{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:6PMWGCVGUGRGSIDQVX5SAPUNEW","short_pith_number":"pith:6PMWGCVG","schema_version":"1.0","canonical_sha256":"f3d9630aa6a1a2692070adfb203e8d2587e7af7d350cf80f0706777afcab0c37","source":{"kind":"arxiv","id":"1607.00946","version":1},"attestation_state":"computed","paper":{"title":"Direct Localization for Massive MIMO","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Alexander M. Haimovich, Erik G. Larsson, Henk Wymeersch, Martial Coulon, Nil Garcia","submitted_at":"2016-07-04T16:10:04Z","abstract_excerpt":"Large-scale MIMO systems are well known for their advantages in communications, but they also have the potential for providing very accurate localization thanks to their high angular resolution. A difficult problem arising indoors and outdoors is localizing users over multipath channels. Localization based on angle of arrival (AOA) generally involves a two-step procedure, where signals are first processed to obtain a user's AOA at different base stations, followed by triangulation to determine the user's position. In the presence of multipath, the performance of these methods is greatly degrad"},"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":"1607.00946","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-07-04T16:10:04Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"eb188e6998329e676616cd53d066853f11f08ec91180512f70da8a06ce399fc0","abstract_canon_sha256":"3c8fea7e0fdaac73946ff9eb7f4b5cc174588af5508bf2a16f214393ea8b006e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:51:01.248220Z","signature_b64":"B7kvl8hGx3uzlkeJHU+TUh8q+qcl23jC1PuWGdTxVV+TfYOg7s1NbGzklNCda+Sem3M9Cgb9UtIjF1Mis+5ECQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3d9630aa6a1a2692070adfb203e8d2587e7af7d350cf80f0706777afcab0c37","last_reissued_at":"2026-05-18T00:51:01.247800Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:51:01.247800Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Direct Localization for Massive MIMO","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Alexander M. Haimovich, Erik G. Larsson, Henk Wymeersch, Martial Coulon, Nil Garcia","submitted_at":"2016-07-04T16:10:04Z","abstract_excerpt":"Large-scale MIMO systems are well known for their advantages in communications, but they also have the potential for providing very accurate localization thanks to their high angular resolution. A difficult problem arising indoors and outdoors is localizing users over multipath channels. Localization based on angle of arrival (AOA) generally involves a two-step procedure, where signals are first processed to obtain a user's AOA at different base stations, followed by triangulation to determine the user's position. In the presence of multipath, the performance of these methods is greatly degrad"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.00946","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":"1607.00946","created_at":"2026-05-18T00:51:01.247862+00:00"},{"alias_kind":"arxiv_version","alias_value":"1607.00946v1","created_at":"2026-05-18T00:51:01.247862+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.00946","created_at":"2026-05-18T00:51:01.247862+00:00"},{"alias_kind":"pith_short_12","alias_value":"6PMWGCVGUGRG","created_at":"2026-05-18T12:30:01.593930+00:00"},{"alias_kind":"pith_short_16","alias_value":"6PMWGCVGUGRGSIDQ","created_at":"2026-05-18T12:30:01.593930+00:00"},{"alias_kind":"pith_short_8","alias_value":"6PMWGCVG","created_at":"2026-05-18T12:30:01.593930+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/6PMWGCVGUGRGSIDQVX5SAPUNEW","json":"https://pith.science/pith/6PMWGCVGUGRGSIDQVX5SAPUNEW.json","graph_json":"https://pith.science/api/pith-number/6PMWGCVGUGRGSIDQVX5SAPUNEW/graph.json","events_json":"https://pith.science/api/pith-number/6PMWGCVGUGRGSIDQVX5SAPUNEW/events.json","paper":"https://pith.science/paper/6PMWGCVG"},"agent_actions":{"view_html":"https://pith.science/pith/6PMWGCVGUGRGSIDQVX5SAPUNEW","download_json":"https://pith.science/pith/6PMWGCVGUGRGSIDQVX5SAPUNEW.json","view_paper":"https://pith.science/paper/6PMWGCVG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1607.00946&json=true","fetch_graph":"https://pith.science/api/pith-number/6PMWGCVGUGRGSIDQVX5SAPUNEW/graph.json","fetch_events":"https://pith.science/api/pith-number/6PMWGCVGUGRGSIDQVX5SAPUNEW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6PMWGCVGUGRGSIDQVX5SAPUNEW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6PMWGCVGUGRGSIDQVX5SAPUNEW/action/storage_attestation","attest_author":"https://pith.science/pith/6PMWGCVGUGRGSIDQVX5SAPUNEW/action/author_attestation","sign_citation":"https://pith.science/pith/6PMWGCVGUGRGSIDQVX5SAPUNEW/action/citation_signature","submit_replication":"https://pith.science/pith/6PMWGCVGUGRGSIDQVX5SAPUNEW/action/replication_record"}},"created_at":"2026-05-18T00:51:01.247862+00:00","updated_at":"2026-05-18T00:51:01.247862+00:00"}