{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:DZK6AOFIXX6H5KQONDMPZLBPMP","short_pith_number":"pith:DZK6AOFI","canonical_record":{"source":{"id":"1806.11320","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-06-29T09:50:00Z","cross_cats_sorted":[],"title_canon_sha256":"8f22c7b532bed28dd2072bc07612c5c7075efbea39d43d4acc25c435ff2ab022","abstract_canon_sha256":"4f36a6514e9aa478633a47abe53b3b9013f8f62121a09c0a75d49760b8a3853e"},"schema_version":"1.0"},"canonical_sha256":"1e55e038a8bdfc7eaa0e68d8fcac2f63d5cac9ee01e76e11774d950d784202f6","source":{"kind":"arxiv","id":"1806.11320","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.11320","created_at":"2026-05-17T23:54:07Z"},{"alias_kind":"arxiv_version","alias_value":"1806.11320v2","created_at":"2026-05-17T23:54:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.11320","created_at":"2026-05-17T23:54:07Z"},{"alias_kind":"pith_short_12","alias_value":"DZK6AOFIXX6H","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"DZK6AOFIXX6H5KQO","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"DZK6AOFI","created_at":"2026-05-18T12:32:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:DZK6AOFIXX6H5KQONDMPZLBPMP","target":"record","payload":{"canonical_record":{"source":{"id":"1806.11320","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-06-29T09:50:00Z","cross_cats_sorted":[],"title_canon_sha256":"8f22c7b532bed28dd2072bc07612c5c7075efbea39d43d4acc25c435ff2ab022","abstract_canon_sha256":"4f36a6514e9aa478633a47abe53b3b9013f8f62121a09c0a75d49760b8a3853e"},"schema_version":"1.0"},"canonical_sha256":"1e55e038a8bdfc7eaa0e68d8fcac2f63d5cac9ee01e76e11774d950d784202f6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:07.209105Z","signature_b64":"laeMtvtolPt/TtB33ZT3gZIVjMS7jRYbvpwYRTv4UauUGbFmnrVi/x6tcy+A/OPz1r0jhLArxyJuBzU2eBj5AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1e55e038a8bdfc7eaa0e68d8fcac2f63d5cac9ee01e76e11774d950d784202f6","last_reissued_at":"2026-05-17T23:54:07.208574Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:07.208574Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.11320","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":"2026-05-17T23:54:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m9DNVGk6kVu2zmNw/nz3l8jchQ4XcNvx3/xs+WXqLBQlEOmpqvtgAcGhggMNlDlKfJVUNnZT2JbS+IGDcPMEDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T17:59:49.376508Z"},"content_sha256":"5c7c969475cc4e12d2cbcc3bbac001bac9f9f6636bd10a79ec70956cd39d3ea3","schema_version":"1.0","event_id":"sha256:5c7c969475cc4e12d2cbcc3bbac001bac9f9f6636bd10a79ec70956cd39d3ea3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:DZK6AOFIXX6H5KQONDMPZLBPMP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the Potential of Multi-Mode Antennas for Direction-of-Arrival Estimation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Armin Dammann, Peter A. Hoeher, Robert P\\\"ohlmann, Sami Alkubti Almasri, Siwei Zhang, Thomas Jost","submitted_at":"2018-06-29T09:50:00Z","abstract_excerpt":"In this paper, we show that a multi-mode antenna (MMA) is an interesting alternative to a conventional phased antenna array for direction-of-arrival (DoA) estimation. By MMA we mean a single physical radiator with multiple ports, which excite different characteristic modes. In contrast to phased arrays, a closed-form mathematical model of the antenna response, like a steering vector, is not straightforward to define for MMAs. Instead one has to rely on calibration measurement or electromagnetic field (EMF) simulation data, which is discrete. To perform DoA estimation, array interpolation techn"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.11320","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":""},"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":"2026-05-17T23:54:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bpJQcKltXlWtq3AY/wApMSLNNLpqFde6R3Nuh87ABzKzrvI/xaFRbDYJFbWL9OtjPaBmK93U0bc3jXHQbYDsAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T17:59:49.377240Z"},"content_sha256":"4d3bad6c2acdd2a6ec865860d78115a390ff344196642b836ffadd5bfa201e05","schema_version":"1.0","event_id":"sha256:4d3bad6c2acdd2a6ec865860d78115a390ff344196642b836ffadd5bfa201e05"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DZK6AOFIXX6H5KQONDMPZLBPMP/bundle.json","state_url":"https://pith.science/pith/DZK6AOFIXX6H5KQONDMPZLBPMP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DZK6AOFIXX6H5KQONDMPZLBPMP/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":"2026-06-07T17:59:49Z","links":{"resolver":"https://pith.science/pith/DZK6AOFIXX6H5KQONDMPZLBPMP","bundle":"https://pith.science/pith/DZK6AOFIXX6H5KQONDMPZLBPMP/bundle.json","state":"https://pith.science/pith/DZK6AOFIXX6H5KQONDMPZLBPMP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DZK6AOFIXX6H5KQONDMPZLBPMP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:DZK6AOFIXX6H5KQONDMPZLBPMP","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":"4f36a6514e9aa478633a47abe53b3b9013f8f62121a09c0a75d49760b8a3853e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-06-29T09:50:00Z","title_canon_sha256":"8f22c7b532bed28dd2072bc07612c5c7075efbea39d43d4acc25c435ff2ab022"},"schema_version":"1.0","source":{"id":"1806.11320","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.11320","created_at":"2026-05-17T23:54:07Z"},{"alias_kind":"arxiv_version","alias_value":"1806.11320v2","created_at":"2026-05-17T23:54:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.11320","created_at":"2026-05-17T23:54:07Z"},{"alias_kind":"pith_short_12","alias_value":"DZK6AOFIXX6H","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"DZK6AOFIXX6H5KQO","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"DZK6AOFI","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:4d3bad6c2acdd2a6ec865860d78115a390ff344196642b836ffadd5bfa201e05","target":"graph","created_at":"2026-05-17T23:54:07Z","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 show that a multi-mode antenna (MMA) is an interesting alternative to a conventional phased antenna array for direction-of-arrival (DoA) estimation. By MMA we mean a single physical radiator with multiple ports, which excite different characteristic modes. In contrast to phased arrays, a closed-form mathematical model of the antenna response, like a steering vector, is not straightforward to define for MMAs. Instead one has to rely on calibration measurement or electromagnetic field (EMF) simulation data, which is discrete. To perform DoA estimation, array interpolation techn","authors_text":"Armin Dammann, Peter A. Hoeher, Robert P\\\"ohlmann, Sami Alkubti Almasri, Siwei Zhang, Thomas Jost","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-06-29T09:50:00Z","title":"On the Potential of Multi-Mode Antennas for Direction-of-Arrival Estimation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.11320","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":"sha256:5c7c969475cc4e12d2cbcc3bbac001bac9f9f6636bd10a79ec70956cd39d3ea3","target":"record","created_at":"2026-05-17T23:54:07Z","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":"4f36a6514e9aa478633a47abe53b3b9013f8f62121a09c0a75d49760b8a3853e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-06-29T09:50:00Z","title_canon_sha256":"8f22c7b532bed28dd2072bc07612c5c7075efbea39d43d4acc25c435ff2ab022"},"schema_version":"1.0","source":{"id":"1806.11320","kind":"arxiv","version":2}},"canonical_sha256":"1e55e038a8bdfc7eaa0e68d8fcac2f63d5cac9ee01e76e11774d950d784202f6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1e55e038a8bdfc7eaa0e68d8fcac2f63d5cac9ee01e76e11774d950d784202f6","first_computed_at":"2026-05-17T23:54:07.208574Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:07.208574Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"laeMtvtolPt/TtB33ZT3gZIVjMS7jRYbvpwYRTv4UauUGbFmnrVi/x6tcy+A/OPz1r0jhLArxyJuBzU2eBj5AQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:07.209105Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.11320","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c7c969475cc4e12d2cbcc3bbac001bac9f9f6636bd10a79ec70956cd39d3ea3","sha256:4d3bad6c2acdd2a6ec865860d78115a390ff344196642b836ffadd5bfa201e05"],"state_sha256":"e95d4528168a960d96c9d21e9eff26f91ec66e572f786a7d5978a743430c87b2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uOfFW0Wr0+xy6uDEo8+Kj8JobQ9+DV/23Dh+EhNj4eBmTXIehdTJqiqa4bCXpNs6zpsmot26g4T4/Cfxfi7BBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T17:59:49.381129Z","bundle_sha256":"5812f52e6f665992af9646ea5913e0d6a1d85ce7d0aea14d8eb30c1434b5a18c"}}