{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:JYMZFM65O636PJDCYGIB7U7NJV","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":"774c63da8e8b58dbbd2f6e809a781c629efdc3464d163e1521ca4884ab640121","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2011-09-27T04:38:33Z","title_canon_sha256":"735c1506322995217cca66733007752456c04150e223b620c127bc94615d887f"},"schema_version":"1.0","source":{"id":"1109.5770","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.5770","created_at":"2026-05-18T04:12:11Z"},{"alias_kind":"arxiv_version","alias_value":"1109.5770v1","created_at":"2026-05-18T04:12:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.5770","created_at":"2026-05-18T04:12:11Z"},{"alias_kind":"pith_short_12","alias_value":"JYMZFM65O636","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"JYMZFM65O636PJDC","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"JYMZFM65","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:d260ebf7f129c9ba36037a73be78721729363c8cd5e4f3be10c4da72f3dc8e77","target":"graph","created_at":"2026-05-18T04:12:11Z","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"},"paper":{"abstract_excerpt":"We consider the problem of sensor localization in a wireless network in a multipath environment, where time and angle of arrival information are available at each sensor. We propose a distributed algorithm based on belief propagation, which allows sensors to cooperatively self-localize with respect to one single anchor in a multihop network. The algorithm has low overhead and is scalable. Simulations show that although the network is loopy, the proposed algorithm converges, and achieves good localization accuracy.","authors_text":"Mei Leng, Tony Q.S. Quek, Wee Peng Tay","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2011-09-27T04:38:33Z","title":"Cooperative and Distributed Localization for Wireless Sensor Networks in Multipath Environments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.5770","kind":"arxiv","version":1},"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":"sha256:7063e22d92848ce01fa7eb335b424c3ec7c183aaade08cd7134e12a3f3a277f5","target":"record","created_at":"2026-05-18T04:12:11Z","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":"774c63da8e8b58dbbd2f6e809a781c629efdc3464d163e1521ca4884ab640121","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2011-09-27T04:38:33Z","title_canon_sha256":"735c1506322995217cca66733007752456c04150e223b620c127bc94615d887f"},"schema_version":"1.0","source":{"id":"1109.5770","kind":"arxiv","version":1}},"canonical_sha256":"4e1992b3dd77b7e7a462c1901fd3ed4d71204ade4c8b4dde8dc8a88a9efa9a17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4e1992b3dd77b7e7a462c1901fd3ed4d71204ade4c8b4dde8dc8a88a9efa9a17","first_computed_at":"2026-05-18T04:12:11.236857Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:12:11.236857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8KiTvmGu2sMKwXCRzwsEAVwHyaGOywyzH1uYI6ai6qhKzvA14Ptvl+VcP1lIEb8rFibXjOJPBOAtAc3fnk9bCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:12:11.237423Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.5770","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7063e22d92848ce01fa7eb335b424c3ec7c183aaade08cd7134e12a3f3a277f5","sha256:d260ebf7f129c9ba36037a73be78721729363c8cd5e4f3be10c4da72f3dc8e77"],"state_sha256":"45d58b41700222b98de30223a553e6c1fd9a211fca841637e0e6ead48927d1e0"}