{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:5YMIMXQMOL7BC2E7G3TBLXYHUT","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":"e9edb583e2cc306da3917a690ad2b2dbb72965f709acf1729255ce38c790ca2b","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-03-21T07:56:10Z","title_canon_sha256":"eda4b67c987f09b69da4c00aa41b0f5b0429f55ce5a40194e5a32ebbf91e8393"},"schema_version":"1.0","source":{"id":"1703.07082","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.07082","created_at":"2026-05-18T00:48:11Z"},{"alias_kind":"arxiv_version","alias_value":"1703.07082v1","created_at":"2026-05-18T00:48:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.07082","created_at":"2026-05-18T00:48:11Z"},{"alias_kind":"pith_short_12","alias_value":"5YMIMXQMOL7B","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"5YMIMXQMOL7BC2E7","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"5YMIMXQM","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:7625515a8742d4fb27b96ea4d92356c74b7e66eb79ea09c2ab143e5295f39e7a","target":"graph","created_at":"2026-05-18T00:48:11Z","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 addresses a simplified frequency offset estimator for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems over frequency selective fading channels. By exploiting the good correlation property of the training sequences, which are constructed from the Chu sequence, carrier frequency offset (CFO) estimation is obtained through factor decomposition for the derivative of the cost function with great complexity reduction. The mean-squared error (MSE) of the CFO estimation is derived to optimize the key parameter of the simplified estimator and a","authors_text":"Hlaing Minn, Xiaohu You, Xiqi Gao, Yanxiang Jiang","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-03-21T07:56:10Z","title":"Simplified Frequency Offset Estimation for MIMO OFDM Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.07082","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:dd554def4cd1bd5e4300db82db7a41513a15612d8703785101f6f623a9b08f51","target":"record","created_at":"2026-05-18T00:48:11Z","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":"e9edb583e2cc306da3917a690ad2b2dbb72965f709acf1729255ce38c790ca2b","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-03-21T07:56:10Z","title_canon_sha256":"eda4b67c987f09b69da4c00aa41b0f5b0429f55ce5a40194e5a32ebbf91e8393"},"schema_version":"1.0","source":{"id":"1703.07082","kind":"arxiv","version":1}},"canonical_sha256":"ee18865e0c72fe11689f36e615df07a4c851fae17f92d86dde9aaefc00852287","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ee18865e0c72fe11689f36e615df07a4c851fae17f92d86dde9aaefc00852287","first_computed_at":"2026-05-18T00:48:11.390939Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:48:11.390939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gi1hpGJlPeweJqXiEumYX6c/vTvzUx2zNQezjVJPklG0rkBmOeXvQce8h5Raxz382pkzxUTk1fpSUiBQFU6pDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:48:11.391521Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.07082","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dd554def4cd1bd5e4300db82db7a41513a15612d8703785101f6f623a9b08f51","sha256:7625515a8742d4fb27b96ea4d92356c74b7e66eb79ea09c2ab143e5295f39e7a"],"state_sha256":"7e704137923ca5a17b50dc91d669dc4c5aa2385170046e1be82fbb54eeb758c5"}