{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:MP7Z32NHMSG5F3JTGUBVUQJBLO","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":"0726f93f5cbdefcbabc5315750fd57018437cf2e0311be22636d82a8c14872be","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-01-05T19:22:29Z","title_canon_sha256":"279a5502b9bb64817a987a2fb937777ef12486d6aaf3da5316ea664e23214487"},"schema_version":"1.0","source":{"id":"1901.01458","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.01458","created_at":"2026-05-17T23:41:53Z"},{"alias_kind":"arxiv_version","alias_value":"1901.01458v2","created_at":"2026-05-17T23:41:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.01458","created_at":"2026-05-17T23:41:53Z"},{"alias_kind":"pith_short_12","alias_value":"MP7Z32NHMSG5","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"MP7Z32NHMSG5F3JT","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"MP7Z32NH","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:e93ae808515c6ac16fcca689d3d4293446a3c56960294c9ff664330786ac785b","target":"graph","created_at":"2026-05-17T23:41:53Z","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"},"paper":{"abstract_excerpt":"Massive multiple-input multiple-output (MIMO) communications are the focus of considerable interest in recent years. While the theoretical gains of massive MIMO have been established, implementing MIMO systems with large-scale antenna arrays in practice is challenging. Among the practical challenges associated with massive MIMO systems are increased cost, power consumption, and physical size. In this work we study the implementation of massive MIMO antenna arrays using dynamic metasurface antennas (DMAs), an emerging technology which inherently handles the aforementioned challenges. Specifical","authors_text":"David R. Smith, Insang Yoo, Mohammadreza F. Imani, Nir Shlezinger, Or Dicker, Yonina C. Eldar","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-01-05T19:22:29Z","title":"Dynamic Metasurface Antennas for Uplink Massive MIMO Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.01458","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:f700bb999cd3f84979bbae0d0d20b0519a607be49b65217f65642f6429a88384","target":"record","created_at":"2026-05-17T23:41:53Z","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":"0726f93f5cbdefcbabc5315750fd57018437cf2e0311be22636d82a8c14872be","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-01-05T19:22:29Z","title_canon_sha256":"279a5502b9bb64817a987a2fb937777ef12486d6aaf3da5316ea664e23214487"},"schema_version":"1.0","source":{"id":"1901.01458","kind":"arxiv","version":2}},"canonical_sha256":"63ff9de9a7648dd2ed3335035a41215b93ff08f50cef8ef07fc868b7c1740d10","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"63ff9de9a7648dd2ed3335035a41215b93ff08f50cef8ef07fc868b7c1740d10","first_computed_at":"2026-05-17T23:41:53.578114Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:53.578114Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fXD/OBhNl3Ck59ecZDXskJtIjRaGYSjmBdFEq6ksmmTq6nfae+7Ss9DmlyhfJ/dX7NwuiO8GQbSp2HLvuyauBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:53.578693Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.01458","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f700bb999cd3f84979bbae0d0d20b0519a607be49b65217f65642f6429a88384","sha256:e93ae808515c6ac16fcca689d3d4293446a3c56960294c9ff664330786ac785b"],"state_sha256":"d89ed8a346ee382dd688e3505e0d3b4c33d9b661b6ff7630dd21571c93d03741"}