{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:SSDAX46CK4NUZLXVCDG7DJLK6S","short_pith_number":"pith:SSDAX46C","schema_version":"1.0","canonical_sha256":"94860bf3c2571b4caef510cdf1a56af497c53d89b32274be130112d543a522d0","source":{"kind":"arxiv","id":"2305.06478","version":2},"attestation_state":"computed","paper":{"title":"On the Impossibility of Lossless Waveform Rank Reduction for Certain Redundant Arrays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Piya Pal, Robin Rajam\\\"aki","submitted_at":"2023-05-10T22:05:19Z","abstract_excerpt":"Efficient use of spatio-temporal resources, including sensor arrays and transmit waveforms, is a key challenge in modern MIMO active sensing systems. This paper studies the impact of array redundancy and waveform rank (WR) on active sensing performance. Specifically, we show that parameter identifiability at reduced WR critically depends on subspace properties of the so-called array redundancy pattern. We show that array geometries with identical sum co-arrays can exhibit markedly different identifiability properties at low WR. We derive a novel necessary condition for maximizing identifiabili"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2305.06478","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2023-05-10T22:05:19Z","cross_cats_sorted":[],"title_canon_sha256":"b412f1d90e3b1d0695dcc8cd12192a746d0bf9c7688f580647b0d405fb550275","abstract_canon_sha256":"cf57dda88ba3172ee1c2fbc1defd50e05a3c683747a206f5fe14187d2ebc4ee5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-20T02:05:31.087622Z","signature_b64":"zNWPqmYhakU5ycrZHAitHy/dikb4WG1CouusMichHTUVOBI3FTu8LFZeeefk/CzZNKei0zjb3cNjyQcVfC4UDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"94860bf3c2571b4caef510cdf1a56af497c53d89b32274be130112d543a522d0","last_reissued_at":"2026-05-20T02:05:31.086805Z","signature_status":"signed_v1","first_computed_at":"2026-05-20T02:05:31.086805Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the Impossibility of Lossless Waveform Rank Reduction for Certain Redundant Arrays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Piya Pal, Robin Rajam\\\"aki","submitted_at":"2023-05-10T22:05:19Z","abstract_excerpt":"Efficient use of spatio-temporal resources, including sensor arrays and transmit waveforms, is a key challenge in modern MIMO active sensing systems. This paper studies the impact of array redundancy and waveform rank (WR) on active sensing performance. Specifically, we show that parameter identifiability at reduced WR critically depends on subspace properties of the so-called array redundancy pattern. We show that array geometries with identical sum co-arrays can exhibit markedly different identifiability properties at low WR. We derive a novel necessary condition for maximizing identifiabili"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.06478","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/2305.06478/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2305.06478","created_at":"2026-05-20T02:05:31.086917+00:00"},{"alias_kind":"arxiv_version","alias_value":"2305.06478v2","created_at":"2026-05-20T02:05:31.086917+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2305.06478","created_at":"2026-05-20T02:05:31.086917+00:00"},{"alias_kind":"pith_short_12","alias_value":"SSDAX46CK4NU","created_at":"2026-05-20T02:05:31.086917+00:00"},{"alias_kind":"pith_short_16","alias_value":"SSDAX46CK4NUZLXV","created_at":"2026-05-20T02:05:31.086917+00:00"},{"alias_kind":"pith_short_8","alias_value":"SSDAX46C","created_at":"2026-05-20T02:05:31.086917+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/SSDAX46CK4NUZLXVCDG7DJLK6S","json":"https://pith.science/pith/SSDAX46CK4NUZLXVCDG7DJLK6S.json","graph_json":"https://pith.science/api/pith-number/SSDAX46CK4NUZLXVCDG7DJLK6S/graph.json","events_json":"https://pith.science/api/pith-number/SSDAX46CK4NUZLXVCDG7DJLK6S/events.json","paper":"https://pith.science/paper/SSDAX46C"},"agent_actions":{"view_html":"https://pith.science/pith/SSDAX46CK4NUZLXVCDG7DJLK6S","download_json":"https://pith.science/pith/SSDAX46CK4NUZLXVCDG7DJLK6S.json","view_paper":"https://pith.science/paper/SSDAX46C","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2305.06478&json=true","fetch_graph":"https://pith.science/api/pith-number/SSDAX46CK4NUZLXVCDG7DJLK6S/graph.json","fetch_events":"https://pith.science/api/pith-number/SSDAX46CK4NUZLXVCDG7DJLK6S/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SSDAX46CK4NUZLXVCDG7DJLK6S/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SSDAX46CK4NUZLXVCDG7DJLK6S/action/storage_attestation","attest_author":"https://pith.science/pith/SSDAX46CK4NUZLXVCDG7DJLK6S/action/author_attestation","sign_citation":"https://pith.science/pith/SSDAX46CK4NUZLXVCDG7DJLK6S/action/citation_signature","submit_replication":"https://pith.science/pith/SSDAX46CK4NUZLXVCDG7DJLK6S/action/replication_record"}},"created_at":"2026-05-20T02:05:31.086917+00:00","updated_at":"2026-05-20T02:05:31.086917+00:00"}