{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:ZS4XEWYNHSIHP7MUVM7LVLNMSA","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":"cc14b2e2bd8f92a5fdc9ea5b33d2ac649ddffeae5c262dc078030e9d1cc484ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-07-20T14:27:52Z","title_canon_sha256":"0dc07a7fa12566cad68cb8d6d1b9d0ee934035f4efa5f689603d910b306b3a48"},"schema_version":"1.0","source":{"id":"2007.10155","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.10155","created_at":"2026-07-05T01:20:33Z"},{"alias_kind":"arxiv_version","alias_value":"2007.10155v1","created_at":"2026-07-05T01:20:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.10155","created_at":"2026-07-05T01:20:33Z"},{"alias_kind":"pith_short_12","alias_value":"ZS4XEWYNHSIH","created_at":"2026-07-05T01:20:33Z"},{"alias_kind":"pith_short_16","alias_value":"ZS4XEWYNHSIHP7MU","created_at":"2026-07-05T01:20:33Z"},{"alias_kind":"pith_short_8","alias_value":"ZS4XEWYN","created_at":"2026-07-05T01:20:33Z"}],"graph_snapshots":[{"event_id":"sha256:f4f3c3aa4bc2c042ee6f7f2fcb4336611b954d08bf186b17ae63ea6f7b17f6ae","target":"graph","created_at":"2026-07-05T01:20:33Z","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/2007.10155/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Reducing cost and power consumption while maintaining high network access capability is a key physical-layer requirement of massive Internet of Things (mIoT) networks. Deploying a hybrid array is a cost- and energy-efficient way to meet the requirement, but would penalize system degree of freedom (DoF) and channel estimation accuracy. This is because signals from multiple antennas are combined by a radio frequency (RF) network of the hybrid array. This paper presents a novel hybrid uniform circular cylindrical array (UCyA) for mIoT networks. We design a nested hybrid beamforming structure base","authors_text":"J. Andrew Zhang, Ren Ping Liu, Tiejun Lv, Wei Ni, Zhipeng Lin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-07-20T14:27:52Z","title":"Nested Hybrid Cylindrical Array Design and DoA Estimation for Massive IoT Networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.10155","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":"sha256:828e5686babf6dd3ea9ed1a1c2519e8b5383666d4a4df41c909a6f8e1f4a15f9","target":"record","created_at":"2026-07-05T01:20:33Z","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":"cc14b2e2bd8f92a5fdc9ea5b33d2ac649ddffeae5c262dc078030e9d1cc484ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-07-20T14:27:52Z","title_canon_sha256":"0dc07a7fa12566cad68cb8d6d1b9d0ee934035f4efa5f689603d910b306b3a48"},"schema_version":"1.0","source":{"id":"2007.10155","kind":"arxiv","version":1}},"canonical_sha256":"ccb9725b0d3c9077fd94ab3ebaadac90131ff9621d667518dbf2305a0124abdb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ccb9725b0d3c9077fd94ab3ebaadac90131ff9621d667518dbf2305a0124abdb","first_computed_at":"2026-07-05T01:20:33.792634Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:20:33.792634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VXnj29wlMw5IeBE08UmeiddUPqROves1b5cPV1iZ7acbq8cYNYtUy/cjwKqe+zachPbEZ5WmckfU3L1ijKx3Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:20:33.793088Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.10155","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:828e5686babf6dd3ea9ed1a1c2519e8b5383666d4a4df41c909a6f8e1f4a15f9","sha256:f4f3c3aa4bc2c042ee6f7f2fcb4336611b954d08bf186b17ae63ea6f7b17f6ae"],"state_sha256":"79b2a30cc6a25519941d05ca04465a3bbb3b2ee1fcfd94c04a572a165df7d918"}