{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZC7EYMPBQMDRFZJ2K4LM6RI6KB","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":"a79d5ec203e5deda1efd1cfcdaeb14250eba17af01eadd49ab518c3628c3ddf9","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-06-27T18:45:21Z","title_canon_sha256":"ff045a8a3865b302772d033c960fabb26dcce84b0ca75e9c2396761bd2c3cd69"},"schema_version":"1.0","source":{"id":"1606.08405","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.08405","created_at":"2026-05-18T01:11:52Z"},{"alias_kind":"arxiv_version","alias_value":"1606.08405v1","created_at":"2026-05-18T01:11:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.08405","created_at":"2026-05-18T01:11:52Z"},{"alias_kind":"pith_short_12","alias_value":"ZC7EYMPBQMDR","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZC7EYMPBQMDRFZJ2","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZC7EYMPB","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:3ed859eb1715af4eb91d01714e4c3645d24146f796e81e17bd0d2282cfb1ef7f","target":"graph","created_at":"2026-05-18T01:11:52Z","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":"Hybrid analog/digital precoding architectures can address the trade-off between achievable spectral efficiency and power consumption in large-scale MIMO systems. This makes it a promising candidate for millimeter wave systems, which require deploying large antenna arrays at both the transmitter and receiver to guarantee sufficient received signal power. Most prior work on hybrid precoding focused on narrowband channels and assumed fully-connected hybrid architectures. MmWave systems, though, are expected to be wideband with frequency selectivity. In this paper, a closed-form solution for fully","authors_text":"Ahmed Alkhateeb, Robert W. Heath Jr, Sungwoo Park","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-06-27T18:45:21Z","title":"Dynamic Subarrays for Hybrid Precoding in Wideband mmWave MIMO Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.08405","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":"sha256:783cfb5fcad6e388f366271d67f0a0747d3e14b5a1379c7b0237dad0c73169b1","target":"record","created_at":"2026-05-18T01:11:52Z","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":"a79d5ec203e5deda1efd1cfcdaeb14250eba17af01eadd49ab518c3628c3ddf9","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-06-27T18:45:21Z","title_canon_sha256":"ff045a8a3865b302772d033c960fabb26dcce84b0ca75e9c2396761bd2c3cd69"},"schema_version":"1.0","source":{"id":"1606.08405","kind":"arxiv","version":1}},"canonical_sha256":"c8be4c31e1830712e53a5716cf451e50743e57d5090cf60022d022d7ab154baa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c8be4c31e1830712e53a5716cf451e50743e57d5090cf60022d022d7ab154baa","first_computed_at":"2026-05-18T01:11:52.210881Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:52.210881Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Fn/bFP/TrwIitU9aA1Wfgic5ZKGVTP18MtqBbGl7BEXWYrHvg5njh7SYYyrPa/OeoVPm/YNdOYVVj1Lxe9WJDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:52.211210Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.08405","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:783cfb5fcad6e388f366271d67f0a0747d3e14b5a1379c7b0237dad0c73169b1","sha256:3ed859eb1715af4eb91d01714e4c3645d24146f796e81e17bd0d2282cfb1ef7f"],"state_sha256":"6964642d46d4776b1cbb169fb748a354d528665d1847dd3fd9fbaa6d3a2574fa"}