{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:77GBNEW6HX5BFFLDHXXRPKT5N4","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":"812dd2ab0c191e7e226c84747f713c6c65b1183e9f936f38444d8d0b7895ba1e","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-07-31T22:05:41Z","title_canon_sha256":"3ae00ea0d3cbd99a9ac383e3bbbdb9b0ebe0cb5bd374b2be6f8d4757c932bcff"},"schema_version":"1.0","source":{"id":"1708.00083","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.00083","created_at":"2026-05-18T00:14:22Z"},{"alias_kind":"arxiv_version","alias_value":"1708.00083v3","created_at":"2026-05-18T00:14:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.00083","created_at":"2026-05-18T00:14:22Z"},{"alias_kind":"pith_short_12","alias_value":"77GBNEW6HX5B","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"77GBNEW6HX5BFFLD","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"77GBNEW6","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:46d36411afb4794cbe32c60b7773386bda6a61d168adc74cfb1cfc9fa06b9663","target":"graph","created_at":"2026-05-18T00:14:22Z","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":"This work studies a variant of hybrid beamforming, namely, hybrid beamforming with selection (HBwS), as an attractive solution to reduce the hardware cost of multi-user Massive Multiple-Input-Multiple-Output systems, while retaining good performance. Unlike conventional hybrid beamforming, in a transceiver with HBwS, the antenna array is fed by an analog beamforming matrix with $\\bar{L}$ input ports, where $\\bar{L}$ is larger than the number of up/down-conversion chains $\\bar{K}$. A bank of switches connects the instantaneously best $\\bar{K}$ out of the $\\bar{L}$ input ports to the up/down-con","authors_text":"Andreas F. Molisch, Haralabos C. Papadopoulos, Ozgun Y. Bursalioglu, Vishnu V. Ratnam","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-07-31T22:05:41Z","title":"Hybrid Beamforming with Selection for Multi-user Massive MIMO Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.00083","kind":"arxiv","version":3},"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":"sha256:9e86df731305d74a5d2e369133a1ce2ffe0ffc3747610c60e0b929b6eb86819f","target":"record","created_at":"2026-05-18T00:14:22Z","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":"812dd2ab0c191e7e226c84747f713c6c65b1183e9f936f38444d8d0b7895ba1e","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-07-31T22:05:41Z","title_canon_sha256":"3ae00ea0d3cbd99a9ac383e3bbbdb9b0ebe0cb5bd374b2be6f8d4757c932bcff"},"schema_version":"1.0","source":{"id":"1708.00083","kind":"arxiv","version":3}},"canonical_sha256":"ffcc1692de3dfa1295633def17aa7d6f1bbc437e90f085c40f8f39a68ac22884","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ffcc1692de3dfa1295633def17aa7d6f1bbc437e90f085c40f8f39a68ac22884","first_computed_at":"2026-05-18T00:14:22.472456Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:14:22.472456Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yiFzGSb2pWQkljKUYnQwvteAt0bDe5JS3qmiu+VOJU0tasF7poenXEb1locI+/Q2TsN9zzHDZ3PSxOjloDEkBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:14:22.473015Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.00083","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e86df731305d74a5d2e369133a1ce2ffe0ffc3747610c60e0b929b6eb86819f","sha256:46d36411afb4794cbe32c60b7773386bda6a61d168adc74cfb1cfc9fa06b9663"],"state_sha256":"51894bb641bf07ff1aeaa6ea5ada085d577e3dbf662d83c913e11f0a1c4278e1"}