{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:PMMMHT3NJE4HZ6JGM46DMQAJUT","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":"c3287b79453725cdb22f69f5b4dab24d4f1f7cd26b5a0f02985f37fe6e060740","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-02-20T10:57:57Z","title_canon_sha256":"08f7f10eb94863229254181d9d2be8df5e14b73de6f6a1bb6b86a2d69ca31932"},"schema_version":"1.0","source":{"id":"1902.07503","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.07503","created_at":"2026-05-17T23:53:07Z"},{"alias_kind":"arxiv_version","alias_value":"1902.07503v1","created_at":"2026-05-17T23:53:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.07503","created_at":"2026-05-17T23:53:07Z"},{"alias_kind":"pith_short_12","alias_value":"PMMMHT3NJE4H","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"PMMMHT3NJE4HZ6JG","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"PMMMHT3N","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:a2914105d72e3a5194101d19ec70970857da4582f4329384f2c1fba7db709e4b","target":"graph","created_at":"2026-05-17T23:53:07Z","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":"Network densification, massive multiple-input multiple-output (MIMO) and millimeter-wave (mmWave) bands have recently emerged as some of the physical layer enablers for the future generations of wireless communication networks (5G and beyond). Grounded on prior work on sub-6~GHz cell-free massive MIMO architectures, a novel framework for cell-free mmWave massive MIMO systems is introduced that considers the use of low-complexity hybrid precoders/decoders while factors in the impact of using capacity-constrained fronthaul links. A suboptimal pilot allocation strategy is proposed that is grounde","authors_text":"Felip Riera-Palou, Guillem Femenias","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-02-20T10:57:57Z","title":"Cell-Free Millimeter-Wave Massive MIMO Systems with Limited Fronthaul Capacity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.07503","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":"sha256:689af40dfc6a9f7006703edbfd6e39880eb77774cfd13d304408725f505f2a75","target":"record","created_at":"2026-05-17T23:53:07Z","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":"c3287b79453725cdb22f69f5b4dab24d4f1f7cd26b5a0f02985f37fe6e060740","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-02-20T10:57:57Z","title_canon_sha256":"08f7f10eb94863229254181d9d2be8df5e14b73de6f6a1bb6b86a2d69ca31932"},"schema_version":"1.0","source":{"id":"1902.07503","kind":"arxiv","version":1}},"canonical_sha256":"7b18c3cf6d49387cf926673c364009a4c59fe3eab17232b3c26d9425bc4320eb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7b18c3cf6d49387cf926673c364009a4c59fe3eab17232b3c26d9425bc4320eb","first_computed_at":"2026-05-17T23:53:07.655781Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:07.655781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zUZWSVoxRuyT7Jdv8xSsrUIJDHKpcqveQnnvaY2q6LEIkcqwaT8SAjHuiH6CJyoaCcOMta/FjZhqbSDP0Qk/BA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:07.656292Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.07503","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:689af40dfc6a9f7006703edbfd6e39880eb77774cfd13d304408725f505f2a75","sha256:a2914105d72e3a5194101d19ec70970857da4582f4329384f2c1fba7db709e4b"],"state_sha256":"21915c4c24ee15fa269d4b1144e0389d68562af459c519a711698062a5384b19"}