{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:LPW7I4D5NZFUNZBAAYVABMBFIB","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":"45b00603667dedc9bbbb3b3b358eeb4613059c6ee20750a41ac939aa89117699","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2016-12-02T22:02:04Z","title_canon_sha256":"4d3ddd5cd2f8c5bba96b2ef9f012514f88f6b8fbf8b16817d6b94dfdb453ebe9"},"schema_version":"1.0","source":{"id":"1612.00876","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.00876","created_at":"2026-05-17T23:46:55Z"},{"alias_kind":"arxiv_version","alias_value":"1612.00876v1","created_at":"2026-05-17T23:46:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.00876","created_at":"2026-05-17T23:46:55Z"},{"alias_kind":"pith_short_12","alias_value":"LPW7I4D5NZFU","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"LPW7I4D5NZFUNZBA","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"LPW7I4D5","created_at":"2026-05-18T12:30:29Z"}],"graph_snapshots":[{"event_id":"sha256:7f0cc37653b543bb432a3c41f717b6a7681b8a3e71d22fd254d35565f2009ca4","target":"graph","created_at":"2026-05-17T23:46:55Z","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":"In this paper we present FRIDA---an algorithm for estimating directions of arrival of multiple wideband sound sources. FRIDA combines multi-band information coherently and achieves state-of-the-art resolution at extremely low signal-to-noise ratios. It works for arbitrary array layouts, but unlike the various steered response power and subspace methods, it does not require a grid search. FRIDA leverages recent advances in sampling signals with a finite rate of innovation. It is based on the insight that for any array layout, the entries of the spatial covariance matrix can be linearly transfor","authors_text":"Eric Bezzam, Hanjie Pan, Ivan Dokmanic, Martin Vetterli, Robin Scheibler","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2016-12-02T22:02:04Z","title":"FRIDA: FRI-Based DOA Estimation for Arbitrary Array Layouts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.00876","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":"sha256:9aacd7d05bb2c4b2b4ba46bd56b59175ba7d3b2396eecc658ca74c05b74568a1","target":"record","created_at":"2026-05-17T23:46:55Z","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":"45b00603667dedc9bbbb3b3b358eeb4613059c6ee20750a41ac939aa89117699","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2016-12-02T22:02:04Z","title_canon_sha256":"4d3ddd5cd2f8c5bba96b2ef9f012514f88f6b8fbf8b16817d6b94dfdb453ebe9"},"schema_version":"1.0","source":{"id":"1612.00876","kind":"arxiv","version":1}},"canonical_sha256":"5bedf4707d6e4b46e420062a00b025404ff6a9b9488457cc503d2a0fd9168d7b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5bedf4707d6e4b46e420062a00b025404ff6a9b9488457cc503d2a0fd9168d7b","first_computed_at":"2026-05-17T23:46:55.790980Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:55.790980Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AjbDtXRrrQO+jnVqC8scDHn5ZlCs14cFOavmvWB2rMOF+a/VPlTiCD15SdEGpBsOkFQdwtC0VTWk5p8dl45GCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:55.791491Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.00876","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9aacd7d05bb2c4b2b4ba46bd56b59175ba7d3b2396eecc658ca74c05b74568a1","sha256:7f0cc37653b543bb432a3c41f717b6a7681b8a3e71d22fd254d35565f2009ca4"],"state_sha256":"cc007a0f76d234fd993c2e9802e5b9e4e6de3e750510c4d758a752cddbb93f91"}