{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QF2ESIXYD4ERHNZJOXFW7G4IQO","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":"45693a911c07d1ebefeeb790117c5ad69c715238e6f0dfe32d7630de6327ff35","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-02-01T07:58:29Z","title_canon_sha256":"e5e7e13ff954e6bd64d3c53652ee4496d1f4d5a706ee4c9be6b52a3afc2e2344"},"schema_version":"1.0","source":{"id":"1502.00212","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.00212","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"arxiv_version","alias_value":"1502.00212v1","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.00212","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"pith_short_12","alias_value":"QF2ESIXYD4ER","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QF2ESIXYD4ERHNZJ","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QF2ESIXY","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:606ed3d5cf377d550f1bfab1060a6069e2d1efae114ec4f4f5211a48a96f1af6","target":"graph","created_at":"2026-05-18T02:28:06Z","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":"We consider a multi-user multiple-input multiple-output (MU-MIMO) system that uses orthogonal frequency division multiplexing (OFDM). Several receivers are developed for data detection of MU-MIMO transmissions where two users share the same OFDM time and frequency resources. The receivers have partial state information about the MU-MIMO transmission with each receiver having knowledge of the MU-MIMO channel, however the modulation constellation of the co-scheduled user is unknown. We propose a joint maximum likelihood (ML) modulation classification of the co-scheduled user and data detection r","authors_text":"Ahmad Gomaa, Djordje Tujkovic, Krishna S. Gomadam, Louay M.A. Jalloul, Mohammad M. Mansour","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-02-01T07:58:29Z","title":"Multi-User MIMO Receivers With Partial State Information"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.00212","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":"sha256:39088c0c508198ceeaf6e77215138a37519619b3f46710850e88ca2343faa928","target":"record","created_at":"2026-05-18T02:28:06Z","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":"45693a911c07d1ebefeeb790117c5ad69c715238e6f0dfe32d7630de6327ff35","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-02-01T07:58:29Z","title_canon_sha256":"e5e7e13ff954e6bd64d3c53652ee4496d1f4d5a706ee4c9be6b52a3afc2e2344"},"schema_version":"1.0","source":{"id":"1502.00212","kind":"arxiv","version":1}},"canonical_sha256":"81744922f81f0913b72975cb6f9b8883aece4fda3635188420235df54987f210","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"81744922f81f0913b72975cb6f9b8883aece4fda3635188420235df54987f210","first_computed_at":"2026-05-18T02:28:06.432488Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:28:06.432488Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rtd6IM0PkhEsX6HZDq90x23V83cmMEHhT7mXNc3kub/4YysGdF6LJjsmNqV2+MpyQmZEY5vctMaXpqSmxjuWAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:28:06.432926Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.00212","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:39088c0c508198ceeaf6e77215138a37519619b3f46710850e88ca2343faa928","sha256:606ed3d5cf377d550f1bfab1060a6069e2d1efae114ec4f4f5211a48a96f1af6"],"state_sha256":"84f67c6f134aab52ee7fb0c12f88b92ebe5b6194ca7e1e09b54532bf47ec2a88"}