{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ETBAYR6KQ2S7HXJ5BXOKDGQIZ3","short_pith_number":"pith:ETBAYR6K","canonical_record":{"source":{"id":"1912.09315","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-12-19T15:55:10Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"cb4fe30d9a283606d8b95498f92998abfabca420518502de679499c91bd173a5","abstract_canon_sha256":"d8de92ab5ae7309a1433a8a0da7dc0d5d048d5b1331a418829f0a27164080ac9"},"schema_version":"1.0"},"canonical_sha256":"24c20c47ca86a5f3dd3d0ddca19a08cec03ed147729984f37617d3566cfd270d","source":{"kind":"arxiv","id":"1912.09315","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.09315","created_at":"2026-07-05T01:44:46Z"},{"alias_kind":"arxiv_version","alias_value":"1912.09315v3","created_at":"2026-07-05T01:44:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.09315","created_at":"2026-07-05T01:44:46Z"},{"alias_kind":"pith_short_12","alias_value":"ETBAYR6KQ2S7","created_at":"2026-07-05T01:44:46Z"},{"alias_kind":"pith_short_16","alias_value":"ETBAYR6KQ2S7HXJ5","created_at":"2026-07-05T01:44:46Z"},{"alias_kind":"pith_short_8","alias_value":"ETBAYR6K","created_at":"2026-07-05T01:44:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ETBAYR6KQ2S7HXJ5BXOKDGQIZ3","target":"record","payload":{"canonical_record":{"source":{"id":"1912.09315","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-12-19T15:55:10Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"cb4fe30d9a283606d8b95498f92998abfabca420518502de679499c91bd173a5","abstract_canon_sha256":"d8de92ab5ae7309a1433a8a0da7dc0d5d048d5b1331a418829f0a27164080ac9"},"schema_version":"1.0"},"canonical_sha256":"24c20c47ca86a5f3dd3d0ddca19a08cec03ed147729984f37617d3566cfd270d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:44:46.000561Z","signature_b64":"Hd8EB/kiYpER11mKO8YobCj/qFE4wsjmyb2ZY1bOA8OKhK907H1r3NWWWP3IA2X47nR48IEOZ9PZYO50KNgOCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24c20c47ca86a5f3dd3d0ddca19a08cec03ed147729984f37617d3566cfd270d","last_reissued_at":"2026-07-05T01:44:46.000110Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:44:46.000110Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1912.09315","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:44:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hH+6w4ytlGVW8VAPYExCUrirysg3u+G3m+saWj7QC/Pdnr3PhBT5LyC1IuBdczQ2rnpj8L53p2qJgWbswQ8zBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T22:34:01.209969Z"},"content_sha256":"db94a288e8dc31b90d29dd5b6bd48c1186da3468138b7a32b1340d2af8bb7ab8","schema_version":"1.0","event_id":"sha256:db94a288e8dc31b90d29dd5b6bd48c1186da3468138b7a32b1340d2af8bb7ab8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ETBAYR6KQ2S7HXJ5BXOKDGQIZ3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sum Rate Maximization for Multiuser MISO Downlink with Intelligent Reflecting Surface","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IT","math.IT"],"primary_cat":"eess.SP","authors_text":"Jingran Lin, Qiang Li, Silei Wang, Sissi Xiaoxiao Wu","submitted_at":"2019-12-19T15:55:10Z","abstract_excerpt":"The intelligent reflecting surface (IRS) is a planar array with massive reconfigurable passive elements, which can align the reflecting signals at the receivers via controlling the phase shifts at each element independently. Since IRS can be implemented without RF chain, it is seen as a cost-effective solution for boosting the spectral efficiency for the future communication system. This work considers the IRS-aided multiuser multi-input single-output downlink transmission, and our goal is to maximize the sum rate by jointly optimizing the transmit beamformer at the base station and the phase "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.09315","kind":"arxiv","version":3},"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/1912.09315/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:44:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EfX2EQmQejDhJ7EdjyC4lJ3nytZsub9ODfpdW5yn1CcJrfRHu3FtRgQEI826Tpo1hkCNU3KNFm3TYvpitTBdBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T22:34:01.210507Z"},"content_sha256":"81d6d6dbf99b8c3163eb1bfc462e8274a2490211de85aade2b1b3767910cf591","schema_version":"1.0","event_id":"sha256:81d6d6dbf99b8c3163eb1bfc462e8274a2490211de85aade2b1b3767910cf591"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ETBAYR6KQ2S7HXJ5BXOKDGQIZ3/bundle.json","state_url":"https://pith.science/pith/ETBAYR6KQ2S7HXJ5BXOKDGQIZ3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ETBAYR6KQ2S7HXJ5BXOKDGQIZ3/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-17T22:34:01Z","links":{"resolver":"https://pith.science/pith/ETBAYR6KQ2S7HXJ5BXOKDGQIZ3","bundle":"https://pith.science/pith/ETBAYR6KQ2S7HXJ5BXOKDGQIZ3/bundle.json","state":"https://pith.science/pith/ETBAYR6KQ2S7HXJ5BXOKDGQIZ3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ETBAYR6KQ2S7HXJ5BXOKDGQIZ3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ETBAYR6KQ2S7HXJ5BXOKDGQIZ3","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"d8de92ab5ae7309a1433a8a0da7dc0d5d048d5b1331a418829f0a27164080ac9","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-12-19T15:55:10Z","title_canon_sha256":"cb4fe30d9a283606d8b95498f92998abfabca420518502de679499c91bd173a5"},"schema_version":"1.0","source":{"id":"1912.09315","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.09315","created_at":"2026-07-05T01:44:46Z"},{"alias_kind":"arxiv_version","alias_value":"1912.09315v3","created_at":"2026-07-05T01:44:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.09315","created_at":"2026-07-05T01:44:46Z"},{"alias_kind":"pith_short_12","alias_value":"ETBAYR6KQ2S7","created_at":"2026-07-05T01:44:46Z"},{"alias_kind":"pith_short_16","alias_value":"ETBAYR6KQ2S7HXJ5","created_at":"2026-07-05T01:44:46Z"},{"alias_kind":"pith_short_8","alias_value":"ETBAYR6K","created_at":"2026-07-05T01:44:46Z"}],"graph_snapshots":[{"event_id":"sha256:81d6d6dbf99b8c3163eb1bfc462e8274a2490211de85aade2b1b3767910cf591","target":"graph","created_at":"2026-07-05T01:44:46Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1912.09315/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The intelligent reflecting surface (IRS) is a planar array with massive reconfigurable passive elements, which can align the reflecting signals at the receivers via controlling the phase shifts at each element independently. Since IRS can be implemented without RF chain, it is seen as a cost-effective solution for boosting the spectral efficiency for the future communication system. This work considers the IRS-aided multiuser multi-input single-output downlink transmission, and our goal is to maximize the sum rate by jointly optimizing the transmit beamformer at the base station and the phase ","authors_text":"Jingran Lin, Qiang Li, Silei Wang, Sissi Xiaoxiao Wu","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-12-19T15:55:10Z","title":"Sum Rate Maximization for Multiuser MISO Downlink with Intelligent Reflecting Surface"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.09315","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:db94a288e8dc31b90d29dd5b6bd48c1186da3468138b7a32b1340d2af8bb7ab8","target":"record","created_at":"2026-07-05T01:44:46Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"d8de92ab5ae7309a1433a8a0da7dc0d5d048d5b1331a418829f0a27164080ac9","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-12-19T15:55:10Z","title_canon_sha256":"cb4fe30d9a283606d8b95498f92998abfabca420518502de679499c91bd173a5"},"schema_version":"1.0","source":{"id":"1912.09315","kind":"arxiv","version":3}},"canonical_sha256":"24c20c47ca86a5f3dd3d0ddca19a08cec03ed147729984f37617d3566cfd270d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24c20c47ca86a5f3dd3d0ddca19a08cec03ed147729984f37617d3566cfd270d","first_computed_at":"2026-07-05T01:44:46.000110Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:44:46.000110Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hd8EB/kiYpER11mKO8YobCj/qFE4wsjmyb2ZY1bOA8OKhK907H1r3NWWWP3IA2X47nR48IEOZ9PZYO50KNgOCg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:44:46.000561Z","signed_message":"canonical_sha256_bytes"},"source_id":"1912.09315","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:db94a288e8dc31b90d29dd5b6bd48c1186da3468138b7a32b1340d2af8bb7ab8","sha256:81d6d6dbf99b8c3163eb1bfc462e8274a2490211de85aade2b1b3767910cf591"],"state_sha256":"2fc681e2253356af8138e1a98d77ee31844c034448305117ddd78991d4d3eb9b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BreCA6m6Tyi7ZNABM4EV6zpPyw5QhWNPnnGzN2RYyS9+SxttG6PQNGeqvidCAdbrAYw6blRu+vR8VnKzhrhmBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T22:34:01.216472Z","bundle_sha256":"c5a1744453272a906e2f9bd5582a5c988d3668ea50bc9238425242e5192a357d"}}