{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:5LYFHPDKUEZXZSBIW4TWKXVUII","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":"73c4acdda1fe2793491f1a6697a6a9034cfb8e8bece270aff685f063126b6e13","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-04-29T02:11:05Z","title_canon_sha256":"8c669116091543851b0c268f3798bf46f0bf64d768ceff67006eb20f2a8955f5"},"schema_version":"1.0","source":{"id":"1304.7552","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.7552","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"arxiv_version","alias_value":"1304.7552v1","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.7552","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"pith_short_12","alias_value":"5LYFHPDKUEZX","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_16","alias_value":"5LYFHPDKUEZXZSBI","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_8","alias_value":"5LYFHPDK","created_at":"2026-05-18T12:27:34Z"}],"graph_snapshots":[{"event_id":"sha256:52d59e5696153c98ab8a30f8f16d76230888785a6433f19e5faab30583b5352f","target":"graph","created_at":"2026-05-18T03:26:53Z","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 presents a novel adaptive reduced-rank multi-input-multi-output (MIMO) decision feedback equalization structure based on joint iterative optimization of adaptive estimators. The novel reduced-rank equalization structure consists of a joint iterative optimization of two equalization stages, namely, a projection matrix that performs dimensionality reduction and a reduced-rank estimator that retrieves the desired transmitted symbol. The proposed reduced-rank structure is followed by a decision feedback scheme that is responsible for cancelling the inter-antenna interference caused by t","authors_text":"Are Hjorungnes, Raimundo Sampaio-Neto, Rodrigo C. de Lamare","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-04-29T02:11:05Z","title":"Adaptive Decision Feedback Reduced-Rank Equalization Based on Joint Iterative Optimization of Adaptive Estimation Algorithms for Multi-Antenna Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.7552","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":"sha256:37cd16161a048276b20f602bcbf2026d497bda5fa150c0700be2c65099dcccd2","target":"record","created_at":"2026-05-18T03:26:53Z","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":"73c4acdda1fe2793491f1a6697a6a9034cfb8e8bece270aff685f063126b6e13","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-04-29T02:11:05Z","title_canon_sha256":"8c669116091543851b0c268f3798bf46f0bf64d768ceff67006eb20f2a8955f5"},"schema_version":"1.0","source":{"id":"1304.7552","kind":"arxiv","version":1}},"canonical_sha256":"eaf053bc6aa1337cc828b727655eb4423c10b59888aa8815b8edd0da50d99b1b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eaf053bc6aa1337cc828b727655eb4423c10b59888aa8815b8edd0da50d99b1b","first_computed_at":"2026-05-18T03:26:53.683688Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:26:53.683688Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7w1Hk1Baug0fRtceNiltDG/hJvIwuNs0K3TZszhfbKnxl4q5jTQ0XHUiTiWJlA274WTdcbZK6YmUvT6RaC/QCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:26:53.684365Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.7552","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:37cd16161a048276b20f602bcbf2026d497bda5fa150c0700be2c65099dcccd2","sha256:52d59e5696153c98ab8a30f8f16d76230888785a6433f19e5faab30583b5352f"],"state_sha256":"37547a3c8b7399c1624b7dbed43b2f53032325852b0b0e3f3c0445888f042c3d"}