{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:QGTASMGHFFBSSM3CFHTDFTKJIV","short_pith_number":"pith:QGTASMGH","canonical_record":{"source":{"id":"2001.07054","kind":"arxiv","version":5},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2020-01-20T10:56:08Z","cross_cats_sorted":[],"title_canon_sha256":"f5598a282985ddb808281a0c0d0660bb07066fe83354198f95f611234dabfbe6","abstract_canon_sha256":"c2c623430b0943be21eacaa9422ecfdd05a7e5cf39e269c43146bfb708fff27f"},"schema_version":"1.0"},"canonical_sha256":"81a60930c7294329336229e632cd4945681cbd402d972b4a032293767e08c9c8","source":{"kind":"arxiv","id":"2001.07054","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.07054","created_at":"2026-07-05T03:03:48Z"},{"alias_kind":"arxiv_version","alias_value":"2001.07054v5","created_at":"2026-07-05T03:03:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.07054","created_at":"2026-07-05T03:03:48Z"},{"alias_kind":"pith_short_12","alias_value":"QGTASMGHFFBS","created_at":"2026-07-05T03:03:48Z"},{"alias_kind":"pith_short_16","alias_value":"QGTASMGHFFBSSM3C","created_at":"2026-07-05T03:03:48Z"},{"alias_kind":"pith_short_8","alias_value":"QGTASMGH","created_at":"2026-07-05T03:03:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:QGTASMGHFFBSSM3CFHTDFTKJIV","target":"record","payload":{"canonical_record":{"source":{"id":"2001.07054","kind":"arxiv","version":5},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2020-01-20T10:56:08Z","cross_cats_sorted":[],"title_canon_sha256":"f5598a282985ddb808281a0c0d0660bb07066fe83354198f95f611234dabfbe6","abstract_canon_sha256":"c2c623430b0943be21eacaa9422ecfdd05a7e5cf39e269c43146bfb708fff27f"},"schema_version":"1.0"},"canonical_sha256":"81a60930c7294329336229e632cd4945681cbd402d972b4a032293767e08c9c8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:03:48.286135Z","signature_b64":"uI4bfhg5QtkdRThWOoOG31rZP3s1MvqHsQluUfthtSaxpljDIPC9jErqYChUATP49Tn0PhPCk5ccWysgWY4pBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"81a60930c7294329336229e632cd4945681cbd402d972b4a032293767e08c9c8","last_reissued_at":"2026-07-05T03:03:48.285772Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:03:48.285772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2001.07054","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:03:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bgK/3+lZPkiPzYSpGSVoVD9835xx7xCU25gFT9eYpJWhZLNZXZIqGREXeYCW10UjPgzC0i2EOoCUSHgfF08GDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-14T05:42:14.176125Z"},"content_sha256":"ffe6dbf64ae8fbceaf1165f09b9042dd00f4cde8cb2bd8fcb7b97214301fa076","schema_version":"1.0","event_id":"sha256:ffe6dbf64ae8fbceaf1165f09b9042dd00f4cde8cb2bd8fcb7b97214301fa076"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:QGTASMGHFFBSSM3CFHTDFTKJIV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Framework of Robust Transmission Design for IRS-aided MISO Communications with Imperfect Cascaded Channels","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Arumugam Nallanathan, Cunhua Pan, Gui Zhou, Hong Ren, Kezhi Wang","submitted_at":"2020-01-20T10:56:08Z","abstract_excerpt":"Intelligent reflection surface (IRS) has recently been recognized as a promising technique to enhance the performance of wireless systems due to its ability of reconfiguring the signal propagation environment. However, the perfect channel state information (CSI) is challenging to obtain at the base station (BS) due to the lack of radio frequency (RF) chains at the IRS. Since most of the existing channel estimation methods were developed to acquire the cascaded BS-IRS-user channels, this paper is the first work to study the robust beamforming based on the imperfect cascaded BS-IRS-user channels"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.07054","kind":"arxiv","version":5},"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/2001.07054/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":"2026-07-05T03:03:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3H2stfy3ToZ2/DhZCUfmj2znk5y1HYwXv6eL68wxgFtR6JSCNVmxCWfU1dJVrguBSs7Tprlm5mPbNVsNmtpsCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-14T05:42:14.176505Z"},"content_sha256":"f9971ac44bc5274c8b1701569e5d47da7266865e5dd973e16f64af736fd35185","schema_version":"1.0","event_id":"sha256:f9971ac44bc5274c8b1701569e5d47da7266865e5dd973e16f64af736fd35185"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QGTASMGHFFBSSM3CFHTDFTKJIV/bundle.json","state_url":"https://pith.science/pith/QGTASMGHFFBSSM3CFHTDFTKJIV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QGTASMGHFFBSSM3CFHTDFTKJIV/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":"2026-07-14T05:42:14Z","links":{"resolver":"https://pith.science/pith/QGTASMGHFFBSSM3CFHTDFTKJIV","bundle":"https://pith.science/pith/QGTASMGHFFBSSM3CFHTDFTKJIV/bundle.json","state":"https://pith.science/pith/QGTASMGHFFBSSM3CFHTDFTKJIV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QGTASMGHFFBSSM3CFHTDFTKJIV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:QGTASMGHFFBSSM3CFHTDFTKJIV","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":"c2c623430b0943be21eacaa9422ecfdd05a7e5cf39e269c43146bfb708fff27f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2020-01-20T10:56:08Z","title_canon_sha256":"f5598a282985ddb808281a0c0d0660bb07066fe83354198f95f611234dabfbe6"},"schema_version":"1.0","source":{"id":"2001.07054","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.07054","created_at":"2026-07-05T03:03:48Z"},{"alias_kind":"arxiv_version","alias_value":"2001.07054v5","created_at":"2026-07-05T03:03:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.07054","created_at":"2026-07-05T03:03:48Z"},{"alias_kind":"pith_short_12","alias_value":"QGTASMGHFFBS","created_at":"2026-07-05T03:03:48Z"},{"alias_kind":"pith_short_16","alias_value":"QGTASMGHFFBSSM3C","created_at":"2026-07-05T03:03:48Z"},{"alias_kind":"pith_short_8","alias_value":"QGTASMGH","created_at":"2026-07-05T03:03:48Z"}],"graph_snapshots":[{"event_id":"sha256:f9971ac44bc5274c8b1701569e5d47da7266865e5dd973e16f64af736fd35185","target":"graph","created_at":"2026-07-05T03:03:48Z","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/2001.07054/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Intelligent reflection surface (IRS) has recently been recognized as a promising technique to enhance the performance of wireless systems due to its ability of reconfiguring the signal propagation environment. However, the perfect channel state information (CSI) is challenging to obtain at the base station (BS) due to the lack of radio frequency (RF) chains at the IRS. Since most of the existing channel estimation methods were developed to acquire the cascaded BS-IRS-user channels, this paper is the first work to study the robust beamforming based on the imperfect cascaded BS-IRS-user channels","authors_text":"Arumugam Nallanathan, Cunhua Pan, Gui Zhou, Hong Ren, Kezhi Wang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2020-01-20T10:56:08Z","title":"A Framework of Robust Transmission Design for IRS-aided MISO Communications with Imperfect Cascaded Channels"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.07054","kind":"arxiv","version":5},"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:ffe6dbf64ae8fbceaf1165f09b9042dd00f4cde8cb2bd8fcb7b97214301fa076","target":"record","created_at":"2026-07-05T03:03:48Z","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":"c2c623430b0943be21eacaa9422ecfdd05a7e5cf39e269c43146bfb708fff27f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2020-01-20T10:56:08Z","title_canon_sha256":"f5598a282985ddb808281a0c0d0660bb07066fe83354198f95f611234dabfbe6"},"schema_version":"1.0","source":{"id":"2001.07054","kind":"arxiv","version":5}},"canonical_sha256":"81a60930c7294329336229e632cd4945681cbd402d972b4a032293767e08c9c8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"81a60930c7294329336229e632cd4945681cbd402d972b4a032293767e08c9c8","first_computed_at":"2026-07-05T03:03:48.285772Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:03:48.285772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uI4bfhg5QtkdRThWOoOG31rZP3s1MvqHsQluUfthtSaxpljDIPC9jErqYChUATP49Tn0PhPCk5ccWysgWY4pBw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:03:48.286135Z","signed_message":"canonical_sha256_bytes"},"source_id":"2001.07054","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ffe6dbf64ae8fbceaf1165f09b9042dd00f4cde8cb2bd8fcb7b97214301fa076","sha256:f9971ac44bc5274c8b1701569e5d47da7266865e5dd973e16f64af736fd35185"],"state_sha256":"8016b5de9f7e447b9477124a674efd9a960135f972c3e6c868d5f7fce4b7b669"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Kix/sXEaAsdLRparousUjr1w42eH9OTcZWQjnkcbs0FUu5aBRD3TOvbW0eft7m7pCpOVV4+CTOw+2NK4/6wAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-14T05:42:14.178685Z","bundle_sha256":"ec671dee4cde7e4ee69936d6af9d43d791d5c31b9be960e79212464943400b1e"}}