{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:2CJPCQWC444PLWVIWTFQTHG6GB","short_pith_number":"pith:2CJPCQWC","schema_version":"1.0","canonical_sha256":"d092f142c2e738f5daa8b4cb099cde3051d899fd759d2a578be01f4d35483169","source":{"kind":"arxiv","id":"2506.01043","version":1},"attestation_state":"computed","paper":{"title":"A Group-Wise Narrow Beam Design for Uplink Channel Estimation in Hybrid Beamforming Systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"An Liu, Yongbo Xiao, Yufan Zhou","submitted_at":"2025-06-01T14:59:39Z","abstract_excerpt":"In this paper, we consider uplink channel estimation for massive multi-input multi-output (MIMO) systems with partially connected hybrid beamforming (PC-HBF) structures. Existing beam design and channel estimation schemes are usually based on ideal assumptions and require transmitting pilots across multiple timeslots, making them unsuitable for practical PC-HBF systems. To overcome these drawbacks, we propose a novel beam design and a corresponding channel estimation algorithm to achieve accurate and real-time uplink channel estimation. Firstly, we introduce a group-wise narrow beam design in "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2506.01043","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2025-06-01T14:59:39Z","cross_cats_sorted":[],"title_canon_sha256":"e3021ac33cda4ef956e1d068277bd10ab4e223a51a790944b4342f8bf37ac93e","abstract_canon_sha256":"a61c94949c53eb25659eb3738399b59f2b32c6861deb53ab4ef169daa833f09a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:13:45.015397Z","signature_b64":"wGgGsTvEDhT2PbbKMDqMQ9doAd6ohmGalQv9CoLVoNYWocSrBU1usbMdZGdjSgIZNZIDu2/u19T3c7xLOPMqAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d092f142c2e738f5daa8b4cb099cde3051d899fd759d2a578be01f4d35483169","last_reissued_at":"2026-07-05T11:13:45.014834Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:13:45.014834Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Group-Wise Narrow Beam Design for Uplink Channel Estimation in Hybrid Beamforming Systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"An Liu, Yongbo Xiao, Yufan Zhou","submitted_at":"2025-06-01T14:59:39Z","abstract_excerpt":"In this paper, we consider uplink channel estimation for massive multi-input multi-output (MIMO) systems with partially connected hybrid beamforming (PC-HBF) structures. Existing beam design and channel estimation schemes are usually based on ideal assumptions and require transmitting pilots across multiple timeslots, making them unsuitable for practical PC-HBF systems. To overcome these drawbacks, we propose a novel beam design and a corresponding channel estimation algorithm to achieve accurate and real-time uplink channel estimation. Firstly, we introduce a group-wise narrow beam design in "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.01043","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2506.01043/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"2506.01043","created_at":"2026-07-05T11:13:45.014891+00:00"},{"alias_kind":"arxiv_version","alias_value":"2506.01043v1","created_at":"2026-07-05T11:13:45.014891+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.01043","created_at":"2026-07-05T11:13:45.014891+00:00"},{"alias_kind":"pith_short_12","alias_value":"2CJPCQWC444P","created_at":"2026-07-05T11:13:45.014891+00:00"},{"alias_kind":"pith_short_16","alias_value":"2CJPCQWC444PLWVI","created_at":"2026-07-05T11:13:45.014891+00:00"},{"alias_kind":"pith_short_8","alias_value":"2CJPCQWC","created_at":"2026-07-05T11:13:45.014891+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/2CJPCQWC444PLWVIWTFQTHG6GB","json":"https://pith.science/pith/2CJPCQWC444PLWVIWTFQTHG6GB.json","graph_json":"https://pith.science/api/pith-number/2CJPCQWC444PLWVIWTFQTHG6GB/graph.json","events_json":"https://pith.science/api/pith-number/2CJPCQWC444PLWVIWTFQTHG6GB/events.json","paper":"https://pith.science/paper/2CJPCQWC"},"agent_actions":{"view_html":"https://pith.science/pith/2CJPCQWC444PLWVIWTFQTHG6GB","download_json":"https://pith.science/pith/2CJPCQWC444PLWVIWTFQTHG6GB.json","view_paper":"https://pith.science/paper/2CJPCQWC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2506.01043&json=true","fetch_graph":"https://pith.science/api/pith-number/2CJPCQWC444PLWVIWTFQTHG6GB/graph.json","fetch_events":"https://pith.science/api/pith-number/2CJPCQWC444PLWVIWTFQTHG6GB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2CJPCQWC444PLWVIWTFQTHG6GB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2CJPCQWC444PLWVIWTFQTHG6GB/action/storage_attestation","attest_author":"https://pith.science/pith/2CJPCQWC444PLWVIWTFQTHG6GB/action/author_attestation","sign_citation":"https://pith.science/pith/2CJPCQWC444PLWVIWTFQTHG6GB/action/citation_signature","submit_replication":"https://pith.science/pith/2CJPCQWC444PLWVIWTFQTHG6GB/action/replication_record"}},"created_at":"2026-07-05T11:13:45.014891+00:00","updated_at":"2026-07-05T11:13:45.014891+00:00"}