{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:LC5TU774TORGVRMW43QWLEOFG3","short_pith_number":"pith:LC5TU774","canonical_record":{"source":{"id":"2302.11997","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-02-23T13:18:55Z","cross_cats_sorted":[],"title_canon_sha256":"b9d7ad298e3de2a4c3f87b95d19683b85059871af58e1959b1d728f66d4534cd","abstract_canon_sha256":"fda3f682e83ea6e64750fd574e03e92332b18cae7cb280b20faaeb5628aec57e"},"schema_version":"1.0"},"canonical_sha256":"58bb3a7ffc9ba26ac596e6e16591c536d6d08fe76c4ca303d419a45a46876d5c","source":{"kind":"arxiv","id":"2302.11997","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.11997","created_at":"2026-07-05T11:13:53Z"},{"alias_kind":"arxiv_version","alias_value":"2302.11997v2","created_at":"2026-07-05T11:13:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.11997","created_at":"2026-07-05T11:13:53Z"},{"alias_kind":"pith_short_12","alias_value":"LC5TU774TORG","created_at":"2026-07-05T11:13:53Z"},{"alias_kind":"pith_short_16","alias_value":"LC5TU774TORGVRMW","created_at":"2026-07-05T11:13:53Z"},{"alias_kind":"pith_short_8","alias_value":"LC5TU774","created_at":"2026-07-05T11:13:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:LC5TU774TORGVRMW43QWLEOFG3","target":"record","payload":{"canonical_record":{"source":{"id":"2302.11997","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-02-23T13:18:55Z","cross_cats_sorted":[],"title_canon_sha256":"b9d7ad298e3de2a4c3f87b95d19683b85059871af58e1959b1d728f66d4534cd","abstract_canon_sha256":"fda3f682e83ea6e64750fd574e03e92332b18cae7cb280b20faaeb5628aec57e"},"schema_version":"1.0"},"canonical_sha256":"58bb3a7ffc9ba26ac596e6e16591c536d6d08fe76c4ca303d419a45a46876d5c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:13:53.693526Z","signature_b64":"exdopP9+JALiVPt5/zVOYtGEwo79l611Nxd+5E+w4XOAYJlD0SerNEr+DI//gxtPlXcVLm4KaMkUEsmbBwLiBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"58bb3a7ffc9ba26ac596e6e16591c536d6d08fe76c4ca303d419a45a46876d5c","last_reissued_at":"2026-07-05T11:13:53.693050Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:13:53.693050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2302.11997","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:13:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xl0ize4j/tfiC0OOI8bH1kd5vyHLqQK/XM0PQtPpfJOh+2RSwV6pqbAqv5b2xXKAGp8pXIb7NV9H/ha36/HiBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T00:26:06.468049Z"},"content_sha256":"21e3c7e1543c6101545139435281ae295e7153a1984da862ecd17468da5c07b6","schema_version":"1.0","event_id":"sha256:21e3c7e1543c6101545139435281ae295e7153a1984da862ecd17468da5c07b6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:LC5TU774TORGVRMW43QWLEOFG3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Beamforming Design with Partial Channel Estimation and Feedback for FDD RIS-Assisted Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Byonghyo Shim, Chengwen Xing, Shanping Yu, Wenqian Shen, Xiaochun Ge","submitted_at":"2023-02-23T13:18:55Z","abstract_excerpt":"Beamforming design with partial channel estimation and feedback for frequency-division duplexing (FDD) reconfigurable intelligent surface (RIS) assisted systems is considered in this paper. We leverage the observation that path angle information (PAI) varies more slowly than path gain information (PGI). Then, several dominant paths are selected among all the cascaded paths according to the known PAI for maximizing the spectral efficiency of downlink data transmission. To acquire the dominating path gain information (DPGI, also regarded as the path gains of selected dominant paths) at the base "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.11997","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/2302.11997/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":"2026-07-05T11:13:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9IpM1St+/4GxsPlxEm5dPFuYzUWEFSwkHkwIYO0zk1KyxtnHERm5VhGqo0TJIga0TXxV37egq7uMihHcF29ZBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T00:26:06.468452Z"},"content_sha256":"333417b4df64436596a1a4e6ef2dabadc9c569a6d75e21b37ea54b339af2ce89","schema_version":"1.0","event_id":"sha256:333417b4df64436596a1a4e6ef2dabadc9c569a6d75e21b37ea54b339af2ce89"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LC5TU774TORGVRMW43QWLEOFG3/bundle.json","state_url":"https://pith.science/pith/LC5TU774TORGVRMW43QWLEOFG3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LC5TU774TORGVRMW43QWLEOFG3/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":"2026-07-09T00:26:06Z","links":{"resolver":"https://pith.science/pith/LC5TU774TORGVRMW43QWLEOFG3","bundle":"https://pith.science/pith/LC5TU774TORGVRMW43QWLEOFG3/bundle.json","state":"https://pith.science/pith/LC5TU774TORGVRMW43QWLEOFG3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LC5TU774TORGVRMW43QWLEOFG3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:LC5TU774TORGVRMW43QWLEOFG3","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":"fda3f682e83ea6e64750fd574e03e92332b18cae7cb280b20faaeb5628aec57e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-02-23T13:18:55Z","title_canon_sha256":"b9d7ad298e3de2a4c3f87b95d19683b85059871af58e1959b1d728f66d4534cd"},"schema_version":"1.0","source":{"id":"2302.11997","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.11997","created_at":"2026-07-05T11:13:53Z"},{"alias_kind":"arxiv_version","alias_value":"2302.11997v2","created_at":"2026-07-05T11:13:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.11997","created_at":"2026-07-05T11:13:53Z"},{"alias_kind":"pith_short_12","alias_value":"LC5TU774TORG","created_at":"2026-07-05T11:13:53Z"},{"alias_kind":"pith_short_16","alias_value":"LC5TU774TORGVRMW","created_at":"2026-07-05T11:13:53Z"},{"alias_kind":"pith_short_8","alias_value":"LC5TU774","created_at":"2026-07-05T11:13:53Z"}],"graph_snapshots":[{"event_id":"sha256:333417b4df64436596a1a4e6ef2dabadc9c569a6d75e21b37ea54b339af2ce89","target":"graph","created_at":"2026-07-05T11:13:53Z","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/2302.11997/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Beamforming design with partial channel estimation and feedback for frequency-division duplexing (FDD) reconfigurable intelligent surface (RIS) assisted systems is considered in this paper. We leverage the observation that path angle information (PAI) varies more slowly than path gain information (PGI). Then, several dominant paths are selected among all the cascaded paths according to the known PAI for maximizing the spectral efficiency of downlink data transmission. To acquire the dominating path gain information (DPGI, also regarded as the path gains of selected dominant paths) at the base ","authors_text":"Byonghyo Shim, Chengwen Xing, Shanping Yu, Wenqian Shen, Xiaochun Ge","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-02-23T13:18:55Z","title":"Beamforming Design with Partial Channel Estimation and Feedback for FDD RIS-Assisted Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.11997","kind":"arxiv","version":2},"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":"sha256:21e3c7e1543c6101545139435281ae295e7153a1984da862ecd17468da5c07b6","target":"record","created_at":"2026-07-05T11:13:53Z","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":"fda3f682e83ea6e64750fd574e03e92332b18cae7cb280b20faaeb5628aec57e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-02-23T13:18:55Z","title_canon_sha256":"b9d7ad298e3de2a4c3f87b95d19683b85059871af58e1959b1d728f66d4534cd"},"schema_version":"1.0","source":{"id":"2302.11997","kind":"arxiv","version":2}},"canonical_sha256":"58bb3a7ffc9ba26ac596e6e16591c536d6d08fe76c4ca303d419a45a46876d5c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"58bb3a7ffc9ba26ac596e6e16591c536d6d08fe76c4ca303d419a45a46876d5c","first_computed_at":"2026-07-05T11:13:53.693050Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:13:53.693050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"exdopP9+JALiVPt5/zVOYtGEwo79l611Nxd+5E+w4XOAYJlD0SerNEr+DI//gxtPlXcVLm4KaMkUEsmbBwLiBA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:13:53.693526Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.11997","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:21e3c7e1543c6101545139435281ae295e7153a1984da862ecd17468da5c07b6","sha256:333417b4df64436596a1a4e6ef2dabadc9c569a6d75e21b37ea54b339af2ce89"],"state_sha256":"be12deaad70fc032f65c5886bddb63db06f02eccf3f8ec911e37017669d0abbf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aKYan3fI6vLLWYlou30uBC/FGJk/W+ORASeB+cHsk7n5XOUuzJ0l1L1eOwA21iscZO6yKOXtOLblYAiOdU9VCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T00:26:06.470520Z","bundle_sha256":"034fd4e70e4225a1022784b4431c1ab41803cae41631528c14e88a75cc276c77"}}