{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:2S5TXESPFIA3KVPSDREQCSJPE4","short_pith_number":"pith:2S5TXESP","schema_version":"1.0","canonical_sha256":"d4bb3b924f2a01b555f21c4901492f273ace595a5374673872fb9fe6a0a5c49f","source":{"kind":"arxiv","id":"1504.02374","version":1},"attestation_state":"computed","paper":{"title":"Uplink Performance of Conventional and Massive MIMO Cellular Systems with Delayed CSIT","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Anastasios K. Papazafeiropoulos, Hien Quoc Ngo, Tharm Ratnarajah","submitted_at":"2015-04-09T16:41:45Z","abstract_excerpt":"Massive multiple-input multiple-output (MIMO) networks, where the base stations (BSs) are equipped with large number of antennas and serve a number of users simultaneously, are very promising, but suffer from pilot contamination. Despite its importance, delayed channel state information (CSI) due to user mobility, being another degrading factor, lacks investigation in the literature. Hence, we consider an uplink model, where each BS applies zero-forcing decoder, accounting for both effects, but with the focal point on the relative users' movement with regard to the BS antennas. In this setting"},"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":"1504.02374","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-04-09T16:41:45Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"02d1550d0c905c436b038522ecae90a521c5cd368073fef54d85c85b836fedd3","abstract_canon_sha256":"6674c6300d2ca84a6d33c507222a60b244798f213ea641bb74bad159c47f094b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:19:09.031002Z","signature_b64":"tZzPx9fuKx/UsVKfZSRHL/Jb9BGGiiEItLJHdzDlu8dVUnSMysLj6BgNCFXmZ7n9hK6zyuEhqsQjhwcwt/sSAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d4bb3b924f2a01b555f21c4901492f273ace595a5374673872fb9fe6a0a5c49f","last_reissued_at":"2026-05-18T02:19:09.030296Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:19:09.030296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Uplink Performance of Conventional and Massive MIMO Cellular Systems with Delayed CSIT","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Anastasios K. Papazafeiropoulos, Hien Quoc Ngo, Tharm Ratnarajah","submitted_at":"2015-04-09T16:41:45Z","abstract_excerpt":"Massive multiple-input multiple-output (MIMO) networks, where the base stations (BSs) are equipped with large number of antennas and serve a number of users simultaneously, are very promising, but suffer from pilot contamination. Despite its importance, delayed channel state information (CSI) due to user mobility, being another degrading factor, lacks investigation in the literature. Hence, we consider an uplink model, where each BS applies zero-forcing decoder, accounting for both effects, but with the focal point on the relative users' movement with regard to the BS antennas. In this setting"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.02374","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":""},"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":"1504.02374","created_at":"2026-05-18T02:19:09.030421+00:00"},{"alias_kind":"arxiv_version","alias_value":"1504.02374v1","created_at":"2026-05-18T02:19:09.030421+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.02374","created_at":"2026-05-18T02:19:09.030421+00:00"},{"alias_kind":"pith_short_12","alias_value":"2S5TXESPFIA3","created_at":"2026-05-18T12:29:02.477457+00:00"},{"alias_kind":"pith_short_16","alias_value":"2S5TXESPFIA3KVPS","created_at":"2026-05-18T12:29:02.477457+00:00"},{"alias_kind":"pith_short_8","alias_value":"2S5TXESP","created_at":"2026-05-18T12:29:02.477457+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/2S5TXESPFIA3KVPSDREQCSJPE4","json":"https://pith.science/pith/2S5TXESPFIA3KVPSDREQCSJPE4.json","graph_json":"https://pith.science/api/pith-number/2S5TXESPFIA3KVPSDREQCSJPE4/graph.json","events_json":"https://pith.science/api/pith-number/2S5TXESPFIA3KVPSDREQCSJPE4/events.json","paper":"https://pith.science/paper/2S5TXESP"},"agent_actions":{"view_html":"https://pith.science/pith/2S5TXESPFIA3KVPSDREQCSJPE4","download_json":"https://pith.science/pith/2S5TXESPFIA3KVPSDREQCSJPE4.json","view_paper":"https://pith.science/paper/2S5TXESP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1504.02374&json=true","fetch_graph":"https://pith.science/api/pith-number/2S5TXESPFIA3KVPSDREQCSJPE4/graph.json","fetch_events":"https://pith.science/api/pith-number/2S5TXESPFIA3KVPSDREQCSJPE4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2S5TXESPFIA3KVPSDREQCSJPE4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2S5TXESPFIA3KVPSDREQCSJPE4/action/storage_attestation","attest_author":"https://pith.science/pith/2S5TXESPFIA3KVPSDREQCSJPE4/action/author_attestation","sign_citation":"https://pith.science/pith/2S5TXESPFIA3KVPSDREQCSJPE4/action/citation_signature","submit_replication":"https://pith.science/pith/2S5TXESPFIA3KVPSDREQCSJPE4/action/replication_record"}},"created_at":"2026-05-18T02:19:09.030421+00:00","updated_at":"2026-05-18T02:19:09.030421+00:00"}