{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4ENUOJW75SZFNHAUETBB7NDBQ2","short_pith_number":"pith:4ENUOJW7","canonical_record":{"source":{"id":"1811.06715","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-16T09:14:52Z","cross_cats_sorted":[],"title_canon_sha256":"bd1fa2e9a554950ce721aa00fd692c387b50483edb6c3cfc92308791495b91d4","abstract_canon_sha256":"fc58b769ac8c358eac16d3ac99def0b72da09f92f4e7f5e2eb8472b97fa97e68"},"schema_version":"1.0"},"canonical_sha256":"e11b4726dfecb2569c1424c21fb4618685b78f961111d9b648bf2bf6a0733448","source":{"kind":"arxiv","id":"1811.06715","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.06715","created_at":"2026-05-18T00:00:34Z"},{"alias_kind":"arxiv_version","alias_value":"1811.06715v1","created_at":"2026-05-18T00:00:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.06715","created_at":"2026-05-18T00:00:34Z"},{"alias_kind":"pith_short_12","alias_value":"4ENUOJW75SZF","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4ENUOJW75SZFNHAU","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4ENUOJW7","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4ENUOJW75SZFNHAUETBB7NDBQ2","target":"record","payload":{"canonical_record":{"source":{"id":"1811.06715","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-16T09:14:52Z","cross_cats_sorted":[],"title_canon_sha256":"bd1fa2e9a554950ce721aa00fd692c387b50483edb6c3cfc92308791495b91d4","abstract_canon_sha256":"fc58b769ac8c358eac16d3ac99def0b72da09f92f4e7f5e2eb8472b97fa97e68"},"schema_version":"1.0"},"canonical_sha256":"e11b4726dfecb2569c1424c21fb4618685b78f961111d9b648bf2bf6a0733448","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:34.046949Z","signature_b64":"esN0LNuavGVFQOKjysVSlZYUbw2u+ER7d+RBL3HKCfo6O7EJHTZ5vNBOQoEmgtFVu9sRnbcoehgf+S4FoTe0Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e11b4726dfecb2569c1424c21fb4618685b78f961111d9b648bf2bf6a0733448","last_reissued_at":"2026-05-18T00:00:34.046321Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:34.046321Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.06715","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":"2026-05-18T00:00:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qTkK1yCKvz8HGuae/JYorbHTnQ8DjsIlFFQOfXTiXcunHG+NkL6m9e9tKpcI9mnHWn/kYFA0KDkKvnzO1BR+AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T22:22:03.160117Z"},"content_sha256":"df634c0919f2b9837f19eaf630677865df7524c34e74e70d19b6a829eff18881","schema_version":"1.0","event_id":"sha256:df634c0919f2b9837f19eaf630677865df7524c34e74e70d19b6a829eff18881"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4ENUOJW75SZFNHAUETBB7NDBQ2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Joint Range and Angle Estimation for FMCW MIMO Radar and Its Application","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Joohwan Chun, Junghoon Kim, Sungchan Song","submitted_at":"2018-11-16T09:14:52Z","abstract_excerpt":"Recently, frequency-modulated continuous wave (FMCW) radars with array antennas are gaining in popularity on a wide variety of commercial applications. A usual approach of the range and angle estimation of a target with an array FMCW radar is to form a range-angle matrix with deramped receive signal, and then apply the two-dimensional fast Fourier transformation (2D-FFT) on the range-angle matrix. However, such frequency estimation approaches give bias error because two frequencies on the range-angle matrix are not independent to each other, unlike the 2D angle estimation with a passive planar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.06715","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":"2026-05-18T00:00:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4bALl0KdK6ZuSCvdG55BSARsPY1YOgPSGQQxBwNpkfFfzPQ4JFb/JFMVvo0syRASrMLXoBPhtzLNa59ZH5gvAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T22:22:03.160472Z"},"content_sha256":"c88744ea2c184f959c2aab0fa5ed879e32ca536511a26899d1bd44613b3f1ac6","schema_version":"1.0","event_id":"sha256:c88744ea2c184f959c2aab0fa5ed879e32ca536511a26899d1bd44613b3f1ac6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4ENUOJW75SZFNHAUETBB7NDBQ2/bundle.json","state_url":"https://pith.science/pith/4ENUOJW75SZFNHAUETBB7NDBQ2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4ENUOJW75SZFNHAUETBB7NDBQ2/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":"2026-06-02T22:22:03Z","links":{"resolver":"https://pith.science/pith/4ENUOJW75SZFNHAUETBB7NDBQ2","bundle":"https://pith.science/pith/4ENUOJW75SZFNHAUETBB7NDBQ2/bundle.json","state":"https://pith.science/pith/4ENUOJW75SZFNHAUETBB7NDBQ2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4ENUOJW75SZFNHAUETBB7NDBQ2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4ENUOJW75SZFNHAUETBB7NDBQ2","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":"fc58b769ac8c358eac16d3ac99def0b72da09f92f4e7f5e2eb8472b97fa97e68","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-16T09:14:52Z","title_canon_sha256":"bd1fa2e9a554950ce721aa00fd692c387b50483edb6c3cfc92308791495b91d4"},"schema_version":"1.0","source":{"id":"1811.06715","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.06715","created_at":"2026-05-18T00:00:34Z"},{"alias_kind":"arxiv_version","alias_value":"1811.06715v1","created_at":"2026-05-18T00:00:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.06715","created_at":"2026-05-18T00:00:34Z"},{"alias_kind":"pith_short_12","alias_value":"4ENUOJW75SZF","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4ENUOJW75SZFNHAU","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4ENUOJW7","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:c88744ea2c184f959c2aab0fa5ed879e32ca536511a26899d1bd44613b3f1ac6","target":"graph","created_at":"2026-05-18T00:00:34Z","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, frequency-modulated continuous wave (FMCW) radars with array antennas are gaining in popularity on a wide variety of commercial applications. A usual approach of the range and angle estimation of a target with an array FMCW radar is to form a range-angle matrix with deramped receive signal, and then apply the two-dimensional fast Fourier transformation (2D-FFT) on the range-angle matrix. However, such frequency estimation approaches give bias error because two frequencies on the range-angle matrix are not independent to each other, unlike the 2D angle estimation with a passive planar","authors_text":"Joohwan Chun, Junghoon Kim, Sungchan Song","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-16T09:14:52Z","title":"Joint Range and Angle Estimation for FMCW MIMO Radar and Its Application"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.06715","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:df634c0919f2b9837f19eaf630677865df7524c34e74e70d19b6a829eff18881","target":"record","created_at":"2026-05-18T00:00:34Z","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":"fc58b769ac8c358eac16d3ac99def0b72da09f92f4e7f5e2eb8472b97fa97e68","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-16T09:14:52Z","title_canon_sha256":"bd1fa2e9a554950ce721aa00fd692c387b50483edb6c3cfc92308791495b91d4"},"schema_version":"1.0","source":{"id":"1811.06715","kind":"arxiv","version":1}},"canonical_sha256":"e11b4726dfecb2569c1424c21fb4618685b78f961111d9b648bf2bf6a0733448","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e11b4726dfecb2569c1424c21fb4618685b78f961111d9b648bf2bf6a0733448","first_computed_at":"2026-05-18T00:00:34.046321Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:34.046321Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"esN0LNuavGVFQOKjysVSlZYUbw2u+ER7d+RBL3HKCfo6O7EJHTZ5vNBOQoEmgtFVu9sRnbcoehgf+S4FoTe0Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:34.046949Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.06715","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df634c0919f2b9837f19eaf630677865df7524c34e74e70d19b6a829eff18881","sha256:c88744ea2c184f959c2aab0fa5ed879e32ca536511a26899d1bd44613b3f1ac6"],"state_sha256":"f01101b8d98d5b48aa978f72695dffbcd2195f5c83b563868858183915f89412"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XPIkG+6mkzwmYleb05WMtU0F4aDacLojp520GPQdVeeOKfKlybYU2nW5uW07E+dkC+VQprPEOPV3Ild8sJOoAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T22:22:03.162555Z","bundle_sha256":"eaacd15a1d1a7ba3a7f3afc4b10f46921d48d0d588b9e187d2dffb39afe05cc3"}}