{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:2MKSO4AJDULQYS5SSHQHSBH5ZF","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":"f53c1a535ab776f6aa9732eee68db647d05bec867b10c27a90c7fb19fa6fde90","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2014-11-24T20:26:48Z","title_canon_sha256":"9d48c66ccb1237aeb48e8b3acc9b068e458905ba0f7d87bbf96881b4d2ff45ca"},"schema_version":"1.0","source":{"id":"1411.6897","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.6897","created_at":"2026-05-18T00:50:31Z"},{"alias_kind":"arxiv_version","alias_value":"1411.6897v4","created_at":"2026-05-18T00:50:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.6897","created_at":"2026-05-18T00:50:31Z"},{"alias_kind":"pith_short_12","alias_value":"2MKSO4AJDULQ","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"2MKSO4AJDULQYS5S","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"2MKSO4AJ","created_at":"2026-05-18T12:28:11Z"}],"graph_snapshots":[{"event_id":"sha256:b65a7931df2a425cdfd7e78bca4b2282439578352166b8c6c3cb5b5636f7ef2b","target":"graph","created_at":"2026-05-18T00:50:31Z","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":"Time-reversal (TR) is a beamforming technique for frequency-selective channels, which has received increasing attention due to its high energy efficiency and low computational complexity for wireless communications. In this paper, we present two contributions on time-reversal (TR) wireless beamforming for single-user indoor wideband MISO systems. First, we provide novel analyses of a baseband TR system using two commonly used indoor propagation channel models. We derive closed-form approximations for the inter-symbol interference (ISI) with these channel models in order to characterize the inf","authors_text":"Carlos A. Viteri-Mera, Fernando L. Teixeira","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2014-11-24T20:26:48Z","title":"Equalized Time Reversal Beamforming for Indoor Wireless Communications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.6897","kind":"arxiv","version":4},"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":"sha256:5e5c7b99121ba84ce9a35e29f2189121613e92d565a32a482e62532639cd8a88","target":"record","created_at":"2026-05-18T00:50:31Z","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":"f53c1a535ab776f6aa9732eee68db647d05bec867b10c27a90c7fb19fa6fde90","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2014-11-24T20:26:48Z","title_canon_sha256":"9d48c66ccb1237aeb48e8b3acc9b068e458905ba0f7d87bbf96881b4d2ff45ca"},"schema_version":"1.0","source":{"id":"1411.6897","kind":"arxiv","version":4}},"canonical_sha256":"d3152770091d170c4bb291e07904fdc9758ab37521c7fdc90e5bfcfc8c4dfcf8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d3152770091d170c4bb291e07904fdc9758ab37521c7fdc90e5bfcfc8c4dfcf8","first_computed_at":"2026-05-18T00:50:31.355586Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:31.355586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4wudS9z+KIQIordPydSqb41mcSKMh1ECE0ip6hdA1cXBo523rbnTYZnnSwKl/upmLTpuUBgMJ0GiCA8DoWRTCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:31.356122Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.6897","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5e5c7b99121ba84ce9a35e29f2189121613e92d565a32a482e62532639cd8a88","sha256:b65a7931df2a425cdfd7e78bca4b2282439578352166b8c6c3cb5b5636f7ef2b"],"state_sha256":"ae3dc94e04e93958ffa09e65a36a06a4153878e6e328f18476e72dccde8a1d99"}