{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ICGJ6HK2LQT4ADCV4TXGRZY6MW","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":"55da05f3ac8327b2c6b06bea66119b986dd023092f43eca1b32548e1d482ecb5","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-05-17T06:20:20Z","title_canon_sha256":"15ed9461e620dbdc1383aafe5823ecba44ab500f7d6884052523725be642f915"},"schema_version":"1.0","source":{"id":"1805.06611","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.06611","created_at":"2026-05-18T00:15:43Z"},{"alias_kind":"arxiv_version","alias_value":"1805.06611v1","created_at":"2026-05-18T00:15:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.06611","created_at":"2026-05-18T00:15:43Z"},{"alias_kind":"pith_short_12","alias_value":"ICGJ6HK2LQT4","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"ICGJ6HK2LQT4ADCV","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"ICGJ6HK2","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:734e6cb10fbb5974ec427909854fcaec98c1a9b0633bd800268e2d03f3b99633","target":"graph","created_at":"2026-05-18T00:15:43Z","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":"This paper investigates the impact of array switching patterns on the accuracy of parameter estimation of multipath components for a time division multiplexed (TDM) channel sounder. To measure fast time-varying channels, the conventional uniform array switching pattern poses a fundamental limit of the number of antennas that a TDM channel sounder can utilize. We propose a method, which is based on the simulated annealing algorithm, to find non-uniform array switching patterns for realistic antenna arrays, so that we can extend the Doppler estimation range of the channel sounder by suppressing ","authors_text":"Andreas F. Molisch, C. Umit Bas, Olivier Renaudin, Rui Wang, Seun Sangodoyin","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-05-17T06:20:20Z","title":"Antenna Switching Sequence Design for Channel Sounding in a Fast Time-varying Channel"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.06611","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":"sha256:8c2302b145e0060f054c39ef3f7a23e5b6df9a3f4b103ddb5e563ec8b8949cd7","target":"record","created_at":"2026-05-18T00:15:43Z","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":"55da05f3ac8327b2c6b06bea66119b986dd023092f43eca1b32548e1d482ecb5","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-05-17T06:20:20Z","title_canon_sha256":"15ed9461e620dbdc1383aafe5823ecba44ab500f7d6884052523725be642f915"},"schema_version":"1.0","source":{"id":"1805.06611","kind":"arxiv","version":1}},"canonical_sha256":"408c9f1d5a5c27c00c55e4ee68e71e659e2a4cc47261f4c0a3059748bd3f71a5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"408c9f1d5a5c27c00c55e4ee68e71e659e2a4cc47261f4c0a3059748bd3f71a5","first_computed_at":"2026-05-18T00:15:43.914148Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:15:43.914148Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+zImBnm7FXuGnjAM0/0/UGmxxVlLMyC6CkP0Eld8v1WTlCjx4D4zPll+x5V/Xj3gzOe+MNOtge/hcrpXGS98CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:15:43.914602Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.06611","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8c2302b145e0060f054c39ef3f7a23e5b6df9a3f4b103ddb5e563ec8b8949cd7","sha256:734e6cb10fbb5974ec427909854fcaec98c1a9b0633bd800268e2d03f3b99633"],"state_sha256":"9ac74ceefc93a27144b40343591e065bea5ee9e1042d7bb315c50488f084288a"}