{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:TFDTIZH2LT3MDTERZKJH2VFUWC","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":"e62aaeb02e966f761b38ab763c91d2aa8b1c62d13608d0dbc34bf92f0432a44d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-03-20T15:07:33Z","title_canon_sha256":"e67753d5ef0cfb01b0897c965d1a13c9c5718e81bfa60d4891b64af9ad1f3c3c"},"schema_version":"1.0","source":{"id":"2003.09317","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2003.09317","created_at":"2026-07-05T01:38:17Z"},{"alias_kind":"arxiv_version","alias_value":"2003.09317v1","created_at":"2026-07-05T01:38:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2003.09317","created_at":"2026-07-05T01:38:17Z"},{"alias_kind":"pith_short_12","alias_value":"TFDTIZH2LT3M","created_at":"2026-07-05T01:38:17Z"},{"alias_kind":"pith_short_16","alias_value":"TFDTIZH2LT3MDTER","created_at":"2026-07-05T01:38:17Z"},{"alias_kind":"pith_short_8","alias_value":"TFDTIZH2","created_at":"2026-07-05T01:38:17Z"}],"graph_snapshots":[{"event_id":"sha256:a6664051ad9f59207cff2bbab30dff6500c1dee7fd0ab5cf91f1b39466fe0bc4","target":"graph","created_at":"2026-07-05T01:38:17Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2003.09317/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we propose a new algorithm of iterative least squared (LS) channel estimation for 64 antennas Massive Multiple Input, Multiple Output (MIMO) turbo-receiver. The algorithm employs log-likelihood ratios (LLR) of low-density parity-check (LDPC) decoder and minimum mean square error (MMSE) estimator to achieve soft data symbols. These soft data symbols are further MMSE-weighted again and combined with pilot symbols to achieve a modified LS channel estimate. The modified LS estimate is employed by the same channel estimation unit to enhance turbo-receiver performance via channel re-e","authors_text":"Alexander Osinsky, Andrey Ivanov, Dmitry Lakontsev, Dmitry Yarotsky, Roman Bychkov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-03-20T15:07:33Z","title":"Data-Aided LS Channel Estimation in Massive MIMO Turbo-Receiver"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2003.09317","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":"sha256:21b08912aa02f101bd696a70e7115408dbf0de24f0e7f00560f96095de289a5f","target":"record","created_at":"2026-07-05T01:38:17Z","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":"e62aaeb02e966f761b38ab763c91d2aa8b1c62d13608d0dbc34bf92f0432a44d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-03-20T15:07:33Z","title_canon_sha256":"e67753d5ef0cfb01b0897c965d1a13c9c5718e81bfa60d4891b64af9ad1f3c3c"},"schema_version":"1.0","source":{"id":"2003.09317","kind":"arxiv","version":1}},"canonical_sha256":"99473464fa5cf6c1cc91ca927d54b4b0971010a67cd7e7e40d0bd295ccd5eabb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99473464fa5cf6c1cc91ca927d54b4b0971010a67cd7e7e40d0bd295ccd5eabb","first_computed_at":"2026-07-05T01:38:17.486123Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:38:17.486123Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0LpwydQnne/Pon7UHzN6Hn57peVttl5x4As9qyrPLAtb5aHqWtzQyU5moA9hHDQr4P8cXJfALulxIrk5sLTBDg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:38:17.486548Z","signed_message":"canonical_sha256_bytes"},"source_id":"2003.09317","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:21b08912aa02f101bd696a70e7115408dbf0de24f0e7f00560f96095de289a5f","sha256:a6664051ad9f59207cff2bbab30dff6500c1dee7fd0ab5cf91f1b39466fe0bc4"],"state_sha256":"b8e3efb702aae2b840d0fe328a3369204d9a2c1b51fd52b10ff70dd008429ee5"}