{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:GWDZTVZPDPZMRJFYAE6JUQH5XO","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":"acbf3758e4ffee511eda128d0dccabae88d9e8d7c1c720d4c220fa00289e8662","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OH","submitted_at":"2010-05-26T17:54:42Z","title_canon_sha256":"69bb1fd777f46a3697ff2b91ea8f41e6ca01f0f9f3711a9bdd6ad5dcb13d0931"},"schema_version":"1.0","source":{"id":"1005.4895","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.4895","created_at":"2026-05-18T00:58:44Z"},{"alias_kind":"arxiv_version","alias_value":"1005.4895v1","created_at":"2026-05-18T00:58:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.4895","created_at":"2026-05-18T00:58:44Z"},{"alias_kind":"pith_short_12","alias_value":"GWDZTVZPDPZM","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"GWDZTVZPDPZMRJFY","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"GWDZTVZP","created_at":"2026-05-18T12:26:07Z"}],"graph_snapshots":[{"event_id":"sha256:0ed2a936eba75f5256558d034e268e26c2aa0e222a647fd21d8f5658f48fd350","target":"graph","created_at":"2026-05-18T00:58:44Z","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":"The QR Decomposition (QRD) of communication channel matrices is a fundamental prerequisite to several detection schemes in Multiple-Input Multiple-Output (MIMO) communication systems. Herein, the main feature of the QRD is to transform the non-causal system into a causal system, where consequently efficient detection algorithms based on the Successive Interference Cancellation (SIC) or Sphere Decoder (SD) become possible. Also, QRD can be used as a light but efficient antenna selection scheme. In this paper, we address the study of the QRD methods and compare their efficiency in terms of compu","authors_text":"Fabienne Nouvel, KyungHi Chang, Manar Mohaisen, Sebastien Aubert","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OH","submitted_at":"2010-05-26T17:54:42Z","title":"Parallel QR decomposition in LTE-A systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.4895","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":"sha256:8cd2ab937bf9a7c1ae1a20989e98e19e8b27a8c51bed7a0d64c162bbf9e780cc","target":"record","created_at":"2026-05-18T00:58:44Z","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":"acbf3758e4ffee511eda128d0dccabae88d9e8d7c1c720d4c220fa00289e8662","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OH","submitted_at":"2010-05-26T17:54:42Z","title_canon_sha256":"69bb1fd777f46a3697ff2b91ea8f41e6ca01f0f9f3711a9bdd6ad5dcb13d0931"},"schema_version":"1.0","source":{"id":"1005.4895","kind":"arxiv","version":1}},"canonical_sha256":"358799d72f1bf2c8a4b8013c9a40fdbb93c21f31b9675fb716d9e4dc2eb9755e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"358799d72f1bf2c8a4b8013c9a40fdbb93c21f31b9675fb716d9e4dc2eb9755e","first_computed_at":"2026-05-18T00:58:44.119567Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:58:44.119567Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OPZvKais0AyeXNFvjiCbTTc4KP4owgDYTMNkxkarEXCjyDnAEY7jQmyJAJa44tazTHKpFIpO2W90JA5JmvV0CA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:58:44.120031Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.4895","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8cd2ab937bf9a7c1ae1a20989e98e19e8b27a8c51bed7a0d64c162bbf9e780cc","sha256:0ed2a936eba75f5256558d034e268e26c2aa0e222a647fd21d8f5658f48fd350"],"state_sha256":"94c27de544c6e6bbde1b6355795625539ecaa1967be893800a20ec164c6171aa"}