{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:3TCCE3LOR57ILOIFUN7ZQU46SM","short_pith_number":"pith:3TCCE3LO","canonical_record":{"source":{"id":"2303.15112","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-03-27T11:31:13Z","cross_cats_sorted":[],"title_canon_sha256":"247ea32b61e39fce2191c39ed30c2794e115739081e36bc6546063a7b22c2cba","abstract_canon_sha256":"0d8570af682e45fb9273c8f4bb8919898f2f0439d23ffebccf98a87eb12ffc93"},"schema_version":"1.0"},"canonical_sha256":"dcc4226d6e8f7e85b905a37f98539e931b45387ded91642a68025654918544b5","source":{"kind":"arxiv","id":"2303.15112","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.15112","created_at":"2026-07-05T06:09:49Z"},{"alias_kind":"arxiv_version","alias_value":"2303.15112v2","created_at":"2026-07-05T06:09:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.15112","created_at":"2026-07-05T06:09:49Z"},{"alias_kind":"pith_short_12","alias_value":"3TCCE3LOR57I","created_at":"2026-07-05T06:09:49Z"},{"alias_kind":"pith_short_16","alias_value":"3TCCE3LOR57ILOIF","created_at":"2026-07-05T06:09:49Z"},{"alias_kind":"pith_short_8","alias_value":"3TCCE3LO","created_at":"2026-07-05T06:09:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:3TCCE3LOR57ILOIFUN7ZQU46SM","target":"record","payload":{"canonical_record":{"source":{"id":"2303.15112","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-03-27T11:31:13Z","cross_cats_sorted":[],"title_canon_sha256":"247ea32b61e39fce2191c39ed30c2794e115739081e36bc6546063a7b22c2cba","abstract_canon_sha256":"0d8570af682e45fb9273c8f4bb8919898f2f0439d23ffebccf98a87eb12ffc93"},"schema_version":"1.0"},"canonical_sha256":"dcc4226d6e8f7e85b905a37f98539e931b45387ded91642a68025654918544b5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:09:49.771138Z","signature_b64":"FdN8UE8u9IByD5roythgf+nqezo9yfWzTi+DzELSPGGQq1wBrorOGmOeFg5LIUerAJLs9ag85vCjEsr3p1fXCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dcc4226d6e8f7e85b905a37f98539e931b45387ded91642a68025654918544b5","last_reissued_at":"2026-07-05T06:09:49.770700Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:09:49.770700Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.15112","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:09:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y4OpC46hEEYx/eXZ51DukRsY3ACGufPJ+K2L94SRucYG7KjM0Yw64vMbTcOzacjKOksS5KR/PTqZU6dZi+ZjAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T08:25:55.717304Z"},"content_sha256":"6d27828411f4d2e7cdbc6adf965c0fcfa51e5a50cae31d0ecef22bc3fcb1332b","schema_version":"1.0","event_id":"sha256:6d27828411f4d2e7cdbc6adf965c0fcfa51e5a50cae31d0ecef22bc3fcb1332b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:3TCCE3LOR57ILOIFUN7ZQU46SM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal Mixed-ADC arrangement for DOA Estimation via CRB using ULA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Jun Liu, Xiaolei Shang, Xinnan Zhang, Yuanbo Cheng","submitted_at":"2023-03-27T11:31:13Z","abstract_excerpt":"We consider a mixed analog-to-digital converter (ADC) based architecture for direction of arrival (DOA) estimation using a uniform linear array (ULA). We derive the Cram{\\'e}r-Rao bound (CRB) of the DOA under the optimal time-varying threshold, and find that the asymptotic CRB is related to the arrangement of high-precision and one-bit ADCs for a fixed number of ADCs. Then, a new concept called ``mixed-precision arrangement\" is proposed. It is proven that better performance for DOA estimation is achieved when high-precision ADCs are distributed evenly around the edges of the ULA. This result c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.15112","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2303.15112/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T06:09:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Zmo9/+Zo0NhYb0iBHMKllDLy4ToRMsQUlap9XtjMXarAVl/fyxyBKvimgffCpQsqU6vcf8iWx7IpCvFoesjQDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T08:25:55.717778Z"},"content_sha256":"8ee02b686b1398b9a3f7ee9d2c48ab0080fe104aba78a47ec9706ac49fb93844","schema_version":"1.0","event_id":"sha256:8ee02b686b1398b9a3f7ee9d2c48ab0080fe104aba78a47ec9706ac49fb93844"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3TCCE3LOR57ILOIFUN7ZQU46SM/bundle.json","state_url":"https://pith.science/pith/3TCCE3LOR57ILOIFUN7ZQU46SM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3TCCE3LOR57ILOIFUN7ZQU46SM/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":"2026-08-11T08:25:55Z","links":{"resolver":"https://pith.science/pith/3TCCE3LOR57ILOIFUN7ZQU46SM","bundle":"https://pith.science/pith/3TCCE3LOR57ILOIFUN7ZQU46SM/bundle.json","state":"https://pith.science/pith/3TCCE3LOR57ILOIFUN7ZQU46SM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3TCCE3LOR57ILOIFUN7ZQU46SM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:3TCCE3LOR57ILOIFUN7ZQU46SM","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":"0d8570af682e45fb9273c8f4bb8919898f2f0439d23ffebccf98a87eb12ffc93","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-03-27T11:31:13Z","title_canon_sha256":"247ea32b61e39fce2191c39ed30c2794e115739081e36bc6546063a7b22c2cba"},"schema_version":"1.0","source":{"id":"2303.15112","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.15112","created_at":"2026-07-05T06:09:49Z"},{"alias_kind":"arxiv_version","alias_value":"2303.15112v2","created_at":"2026-07-05T06:09:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.15112","created_at":"2026-07-05T06:09:49Z"},{"alias_kind":"pith_short_12","alias_value":"3TCCE3LOR57I","created_at":"2026-07-05T06:09:49Z"},{"alias_kind":"pith_short_16","alias_value":"3TCCE3LOR57ILOIF","created_at":"2026-07-05T06:09:49Z"},{"alias_kind":"pith_short_8","alias_value":"3TCCE3LO","created_at":"2026-07-05T06:09:49Z"}],"graph_snapshots":[{"event_id":"sha256:8ee02b686b1398b9a3f7ee9d2c48ab0080fe104aba78a47ec9706ac49fb93844","target":"graph","created_at":"2026-07-05T06:09:49Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2303.15112/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We consider a mixed analog-to-digital converter (ADC) based architecture for direction of arrival (DOA) estimation using a uniform linear array (ULA). We derive the Cram{\\'e}r-Rao bound (CRB) of the DOA under the optimal time-varying threshold, and find that the asymptotic CRB is related to the arrangement of high-precision and one-bit ADCs for a fixed number of ADCs. Then, a new concept called ``mixed-precision arrangement\" is proposed. It is proven that better performance for DOA estimation is achieved when high-precision ADCs are distributed evenly around the edges of the ULA. This result c","authors_text":"Jun Liu, Xiaolei Shang, Xinnan Zhang, Yuanbo Cheng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-03-27T11:31:13Z","title":"Optimal Mixed-ADC arrangement for DOA Estimation via CRB using ULA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.15112","kind":"arxiv","version":2},"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":"sha256:6d27828411f4d2e7cdbc6adf965c0fcfa51e5a50cae31d0ecef22bc3fcb1332b","target":"record","created_at":"2026-07-05T06:09:49Z","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":"0d8570af682e45fb9273c8f4bb8919898f2f0439d23ffebccf98a87eb12ffc93","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-03-27T11:31:13Z","title_canon_sha256":"247ea32b61e39fce2191c39ed30c2794e115739081e36bc6546063a7b22c2cba"},"schema_version":"1.0","source":{"id":"2303.15112","kind":"arxiv","version":2}},"canonical_sha256":"dcc4226d6e8f7e85b905a37f98539e931b45387ded91642a68025654918544b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dcc4226d6e8f7e85b905a37f98539e931b45387ded91642a68025654918544b5","first_computed_at":"2026-07-05T06:09:49.770700Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:09:49.770700Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FdN8UE8u9IByD5roythgf+nqezo9yfWzTi+DzELSPGGQq1wBrorOGmOeFg5LIUerAJLs9ag85vCjEsr3p1fXCA==","signature_status":"signed_v1","signed_at":"2026-07-05T06:09:49.771138Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.15112","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d27828411f4d2e7cdbc6adf965c0fcfa51e5a50cae31d0ecef22bc3fcb1332b","sha256:8ee02b686b1398b9a3f7ee9d2c48ab0080fe104aba78a47ec9706ac49fb93844"],"state_sha256":"a21c5bd5e94ebc8ae2840eb1ac4cf754261d3c6d473c5b9755bc17a28f15040c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jPvW+F9GixaaM4vMc1ncEL8eYoLr6DVReyhN/QrLRExdbFguMs0ppqB5x0NtOGfaul0mDuq2X2xmJ1dub4p8BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T08:25:55.722248Z","bundle_sha256":"155977247f96ae42fba01315deade3715c264961a028d548330b950dd32e2877"}}