","alias_value":"HFC5AOO3MNLY","created_at":"2026-07-05T06:07:31Z"},{"alias_kind":"pith_short_16","alias_value":"HFC5AOO3MNLYD5RJ","created_at":"2026-07-05T06:07:31Z"},{"alias_kind":"pith_short_8","alias_value":"HFC5AOO3","created_at":"2026-07-05T06:07:31Z"}],"graph_snapshots":[{"event_id":"sha256:c8843b7b4c91fecd1be3a11224bca8009cfdfa068627e1f1f3aa7ebbe50054dd","target":"graph","created_at":"2026-07-05T06:07:31Z","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/2208.01556/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a unified model for connected antenna arrays with a large number of tightly integrated (i.e., coupled) antennas in a compact space within the context of massive multiple-input multiple-output (MIMO) communication. We refer to this system as tightly-coupled massive MIMO. From an information-theoretic perspective, scaling the design of tightly-coupled massive MIMO systems in terms of the number of antennas, the operational bandwidth, and form factor was not addressed in prior art. We investigate this open research problem using a physically consistent modeling approach for far-field (","authors_text":"Amine Mezghani, Faouzi Bellili, Mohamed Akrout, Robert W. Heath, Volodymyr Shyianov","cross_cats":["eess.SP","math.IT"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.IT","submitted_at":"2022-08-02T16:03:12Z","title":"Super-Wideband Massive MIMO"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.01556","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":"sha256:4cf209ad058f153ed2dbc1534404c3802dd4ac1eed492470cb5fe2696f6d4566","target":"record","created_at":"2026-07-05T06:07:31Z","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":"2ac293fd82ccf4c7066cc197ce756bbcc5e01b1d0190c169811c0396baefb39e","cross_cats_sorted":["eess.SP","math.IT"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.IT","submitted_at":"2022-08-02T16:03:12Z","title_canon_sha256":"7c0511a51f1f17eeb22488ec9d43798559bdc4789ed9056e13004ad7230d8926"},"schema_version":"1.0","source":{"id":"2208.01556","kind":"arxiv","version":2}},"canonical_sha256":"3945d039db635781f629cc8059df0512e4b1488a71ebedd31f2ae8ded2236fc2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3945d039db635781f629cc8059df0512e4b1488a71ebedd31f2ae8ded2236fc2","first_computed_at":"2026-07-05T06:07:31.717312Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:07:31.717312Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4Skv6T6cPoNfIvaL2WiMdmwaiYnJeW8znFjRtQ1JNhl6O7ZUUCDvi8GL1fD1yMepckqYUxXLmphTlEK6zftECw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:07:31.717778Z","signed_message":"canonical_sha256_bytes"},"source_id":"2208.01556","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4cf209ad058f153ed2dbc1534404c3802dd4ac1eed492470cb5fe2696f6d4566","sha256:c8843b7b4c91fecd1be3a11224bca8009cfdfa068627e1f1f3aa7ebbe50054dd"],"state_sha256":"38d3a45ec8a59486647f8489ed63967c9b4150f1c96a17c04cf2e4fed458e54e"}