{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:EQYUGBAADL4QYE352R6N7U4KSZ","short_pith_number":"pith:EQYUGBAA","canonical_record":{"source":{"id":"1410.5510","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2014-10-21T01:02:24Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"2f9655b098ae634bf922c2ce070a161bc52533a6c194c86e325c6628b515b5bb","abstract_canon_sha256":"1a01425c107926b8a8404764ba63daefb90d435ef8b3adc56fb146710ebf6af7"},"schema_version":"1.0"},"canonical_sha256":"24314304001af90c137dd47cdfd38a9652b5296fb497990eeba31f011ab048b1","source":{"kind":"arxiv","id":"1410.5510","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.5510","created_at":"2026-05-18T02:39:39Z"},{"alias_kind":"arxiv_version","alias_value":"1410.5510v1","created_at":"2026-05-18T02:39:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.5510","created_at":"2026-05-18T02:39:39Z"},{"alias_kind":"pith_short_12","alias_value":"EQYUGBAADL4Q","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"EQYUGBAADL4QYE35","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"EQYUGBAA","created_at":"2026-05-18T12:28:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:EQYUGBAADL4QYE352R6N7U4KSZ","target":"record","payload":{"canonical_record":{"source":{"id":"1410.5510","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2014-10-21T01:02:24Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"2f9655b098ae634bf922c2ce070a161bc52533a6c194c86e325c6628b515b5bb","abstract_canon_sha256":"1a01425c107926b8a8404764ba63daefb90d435ef8b3adc56fb146710ebf6af7"},"schema_version":"1.0"},"canonical_sha256":"24314304001af90c137dd47cdfd38a9652b5296fb497990eeba31f011ab048b1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:39:39.682601Z","signature_b64":"Eucims4zyj+PbScfjk2UAqmsiOFTh+DnVPL9TMWnfYV3gBb6AogwCtA+xpTKcbDP6DL0kibSxQ9hDUqIndDaAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24314304001af90c137dd47cdfd38a9652b5296fb497990eeba31f011ab048b1","last_reissued_at":"2026-05-18T02:39:39.682162Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:39:39.682162Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1410.5510","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:39:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"APC67nN9XXqJ7P9x+uOrvoatOV9qy9D4oA5ic+BU5ei+pQzVuA8ahQM34Izyr5X4F22hd9y7BFqZVBE529khDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:10:24.023944Z"},"content_sha256":"0faa7049563dce248c90135ca35828798dc46b0891a2f83d53e056db260c67f8","schema_version":"1.0","event_id":"sha256:0faa7049563dce248c90135ca35828798dc46b0891a2f83d53e056db260c67f8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:EQYUGBAADL4QYE352R6N7U4KSZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Blind Adaptive MIMO Receivers for CDMA Systems with Space-Time Block-Codes and Low-Cost Algorithms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"R. C. de Lamare, R. Sampaio-Neto","submitted_at":"2014-10-21T01:02:24Z","abstract_excerpt":"In this paper we present low-complexity blind multi-input multi-output (MIMO) adaptive linear multiuser receivers for direct sequence code division multiple access (DS-CDMA) systems using multiple transmit antennas and space-time block codes (STBC) in multipath channels. A space-time code-constrained constant modulus (CCM) design criterion based on constrained optimization techniques and low-complexity stochastic gradient (SG) adaptive algorithms are developed for estimating the parameters of the space-time linear receivers. The receivers are designed by exploiting the unique structure imposed"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.5510","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:39:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"osT4eDpWfM/B7/c0SdhN2OFFG2zZmUzr12DrFlFAr4sl/H3DZn6MfiEJhw9PGDdSaMMlsGsbTMNvIHhmK7VlCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:10:24.024796Z"},"content_sha256":"fde17e5522788630f92b84dd3709a78132c3ee62e77a5ca54f0cbf3616acc581","schema_version":"1.0","event_id":"sha256:fde17e5522788630f92b84dd3709a78132c3ee62e77a5ca54f0cbf3616acc581"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EQYUGBAADL4QYE352R6N7U4KSZ/bundle.json","state_url":"https://pith.science/pith/EQYUGBAADL4QYE352R6N7U4KSZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EQYUGBAADL4QYE352R6N7U4KSZ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-09T08:10:24Z","links":{"resolver":"https://pith.science/pith/EQYUGBAADL4QYE352R6N7U4KSZ","bundle":"https://pith.science/pith/EQYUGBAADL4QYE352R6N7U4KSZ/bundle.json","state":"https://pith.science/pith/EQYUGBAADL4QYE352R6N7U4KSZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EQYUGBAADL4QYE352R6N7U4KSZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:EQYUGBAADL4QYE352R6N7U4KSZ","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":"1a01425c107926b8a8404764ba63daefb90d435ef8b3adc56fb146710ebf6af7","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2014-10-21T01:02:24Z","title_canon_sha256":"2f9655b098ae634bf922c2ce070a161bc52533a6c194c86e325c6628b515b5bb"},"schema_version":"1.0","source":{"id":"1410.5510","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.5510","created_at":"2026-05-18T02:39:39Z"},{"alias_kind":"arxiv_version","alias_value":"1410.5510v1","created_at":"2026-05-18T02:39:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.5510","created_at":"2026-05-18T02:39:39Z"},{"alias_kind":"pith_short_12","alias_value":"EQYUGBAADL4Q","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"EQYUGBAADL4QYE35","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"EQYUGBAA","created_at":"2026-05-18T12:28:28Z"}],"graph_snapshots":[{"event_id":"sha256:fde17e5522788630f92b84dd3709a78132c3ee62e77a5ca54f0cbf3616acc581","target":"graph","created_at":"2026-05-18T02:39:39Z","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":"In this paper we present low-complexity blind multi-input multi-output (MIMO) adaptive linear multiuser receivers for direct sequence code division multiple access (DS-CDMA) systems using multiple transmit antennas and space-time block codes (STBC) in multipath channels. A space-time code-constrained constant modulus (CCM) design criterion based on constrained optimization techniques and low-complexity stochastic gradient (SG) adaptive algorithms are developed for estimating the parameters of the space-time linear receivers. The receivers are designed by exploiting the unique structure imposed","authors_text":"R. C. de Lamare, R. Sampaio-Neto","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2014-10-21T01:02:24Z","title":"Blind Adaptive MIMO Receivers for CDMA Systems with Space-Time Block-Codes and Low-Cost Algorithms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.5510","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":"sha256:0faa7049563dce248c90135ca35828798dc46b0891a2f83d53e056db260c67f8","target":"record","created_at":"2026-05-18T02:39:39Z","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":"1a01425c107926b8a8404764ba63daefb90d435ef8b3adc56fb146710ebf6af7","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2014-10-21T01:02:24Z","title_canon_sha256":"2f9655b098ae634bf922c2ce070a161bc52533a6c194c86e325c6628b515b5bb"},"schema_version":"1.0","source":{"id":"1410.5510","kind":"arxiv","version":1}},"canonical_sha256":"24314304001af90c137dd47cdfd38a9652b5296fb497990eeba31f011ab048b1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24314304001af90c137dd47cdfd38a9652b5296fb497990eeba31f011ab048b1","first_computed_at":"2026-05-18T02:39:39.682162Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:39:39.682162Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Eucims4zyj+PbScfjk2UAqmsiOFTh+DnVPL9TMWnfYV3gBb6AogwCtA+xpTKcbDP6DL0kibSxQ9hDUqIndDaAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:39:39.682601Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.5510","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0faa7049563dce248c90135ca35828798dc46b0891a2f83d53e056db260c67f8","sha256:fde17e5522788630f92b84dd3709a78132c3ee62e77a5ca54f0cbf3616acc581"],"state_sha256":"9b3208721441a68f87c71b74f785fb711cf5d3b0e9645dfa7f3a33a993d1b71b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yyYbJVNC7wQUEo+RkoLkg7kp4SkgoAFmY9yePe4FWTMERO6J+sj9ZWK80MZ0syEPD3GP/vHcGsJJ+HM/EHPjAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T08:10:24.029347Z","bundle_sha256":"4af35bae56ec25ee10fbc260d08dd5cbd741b7547b97956b170e788093a7aa35"}}