{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:XPGKQWNCMCWSU4ANP2VV6QEZUG","short_pith_number":"pith:XPGKQWNC","canonical_record":{"source":{"id":"2307.12126","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2023-07-22T17:07:26Z","cross_cats_sorted":["eess.SP","math.IT"],"title_canon_sha256":"908ca5fcae47a43ba0553a12348b333222282ab3d83cd92e84307195e2b0ca63","abstract_canon_sha256":"ba439df53e2b5de9fbeddc06773ae5859f011fd624422453fca843ca0fc12a94"},"schema_version":"1.0"},"canonical_sha256":"bbcca859a260ad2a700d7eab5f4099a1917f6ff3d6c841c354b8dfa39352d65d","source":{"kind":"arxiv","id":"2307.12126","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.12126","created_at":"2026-07-05T08:21:05Z"},{"alias_kind":"arxiv_version","alias_value":"2307.12126v2","created_at":"2026-07-05T08:21:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.12126","created_at":"2026-07-05T08:21:05Z"},{"alias_kind":"pith_short_12","alias_value":"XPGKQWNCMCWS","created_at":"2026-07-05T08:21:05Z"},{"alias_kind":"pith_short_16","alias_value":"XPGKQWNCMCWSU4AN","created_at":"2026-07-05T08:21:05Z"},{"alias_kind":"pith_short_8","alias_value":"XPGKQWNC","created_at":"2026-07-05T08:21:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:XPGKQWNCMCWSU4ANP2VV6QEZUG","target":"record","payload":{"canonical_record":{"source":{"id":"2307.12126","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2023-07-22T17:07:26Z","cross_cats_sorted":["eess.SP","math.IT"],"title_canon_sha256":"908ca5fcae47a43ba0553a12348b333222282ab3d83cd92e84307195e2b0ca63","abstract_canon_sha256":"ba439df53e2b5de9fbeddc06773ae5859f011fd624422453fca843ca0fc12a94"},"schema_version":"1.0"},"canonical_sha256":"bbcca859a260ad2a700d7eab5f4099a1917f6ff3d6c841c354b8dfa39352d65d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:21:05.818950Z","signature_b64":"7/RVwn5xb/+8saIdE5NqAIainIaSzvSUiPZexqcO18N18q3DAfyqsFkx+cOCghQqDpx1SGqymdnnU8qYVYWLAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bbcca859a260ad2a700d7eab5f4099a1917f6ff3d6c841c354b8dfa39352d65d","last_reissued_at":"2026-07-05T08:21:05.818485Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:21:05.818485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2307.12126","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":"2026-07-05T08:21:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nJ/v8Q/B1KM6B3T+2AYtjbotA/UcZ/WgXHg+J3sY+r0pBxGsHmigtt3N/QXyIkqzQJfu2c6Z9v9dll00MdaCDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T11:02:42.044072Z"},"content_sha256":"4ce03c9bdea2a996d066e820766f44fa8ba3ba310af2dd15a73c2606c56a9304","schema_version":"1.0","event_id":"sha256:4ce03c9bdea2a996d066e820766f44fa8ba3ba310af2dd15a73c2606c56a9304"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:XPGKQWNCMCWSU4ANP2VV6QEZUG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal preprocessing of WiFi CSI for sensing applications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP","math.IT"],"primary_cat":"cs.IT","authors_text":"Abhishek Sehgal, Hao Chen, Hao Hsuan Chang, Jianzhong (Charlie) Zhang, Vishnu V. Ratnam","submitted_at":"2023-07-22T17:07:26Z","abstract_excerpt":"Due to its ubiquitous and contact-free nature, the use of WiFi infrastructure for performing sensing tasks has tremendous potential. However, the channel state information (CSI) measured by a WiFi receiver suffers from errors in both its gain and phase, which can significantly hinder sensing tasks. By analyzing these errors from different WiFi receivers, a mathematical model for these gain and phase errors is developed in this work. Based on these models, several theoretically justified preprocessing algorithms for correcting such errors at a receiver and, thus, obtaining clean CSI are present"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.12126","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/2307.12126/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":"2026-07-05T08:21:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jNyTeVLxDjKF/XuhhfjnpiPlufmQn6d0PF0I/pUEpBtzVU9P8UqTZj8feulUG9meHTpcluOljyfilyZ+xO1aAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T11:02:42.044413Z"},"content_sha256":"799cb1f84b575ea8800a8e519ea739eece9cb48fbb0018d128df7b5dc419aa2d","schema_version":"1.0","event_id":"sha256:799cb1f84b575ea8800a8e519ea739eece9cb48fbb0018d128df7b5dc419aa2d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XPGKQWNCMCWSU4ANP2VV6QEZUG/bundle.json","state_url":"https://pith.science/pith/XPGKQWNCMCWSU4ANP2VV6QEZUG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XPGKQWNCMCWSU4ANP2VV6QEZUG/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":"2026-08-23T11:02:42Z","links":{"resolver":"https://pith.science/pith/XPGKQWNCMCWSU4ANP2VV6QEZUG","bundle":"https://pith.science/pith/XPGKQWNCMCWSU4ANP2VV6QEZUG/bundle.json","state":"https://pith.science/pith/XPGKQWNCMCWSU4ANP2VV6QEZUG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XPGKQWNCMCWSU4ANP2VV6QEZUG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:XPGKQWNCMCWSU4ANP2VV6QEZUG","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":"ba439df53e2b5de9fbeddc06773ae5859f011fd624422453fca843ca0fc12a94","cross_cats_sorted":["eess.SP","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2023-07-22T17:07:26Z","title_canon_sha256":"908ca5fcae47a43ba0553a12348b333222282ab3d83cd92e84307195e2b0ca63"},"schema_version":"1.0","source":{"id":"2307.12126","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.12126","created_at":"2026-07-05T08:21:05Z"},{"alias_kind":"arxiv_version","alias_value":"2307.12126v2","created_at":"2026-07-05T08:21:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.12126","created_at":"2026-07-05T08:21:05Z"},{"alias_kind":"pith_short_12","alias_value":"XPGKQWNCMCWS","created_at":"2026-07-05T08:21:05Z"},{"alias_kind":"pith_short_16","alias_value":"XPGKQWNCMCWSU4AN","created_at":"2026-07-05T08:21:05Z"},{"alias_kind":"pith_short_8","alias_value":"XPGKQWNC","created_at":"2026-07-05T08:21:05Z"}],"graph_snapshots":[{"event_id":"sha256:799cb1f84b575ea8800a8e519ea739eece9cb48fbb0018d128df7b5dc419aa2d","target":"graph","created_at":"2026-07-05T08:21:05Z","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/2307.12126/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Due to its ubiquitous and contact-free nature, the use of WiFi infrastructure for performing sensing tasks has tremendous potential. However, the channel state information (CSI) measured by a WiFi receiver suffers from errors in both its gain and phase, which can significantly hinder sensing tasks. By analyzing these errors from different WiFi receivers, a mathematical model for these gain and phase errors is developed in this work. Based on these models, several theoretically justified preprocessing algorithms for correcting such errors at a receiver and, thus, obtaining clean CSI are present","authors_text":"Abhishek Sehgal, Hao Chen, Hao Hsuan Chang, Jianzhong (Charlie) Zhang, Vishnu V. Ratnam","cross_cats":["eess.SP","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2023-07-22T17:07:26Z","title":"Optimal preprocessing of WiFi CSI for sensing applications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.12126","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":"sha256:4ce03c9bdea2a996d066e820766f44fa8ba3ba310af2dd15a73c2606c56a9304","target":"record","created_at":"2026-07-05T08:21:05Z","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":"ba439df53e2b5de9fbeddc06773ae5859f011fd624422453fca843ca0fc12a94","cross_cats_sorted":["eess.SP","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2023-07-22T17:07:26Z","title_canon_sha256":"908ca5fcae47a43ba0553a12348b333222282ab3d83cd92e84307195e2b0ca63"},"schema_version":"1.0","source":{"id":"2307.12126","kind":"arxiv","version":2}},"canonical_sha256":"bbcca859a260ad2a700d7eab5f4099a1917f6ff3d6c841c354b8dfa39352d65d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bbcca859a260ad2a700d7eab5f4099a1917f6ff3d6c841c354b8dfa39352d65d","first_computed_at":"2026-07-05T08:21:05.818485Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:21:05.818485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7/RVwn5xb/+8saIdE5NqAIainIaSzvSUiPZexqcO18N18q3DAfyqsFkx+cOCghQqDpx1SGqymdnnU8qYVYWLAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:21:05.818950Z","signed_message":"canonical_sha256_bytes"},"source_id":"2307.12126","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ce03c9bdea2a996d066e820766f44fa8ba3ba310af2dd15a73c2606c56a9304","sha256:799cb1f84b575ea8800a8e519ea739eece9cb48fbb0018d128df7b5dc419aa2d"],"state_sha256":"61151f5c61b1434f556c5d699aaf96478f7a95dada78e5f8a981ddd20cb18330"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p5/nk0s/exbYMcgFeK8tIr3JYSXcRjSYvbf0450luOIQ2DGSeQY+Cuu2c3VxhsHm7T+G6fKSOP/NNmTEEcHbCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T11:02:42.047499Z","bundle_sha256":"e933a9765c090332f9e39151ddce616413c2cc6913d730068fd10348309b562c"}}