{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:QSCWC5RWRFQK5JI2IQCZU425J4","short_pith_number":"pith:QSCWC5RW","schema_version":"1.0","canonical_sha256":"84856176368960aea51a44059a735d4f2592d1837d640f1e690f0fcd0adde04b","source":{"kind":"arxiv","id":"1912.00040","version":1},"attestation_state":"computed","paper":{"title":"Hybrid Precoding Design for Reconfigurable Intelligent Surface aided mmWave Communication Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP"],"primary_cat":"cs.NI","authors_text":"Ang Li, Branka Vucetic, Chandan Pradhan, Lingyang Song, Yonghui Li","submitted_at":"2019-11-29T19:13:35Z","abstract_excerpt":"In this letter, we focus on the hybrid precoding (HP) design for the reconfigurable intelligent surface (RIS) aided multi-user (MU) millimeter wave (mmWave) communication systems. Specifically, we aim to minimize the mean-squared-error (MSE) between the received symbols and the transmitted symbols by jointly optimizing the analog-digital HP at the base-station (BS) and the phase shifts (PSs) at the RIS, where the non-convex element-wise constant-modulus constraints for the analog precoding and the PSs are tackled by resorting to the gradient-projection (GP) method. We analytically prove the co"},"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":"1912.00040","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2019-11-29T19:13:35Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"b6d6c18cd5d60580751ed12ff6ea797a73445670c8f73920deb221aebf3a0980","abstract_canon_sha256":"3d547ade97fae268fb693126081f18b349063c95b81723e0a96814d1dabd5c90"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:22:54.482155Z","signature_b64":"Dg2ZTCE7GBsv8r/E/TqlV7RxZHjfQhBxJAQQRNu9KtRddah/Ltx/nZcbzXvzSejfWxdaccTvPbKkGmwT3Yw6AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84856176368960aea51a44059a735d4f2592d1837d640f1e690f0fcd0adde04b","last_reissued_at":"2026-07-05T00:22:54.481745Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:22:54.481745Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Hybrid Precoding Design for Reconfigurable Intelligent Surface aided mmWave Communication Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP"],"primary_cat":"cs.NI","authors_text":"Ang Li, Branka Vucetic, Chandan Pradhan, Lingyang Song, Yonghui Li","submitted_at":"2019-11-29T19:13:35Z","abstract_excerpt":"In this letter, we focus on the hybrid precoding (HP) design for the reconfigurable intelligent surface (RIS) aided multi-user (MU) millimeter wave (mmWave) communication systems. Specifically, we aim to minimize the mean-squared-error (MSE) between the received symbols and the transmitted symbols by jointly optimizing the analog-digital HP at the base-station (BS) and the phase shifts (PSs) at the RIS, where the non-convex element-wise constant-modulus constraints for the analog precoding and the PSs are tackled by resorting to the gradient-projection (GP) method. We analytically prove the co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.00040","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/1912.00040/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":"1912.00040","created_at":"2026-07-05T00:22:54.481800+00:00"},{"alias_kind":"arxiv_version","alias_value":"1912.00040v1","created_at":"2026-07-05T00:22:54.481800+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.00040","created_at":"2026-07-05T00:22:54.481800+00:00"},{"alias_kind":"pith_short_12","alias_value":"QSCWC5RWRFQK","created_at":"2026-07-05T00:22:54.481800+00:00"},{"alias_kind":"pith_short_16","alias_value":"QSCWC5RWRFQK5JI2","created_at":"2026-07-05T00:22:54.481800+00:00"},{"alias_kind":"pith_short_8","alias_value":"QSCWC5RW","created_at":"2026-07-05T00:22:54.481800+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/QSCWC5RWRFQK5JI2IQCZU425J4","json":"https://pith.science/pith/QSCWC5RWRFQK5JI2IQCZU425J4.json","graph_json":"https://pith.science/api/pith-number/QSCWC5RWRFQK5JI2IQCZU425J4/graph.json","events_json":"https://pith.science/api/pith-number/QSCWC5RWRFQK5JI2IQCZU425J4/events.json","paper":"https://pith.science/paper/QSCWC5RW"},"agent_actions":{"view_html":"https://pith.science/pith/QSCWC5RWRFQK5JI2IQCZU425J4","download_json":"https://pith.science/pith/QSCWC5RWRFQK5JI2IQCZU425J4.json","view_paper":"https://pith.science/paper/QSCWC5RW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1912.00040&json=true","fetch_graph":"https://pith.science/api/pith-number/QSCWC5RWRFQK5JI2IQCZU425J4/graph.json","fetch_events":"https://pith.science/api/pith-number/QSCWC5RWRFQK5JI2IQCZU425J4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QSCWC5RWRFQK5JI2IQCZU425J4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QSCWC5RWRFQK5JI2IQCZU425J4/action/storage_attestation","attest_author":"https://pith.science/pith/QSCWC5RWRFQK5JI2IQCZU425J4/action/author_attestation","sign_citation":"https://pith.science/pith/QSCWC5RWRFQK5JI2IQCZU425J4/action/citation_signature","submit_replication":"https://pith.science/pith/QSCWC5RWRFQK5JI2IQCZU425J4/action/replication_record"}},"created_at":"2026-07-05T00:22:54.481800+00:00","updated_at":"2026-07-05T00:22:54.481800+00:00"}