{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:4BA2W5UG6VXKHSATRZ4SMPDNNQ","short_pith_number":"pith:4BA2W5UG","canonical_record":{"source":{"id":"1308.3772","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-08-17T11:00:08Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"da319a12d3ac66540c3dae2c9f41ebd70964fca8d8e67d0265293f60dc99d25f","abstract_canon_sha256":"ac1a77bc5bba1720e457f899cd46a8d552a460d4db25572363cc2597d6a4bd34"},"schema_version":"1.0"},"canonical_sha256":"e041ab7686f56ea3c8138e79263c6d6c145e832b3e44cee74b86dfb4945d7db0","source":{"kind":"arxiv","id":"1308.3772","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.3772","created_at":"2026-05-18T03:15:42Z"},{"alias_kind":"arxiv_version","alias_value":"1308.3772v1","created_at":"2026-05-18T03:15:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.3772","created_at":"2026-05-18T03:15:42Z"},{"alias_kind":"pith_short_12","alias_value":"4BA2W5UG6VXK","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"4BA2W5UG6VXKHSAT","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"4BA2W5UG","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:4BA2W5UG6VXKHSATRZ4SMPDNNQ","target":"record","payload":{"canonical_record":{"source":{"id":"1308.3772","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-08-17T11:00:08Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"da319a12d3ac66540c3dae2c9f41ebd70964fca8d8e67d0265293f60dc99d25f","abstract_canon_sha256":"ac1a77bc5bba1720e457f899cd46a8d552a460d4db25572363cc2597d6a4bd34"},"schema_version":"1.0"},"canonical_sha256":"e041ab7686f56ea3c8138e79263c6d6c145e832b3e44cee74b86dfb4945d7db0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:15:42.606060Z","signature_b64":"yuP1Q31V1RIayR794mBGVN7ar7XwMZS5nH/ksRdwpbyZTBwNCns8aCpWDpr1zYUpY8rkr9H/y+FlikCCOJRPDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e041ab7686f56ea3c8138e79263c6d6c145e832b3e44cee74b86dfb4945d7db0","last_reissued_at":"2026-05-18T03:15:42.605447Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:15:42.605447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.3772","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":"2026-05-18T03:15:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1KNYDT42r/aB9b/ZvduM4dggBdeWEOLGNFSvzcnCJJurupeRo4rnR+Cg0aL7k6pOAnlphP0gu1qov7LKM6vzDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T22:22:56.638049Z"},"content_sha256":"457bdc0832f7cae47ee8bb08b3f53a9a2657184bf46dac97a8bf7e9d38e1197f","schema_version":"1.0","event_id":"sha256:457bdc0832f7cae47ee8bb08b3f53a9a2657184bf46dac97a8bf7e9d38e1197f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:4BA2W5UG6VXKHSATRZ4SMPDNNQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Joint Phase Noise Estimation and Data Detection in Coded MIMO Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Alexander G. Amat, Ali A. Nasir, Arif O. Isikman, Hani Mehrpouyan, Rodney. A. Kennedy","submitted_at":"2013-08-17T11:00:08Z","abstract_excerpt":"In this paper, the problem of joint oscillator phase noise (PHN) estimation and data detection for multi-input multi-output (MIMO) systems using bit-interleaved coded modulation (BICM) is analyzed. A new MIMO receiver that iterates between the estimator and the detector, based on the expectation-maximization (EM) framework, is proposed. It is shown that at high signal-to-noise ratios, a maximum a posteriori estimator (MAP) can be used to carry out the maximization step of the EM algorithm. Moreover, to reduce the computational complexity of the proposed EM algorithm, a soft decision-directed e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.3772","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":"2026-05-18T03:15:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"enCXq+jU8xH0/X6OQG8+z3W9fgVjfXqDc+oUuRYHy3YbEXMWtwxm5jY3dUwOd89GgP4kSPHYWi+8J1qkoCSJDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T22:22:56.638496Z"},"content_sha256":"901f6f834bfe75fb18079535a4b65b652a47f7bfe4d4298eb7da0154ddf2425c","schema_version":"1.0","event_id":"sha256:901f6f834bfe75fb18079535a4b65b652a47f7bfe4d4298eb7da0154ddf2425c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4BA2W5UG6VXKHSATRZ4SMPDNNQ/bundle.json","state_url":"https://pith.science/pith/4BA2W5UG6VXKHSATRZ4SMPDNNQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4BA2W5UG6VXKHSATRZ4SMPDNNQ/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":"2026-06-23T22:22:56Z","links":{"resolver":"https://pith.science/pith/4BA2W5UG6VXKHSATRZ4SMPDNNQ","bundle":"https://pith.science/pith/4BA2W5UG6VXKHSATRZ4SMPDNNQ/bundle.json","state":"https://pith.science/pith/4BA2W5UG6VXKHSATRZ4SMPDNNQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4BA2W5UG6VXKHSATRZ4SMPDNNQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:4BA2W5UG6VXKHSATRZ4SMPDNNQ","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":"ac1a77bc5bba1720e457f899cd46a8d552a460d4db25572363cc2597d6a4bd34","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-08-17T11:00:08Z","title_canon_sha256":"da319a12d3ac66540c3dae2c9f41ebd70964fca8d8e67d0265293f60dc99d25f"},"schema_version":"1.0","source":{"id":"1308.3772","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.3772","created_at":"2026-05-18T03:15:42Z"},{"alias_kind":"arxiv_version","alias_value":"1308.3772v1","created_at":"2026-05-18T03:15:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.3772","created_at":"2026-05-18T03:15:42Z"},{"alias_kind":"pith_short_12","alias_value":"4BA2W5UG6VXK","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"4BA2W5UG6VXKHSAT","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"4BA2W5UG","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:901f6f834bfe75fb18079535a4b65b652a47f7bfe4d4298eb7da0154ddf2425c","target":"graph","created_at":"2026-05-18T03:15:42Z","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, the problem of joint oscillator phase noise (PHN) estimation and data detection for multi-input multi-output (MIMO) systems using bit-interleaved coded modulation (BICM) is analyzed. A new MIMO receiver that iterates between the estimator and the detector, based on the expectation-maximization (EM) framework, is proposed. It is shown that at high signal-to-noise ratios, a maximum a posteriori estimator (MAP) can be used to carry out the maximization step of the EM algorithm. Moreover, to reduce the computational complexity of the proposed EM algorithm, a soft decision-directed e","authors_text":"Alexander G. Amat, Ali A. Nasir, Arif O. Isikman, Hani Mehrpouyan, Rodney. A. Kennedy","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-08-17T11:00:08Z","title":"Joint Phase Noise Estimation and Data Detection in Coded MIMO Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.3772","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":"sha256:457bdc0832f7cae47ee8bb08b3f53a9a2657184bf46dac97a8bf7e9d38e1197f","target":"record","created_at":"2026-05-18T03:15:42Z","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":"ac1a77bc5bba1720e457f899cd46a8d552a460d4db25572363cc2597d6a4bd34","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-08-17T11:00:08Z","title_canon_sha256":"da319a12d3ac66540c3dae2c9f41ebd70964fca8d8e67d0265293f60dc99d25f"},"schema_version":"1.0","source":{"id":"1308.3772","kind":"arxiv","version":1}},"canonical_sha256":"e041ab7686f56ea3c8138e79263c6d6c145e832b3e44cee74b86dfb4945d7db0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e041ab7686f56ea3c8138e79263c6d6c145e832b3e44cee74b86dfb4945d7db0","first_computed_at":"2026-05-18T03:15:42.605447Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:15:42.605447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yuP1Q31V1RIayR794mBGVN7ar7XwMZS5nH/ksRdwpbyZTBwNCns8aCpWDpr1zYUpY8rkr9H/y+FlikCCOJRPDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:15:42.606060Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.3772","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:457bdc0832f7cae47ee8bb08b3f53a9a2657184bf46dac97a8bf7e9d38e1197f","sha256:901f6f834bfe75fb18079535a4b65b652a47f7bfe4d4298eb7da0154ddf2425c"],"state_sha256":"bbf08c7716e02dbf6285d4c5592d08af607ba11f4269ec82fc9c29a54a4050d3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q8ffkcdlZe/1KcIkTziRubwaLZgh/30AC3PWxKBMJ4zcn/9V6iChBtG9UG3wBHhMWq0ShTfQ4BAiqpa4BNESCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T22:22:56.640369Z","bundle_sha256":"fcea155552489843f338b54e7c8660a90e04e6107a0727bd128ecae3a39a9664"}}