{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:EEBR6BI3ROVJDLUQ6BF7U3BTVS","short_pith_number":"pith:EEBR6BI3","schema_version":"1.0","canonical_sha256":"21031f051b8baa91ae90f04bfa6c33aca4b0dab00800ae4c3244894d05d10934","source":{"kind":"arxiv","id":"2203.01630","version":2},"attestation_state":"computed","paper":{"title":"Optimization-based Phase-shift Codebook Design for Large IRSs","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["eess.SP","math.IT"],"primary_cat":"cs.IT","authors_text":"Hanwen Cao, Joseph Eichinger, Malte Schellmann, Robert Schober, Vahid Jamali, Walid R. Ghanem","submitted_at":"2022-03-03T10:45:05Z","abstract_excerpt":"In this paper, we focus on large intelligent reflecting surfaces (IRSs) and propose a new codebook construction method to obtain a set of pre-designed phase-shift configurations for the IRS unit cells. Since the complexity of online optimization and the overhead for channel estimation scale with the size of the phase-shift codebook, the design of small codebooks is of high importance. We consider both continuous and discrete phase-shift designs and formulate the codebook construction as optimization problems. To solve the optimization problems, we propose an optimal algorithm for the discrete "},"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":"2203.01630","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IT","submitted_at":"2022-03-03T10:45:05Z","cross_cats_sorted":["eess.SP","math.IT"],"title_canon_sha256":"c12e3996a0ba0878235278e59c0c7f5efeff3d01d84e8871712697f899d331c6","abstract_canon_sha256":"20e04c49e8c990aef639f052ac98f6b2c91cd3d89f41d1de6cf6d2aecd3f3980"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:46:35.516867Z","signature_b64":"9Wgr0dsEGYuvnKKFlH0OiLrhbDaLO5dMPStk1chbIi1816ili/R/9gRCUmn/XvoT4b/ygYRKS5bEZGp9vvqDDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"21031f051b8baa91ae90f04bfa6c33aca4b0dab00800ae4c3244894d05d10934","last_reissued_at":"2026-07-05T04:46:35.516434Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:46:35.516434Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Optimization-based Phase-shift Codebook Design for Large IRSs","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["eess.SP","math.IT"],"primary_cat":"cs.IT","authors_text":"Hanwen Cao, Joseph Eichinger, Malte Schellmann, Robert Schober, Vahid Jamali, Walid R. Ghanem","submitted_at":"2022-03-03T10:45:05Z","abstract_excerpt":"In this paper, we focus on large intelligent reflecting surfaces (IRSs) and propose a new codebook construction method to obtain a set of pre-designed phase-shift configurations for the IRS unit cells. Since the complexity of online optimization and the overhead for channel estimation scale with the size of the phase-shift codebook, the design of small codebooks is of high importance. We consider both continuous and discrete phase-shift designs and formulate the codebook construction as optimization problems. To solve the optimization problems, we propose an optimal algorithm for the discrete "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.01630","kind":"arxiv","version":2},"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/2203.01630/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":"2203.01630","created_at":"2026-07-05T04:46:35.516491+00:00"},{"alias_kind":"arxiv_version","alias_value":"2203.01630v2","created_at":"2026-07-05T04:46:35.516491+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.01630","created_at":"2026-07-05T04:46:35.516491+00:00"},{"alias_kind":"pith_short_12","alias_value":"EEBR6BI3ROVJ","created_at":"2026-07-05T04:46:35.516491+00:00"},{"alias_kind":"pith_short_16","alias_value":"EEBR6BI3ROVJDLUQ","created_at":"2026-07-05T04:46:35.516491+00:00"},{"alias_kind":"pith_short_8","alias_value":"EEBR6BI3","created_at":"2026-07-05T04:46:35.516491+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/EEBR6BI3ROVJDLUQ6BF7U3BTVS","json":"https://pith.science/pith/EEBR6BI3ROVJDLUQ6BF7U3BTVS.json","graph_json":"https://pith.science/api/pith-number/EEBR6BI3ROVJDLUQ6BF7U3BTVS/graph.json","events_json":"https://pith.science/api/pith-number/EEBR6BI3ROVJDLUQ6BF7U3BTVS/events.json","paper":"https://pith.science/paper/EEBR6BI3"},"agent_actions":{"view_html":"https://pith.science/pith/EEBR6BI3ROVJDLUQ6BF7U3BTVS","download_json":"https://pith.science/pith/EEBR6BI3ROVJDLUQ6BF7U3BTVS.json","view_paper":"https://pith.science/paper/EEBR6BI3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2203.01630&json=true","fetch_graph":"https://pith.science/api/pith-number/EEBR6BI3ROVJDLUQ6BF7U3BTVS/graph.json","fetch_events":"https://pith.science/api/pith-number/EEBR6BI3ROVJDLUQ6BF7U3BTVS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EEBR6BI3ROVJDLUQ6BF7U3BTVS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EEBR6BI3ROVJDLUQ6BF7U3BTVS/action/storage_attestation","attest_author":"https://pith.science/pith/EEBR6BI3ROVJDLUQ6BF7U3BTVS/action/author_attestation","sign_citation":"https://pith.science/pith/EEBR6BI3ROVJDLUQ6BF7U3BTVS/action/citation_signature","submit_replication":"https://pith.science/pith/EEBR6BI3ROVJDLUQ6BF7U3BTVS/action/replication_record"}},"created_at":"2026-07-05T04:46:35.516491+00:00","updated_at":"2026-07-05T04:46:35.516491+00:00"}