{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:5RLLF6KAZ7GWASTQVNTHV4IUYF","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":"6de284efb6709d12b17c053c0de83133b8ba7a54d3e6a7ca27afc0e858a369cc","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-12-20T07:57:09Z","title_canon_sha256":"e7344d28297de40bece581f6ed509055703659c4a595980d2a998f245b467296"},"schema_version":"1.0","source":{"id":"1612.06537","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.06537","created_at":"2026-05-18T00:52:22Z"},{"alias_kind":"arxiv_version","alias_value":"1612.06537v4","created_at":"2026-05-18T00:52:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.06537","created_at":"2026-05-18T00:52:22Z"},{"alias_kind":"pith_short_12","alias_value":"5RLLF6KAZ7GW","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5RLLF6KAZ7GWASTQ","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5RLLF6KA","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:6408f63c45d6060cdf95341351af22c899a55940ee7c49bad9627a1937cc1340","target":"graph","created_at":"2026-05-18T00:52:22Z","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":"This paper considers the problem of direction-of-arrival (DOA) estimation of coherent signals on passive coprime arrays, where we resort to the fourth-order cumulants of the received signal to explore more information. A fourth-order cumulant matrix (FCM) is introduced for the coprime arrays. The special structure of the FCM is combined with the array configuration to resolve the coherent signals. Since each sparse array of the coprime arrays is uniform, a series of overlapping identical subarrays can be extracted. Using this property, we propose a generalized spatial smoothing scheme applied ","authors_text":"Xiqin Wang, Yang Hu, Yimin Liu","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-12-20T07:57:09Z","title":"DOA Estimation of Coherent Signals on Coprime Arrays Exploiting Fourth-Order Cumulants"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.06537","kind":"arxiv","version":4},"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":"sha256:88dda35434c6e9dc47e0f35080cc78de479cbc5c381f756f463cdc4909308ae6","target":"record","created_at":"2026-05-18T00:52:22Z","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":"6de284efb6709d12b17c053c0de83133b8ba7a54d3e6a7ca27afc0e858a369cc","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-12-20T07:57:09Z","title_canon_sha256":"e7344d28297de40bece581f6ed509055703659c4a595980d2a998f245b467296"},"schema_version":"1.0","source":{"id":"1612.06537","kind":"arxiv","version":4}},"canonical_sha256":"ec56b2f940cfcd604a70ab667af114c15defb019fbf0e00acc5bedffc30a5b65","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ec56b2f940cfcd604a70ab667af114c15defb019fbf0e00acc5bedffc30a5b65","first_computed_at":"2026-05-18T00:52:22.348010Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:52:22.348010Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jvo7OEIGehKjvcvWEu3P1kNuKgZHJRuWPcP64gX75UkhFkJ+r4BG1nJ4fGjQNLFLxPgylwobQET5A5k0Jvh6CA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:52:22.348829Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.06537","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:88dda35434c6e9dc47e0f35080cc78de479cbc5c381f756f463cdc4909308ae6","sha256:6408f63c45d6060cdf95341351af22c899a55940ee7c49bad9627a1937cc1340"],"state_sha256":"aa846dfa350c5750a617b87ba4893acb2bd228382331f3f56489056e6c0d6b39"}