{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:IDJC7O4OQD73IEACGY6XFYXDPT","short_pith_number":"pith:IDJC7O4O","canonical_record":{"source":{"id":"1810.11390","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-10-26T15:35:48Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"898bcfbd0b64c84a960ff34824871c75686c9570be0f0e129979666731e743a6","abstract_canon_sha256":"30840773229369052821741881b6fa89e7b55eda0f42782016597141ec1fd4ad"},"schema_version":"1.0"},"canonical_sha256":"40d22fbb8e80ffb41002363d72e2e37ccc329e810ae0b2476cc3059e8a689ac8","source":{"kind":"arxiv","id":"1810.11390","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.11390","created_at":"2026-05-18T00:02:14Z"},{"alias_kind":"arxiv_version","alias_value":"1810.11390v1","created_at":"2026-05-18T00:02:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.11390","created_at":"2026-05-18T00:02:14Z"},{"alias_kind":"pith_short_12","alias_value":"IDJC7O4OQD73","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"IDJC7O4OQD73IEAC","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"IDJC7O4O","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:IDJC7O4OQD73IEACGY6XFYXDPT","target":"record","payload":{"canonical_record":{"source":{"id":"1810.11390","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-10-26T15:35:48Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"898bcfbd0b64c84a960ff34824871c75686c9570be0f0e129979666731e743a6","abstract_canon_sha256":"30840773229369052821741881b6fa89e7b55eda0f42782016597141ec1fd4ad"},"schema_version":"1.0"},"canonical_sha256":"40d22fbb8e80ffb41002363d72e2e37ccc329e810ae0b2476cc3059e8a689ac8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:02:14.265341Z","signature_b64":"eT0KlMgLTV6/nofInFKENpkv1EQ+EaA4p7+yFZpDKb1YzKqwzwBChrNqOw/8dkWQwHu61ed+Rf4mLo1Leaz2Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"40d22fbb8e80ffb41002363d72e2e37ccc329e810ae0b2476cc3059e8a689ac8","last_reissued_at":"2026-05-18T00:02:14.264734Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:02:14.264734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.11390","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:02:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wu/CxnTC8YvnLcMugeAIb4KE5F9coKJ8WaDW/aWAwq0Wnft1Toi8xqz012HrfFJqdpQpgcQygT+UtryWhnxRBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:24:40.271756Z"},"content_sha256":"45389c1920ba5d89e1da1ffc6889d6d822e5a7a693d8bf28799e4afcc4043191","schema_version":"1.0","event_id":"sha256:45389c1920ba5d89e1da1ffc6889d6d822e5a7a693d8bf28799e4afcc4043191"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:IDJC7O4OQD73IEACGY6XFYXDPT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Joint Estimation of DOA and Frequency with Sub-Nyquist Sampling in a Binary Array Radar System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IT","math.IT"],"primary_cat":"eess.SP","authors_text":"Huaguo Zhang, Lijuan Deng, Ping Wei, Zhan Zhang","submitted_at":"2018-10-26T15:35:48Z","abstract_excerpt":"Recently, several array radar structures combined with sub-Nyquist techniques and corresponding algorithms have been extensively studied. Carrier frequency and direction-of-arrival (DOA) estimations of multiple narrow-band signals received by array radars at the sub-Nyquist rates are considered in this paper. We propose a new sub-Nyquist array radar architecture (a binary array radar separately connected to a multi-coset structure with M branches) and an efficient joint estimation algorithm which can match frequencies up with corresponding DOAs. We further come up with a delay pattern augmenti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.11390","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T00:02:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/TmTlWmovajzJRcEHdjID0rXWKn5tRtek90tOTZuGTBV0XbWtk6QGWHTKxciFDfjpWK2616Age+fjweDc9nLDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:24:40.272421Z"},"content_sha256":"807022dbf628593a19ca8eda11ed6c78d7fd7e4964841e1d3c21ebaad3ab9d3a","schema_version":"1.0","event_id":"sha256:807022dbf628593a19ca8eda11ed6c78d7fd7e4964841e1d3c21ebaad3ab9d3a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IDJC7O4OQD73IEACGY6XFYXDPT/bundle.json","state_url":"https://pith.science/pith/IDJC7O4OQD73IEACGY6XFYXDPT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IDJC7O4OQD73IEACGY6XFYXDPT/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":"2026-05-26T20:24:40Z","links":{"resolver":"https://pith.science/pith/IDJC7O4OQD73IEACGY6XFYXDPT","bundle":"https://pith.science/pith/IDJC7O4OQD73IEACGY6XFYXDPT/bundle.json","state":"https://pith.science/pith/IDJC7O4OQD73IEACGY6XFYXDPT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IDJC7O4OQD73IEACGY6XFYXDPT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:IDJC7O4OQD73IEACGY6XFYXDPT","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":"30840773229369052821741881b6fa89e7b55eda0f42782016597141ec1fd4ad","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-10-26T15:35:48Z","title_canon_sha256":"898bcfbd0b64c84a960ff34824871c75686c9570be0f0e129979666731e743a6"},"schema_version":"1.0","source":{"id":"1810.11390","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.11390","created_at":"2026-05-18T00:02:14Z"},{"alias_kind":"arxiv_version","alias_value":"1810.11390v1","created_at":"2026-05-18T00:02:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.11390","created_at":"2026-05-18T00:02:14Z"},{"alias_kind":"pith_short_12","alias_value":"IDJC7O4OQD73","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"IDJC7O4OQD73IEAC","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"IDJC7O4O","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:807022dbf628593a19ca8eda11ed6c78d7fd7e4964841e1d3c21ebaad3ab9d3a","target":"graph","created_at":"2026-05-18T00:02:14Z","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":"Recently, several array radar structures combined with sub-Nyquist techniques and corresponding algorithms have been extensively studied. Carrier frequency and direction-of-arrival (DOA) estimations of multiple narrow-band signals received by array radars at the sub-Nyquist rates are considered in this paper. We propose a new sub-Nyquist array radar architecture (a binary array radar separately connected to a multi-coset structure with M branches) and an efficient joint estimation algorithm which can match frequencies up with corresponding DOAs. We further come up with a delay pattern augmenti","authors_text":"Huaguo Zhang, Lijuan Deng, Ping Wei, Zhan Zhang","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-10-26T15:35:48Z","title":"Joint Estimation of DOA and Frequency with Sub-Nyquist Sampling in a Binary Array Radar System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.11390","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":"sha256:45389c1920ba5d89e1da1ffc6889d6d822e5a7a693d8bf28799e4afcc4043191","target":"record","created_at":"2026-05-18T00:02:14Z","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":"30840773229369052821741881b6fa89e7b55eda0f42782016597141ec1fd4ad","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-10-26T15:35:48Z","title_canon_sha256":"898bcfbd0b64c84a960ff34824871c75686c9570be0f0e129979666731e743a6"},"schema_version":"1.0","source":{"id":"1810.11390","kind":"arxiv","version":1}},"canonical_sha256":"40d22fbb8e80ffb41002363d72e2e37ccc329e810ae0b2476cc3059e8a689ac8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"40d22fbb8e80ffb41002363d72e2e37ccc329e810ae0b2476cc3059e8a689ac8","first_computed_at":"2026-05-18T00:02:14.264734Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:14.264734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eT0KlMgLTV6/nofInFKENpkv1EQ+EaA4p7+yFZpDKb1YzKqwzwBChrNqOw/8dkWQwHu61ed+Rf4mLo1Leaz2Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:14.265341Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.11390","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:45389c1920ba5d89e1da1ffc6889d6d822e5a7a693d8bf28799e4afcc4043191","sha256:807022dbf628593a19ca8eda11ed6c78d7fd7e4964841e1d3c21ebaad3ab9d3a"],"state_sha256":"e8974d405fa649278e567ecd714b24170055686ba2dfdeb537e8a6509c24a389"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yyOr0RzOMmufsHHfvKdcbq7Y5J+vKrTGOEp7jHGBsNpnTQHXjTbqwT/MtYEziqgOS9nEKnasZ0D2zEeQg0LHBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T20:24:40.275310Z","bundle_sha256":"bef77cd935525a0fc14f14343e4c909c5e132a0205a1c4edcebbd3853fd9ff9b"}}