{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:2SKKY4FHQYIVXCHBJ5JCUNUQ5W","short_pith_number":"pith:2SKKY4FH","schema_version":"1.0","canonical_sha256":"d494ac70a786115b88e14f522a3690eda722d4f0a1fd01e8b78ccd54c4a9d994","source":{"kind":"arxiv","id":"1905.03903","version":1},"attestation_state":"computed","paper":{"title":"Channel Tracking and Hybrid Precoding for Wideband Hybrid Millimeter Wave MIMO Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Javier Rodriguez-Fernandez, Nuria Gonzalez-Prelcic, Takayuki Shimizu","submitted_at":"2019-05-10T00:52:02Z","abstract_excerpt":"A major source of difficulty when operating with large arrays at mmWave frequencies is to estimate the wideband channel, since the use of hybrid architectures acts as a compression stage for the received signal. Moreover, the channel has to be tracked and the antenna arrays regularly reconfigured to obtain appropriate beamforming gains when a mobile setting is considered. In this paper, we focus on the problem of channel tracking for frequency-selective mmWave channels, and propose two novel channel tracking algorithms that leverage prior statistical information on the angles-of-arrival and an"},"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":"1905.03903","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-05-10T00:52:02Z","cross_cats_sorted":[],"title_canon_sha256":"e05e2455db350144014147879204710fa53233fdd65d3bf362356f96b3c4225c","abstract_canon_sha256":"f577765496678d21ddc2cf8815e03c36cbd9a50aaa4fefa8bf5fa6557556f8da"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:35.231120Z","signature_b64":"gw+Be9SdIwBAhtHxqC7i8SJOxrtda7pqCw5NhiRGWyAX65z7vAJOHoyiGHijz5XlZeuPBrkJqz+NQC/z9LJbCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d494ac70a786115b88e14f522a3690eda722d4f0a1fd01e8b78ccd54c4a9d994","last_reissued_at":"2026-05-17T23:46:35.230499Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:35.230499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Channel Tracking and Hybrid Precoding for Wideband Hybrid Millimeter Wave MIMO Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Javier Rodriguez-Fernandez, Nuria Gonzalez-Prelcic, Takayuki Shimizu","submitted_at":"2019-05-10T00:52:02Z","abstract_excerpt":"A major source of difficulty when operating with large arrays at mmWave frequencies is to estimate the wideband channel, since the use of hybrid architectures acts as a compression stage for the received signal. Moreover, the channel has to be tracked and the antenna arrays regularly reconfigured to obtain appropriate beamforming gains when a mobile setting is considered. In this paper, we focus on the problem of channel tracking for frequency-selective mmWave channels, and propose two novel channel tracking algorithms that leverage prior statistical information on the angles-of-arrival and an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.03903","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":"1905.03903","created_at":"2026-05-17T23:46:35.230601+00:00"},{"alias_kind":"arxiv_version","alias_value":"1905.03903v1","created_at":"2026-05-17T23:46:35.230601+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.03903","created_at":"2026-05-17T23:46:35.230601+00:00"},{"alias_kind":"pith_short_12","alias_value":"2SKKY4FHQYIV","created_at":"2026-05-18T12:33:07.085635+00:00"},{"alias_kind":"pith_short_16","alias_value":"2SKKY4FHQYIVXCHB","created_at":"2026-05-18T12:33:07.085635+00:00"},{"alias_kind":"pith_short_8","alias_value":"2SKKY4FH","created_at":"2026-05-18T12:33:07.085635+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/2SKKY4FHQYIVXCHBJ5JCUNUQ5W","json":"https://pith.science/pith/2SKKY4FHQYIVXCHBJ5JCUNUQ5W.json","graph_json":"https://pith.science/api/pith-number/2SKKY4FHQYIVXCHBJ5JCUNUQ5W/graph.json","events_json":"https://pith.science/api/pith-number/2SKKY4FHQYIVXCHBJ5JCUNUQ5W/events.json","paper":"https://pith.science/paper/2SKKY4FH"},"agent_actions":{"view_html":"https://pith.science/pith/2SKKY4FHQYIVXCHBJ5JCUNUQ5W","download_json":"https://pith.science/pith/2SKKY4FHQYIVXCHBJ5JCUNUQ5W.json","view_paper":"https://pith.science/paper/2SKKY4FH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1905.03903&json=true","fetch_graph":"https://pith.science/api/pith-number/2SKKY4FHQYIVXCHBJ5JCUNUQ5W/graph.json","fetch_events":"https://pith.science/api/pith-number/2SKKY4FHQYIVXCHBJ5JCUNUQ5W/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2SKKY4FHQYIVXCHBJ5JCUNUQ5W/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2SKKY4FHQYIVXCHBJ5JCUNUQ5W/action/storage_attestation","attest_author":"https://pith.science/pith/2SKKY4FHQYIVXCHBJ5JCUNUQ5W/action/author_attestation","sign_citation":"https://pith.science/pith/2SKKY4FHQYIVXCHBJ5JCUNUQ5W/action/citation_signature","submit_replication":"https://pith.science/pith/2SKKY4FHQYIVXCHBJ5JCUNUQ5W/action/replication_record"}},"created_at":"2026-05-17T23:46:35.230601+00:00","updated_at":"2026-05-17T23:46:35.230601+00:00"}