{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7AZ3LWC3S4IYPQKK56TJGPQVFT","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":"de64c38bcbc1d0553e93b7074ed0fee0a332c3fe65cc3b607ad12aae095405f7","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-07-21T02:48:26Z","title_canon_sha256":"9e45af4750fa29ed13359e5cb035cd572e57b13d6b4ce226f75b8f8604a98fdd"},"schema_version":"1.0","source":{"id":"1807.08071","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.08071","created_at":"2026-05-17T23:56:14Z"},{"alias_kind":"arxiv_version","alias_value":"1807.08071v2","created_at":"2026-05-17T23:56:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.08071","created_at":"2026-05-17T23:56:14Z"},{"alias_kind":"pith_short_12","alias_value":"7AZ3LWC3S4IY","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7AZ3LWC3S4IYPQKK","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7AZ3LWC3","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:afb5910fee6181e078b1695b153f4c26e74bfee69c05bdcf1edd01602989d733","target":"graph","created_at":"2026-05-17T23:56:14Z","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":"Massive multiple-input--multiple-output (MIMO) systems can suffer from coherent intercell interference due to the phenomenon of pilot contamination. This paper investigates a two-layer decoding method that mitigates both coherent and non-coherent interference in multi-cell Massive MIMO. To this end, each base station (BS) first estimates the channels to intra-cell users using either minimum mean-squared error (MMSE) or element-wise MMSE (EW-MMSE) estimation based on uplink pilots. The estimates are used for local decoding on each BS followed by a second decoding layer where the BSs cooperate t","authors_text":"Christopher Moll\\'en, Emil Bj\\\"ornson, Trinh Van Chien","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-07-21T02:48:26Z","title":"Large-Scale-Fading Decoding in Cellular Massive MIMO Systems with Spatially Correlated Channels"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.08071","kind":"arxiv","version":2},"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:b2bd749a341c8284103c8e0e061d6d364ea7b094f7b7c086c66f6a4581dc0a7d","target":"record","created_at":"2026-05-17T23:56:14Z","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":"de64c38bcbc1d0553e93b7074ed0fee0a332c3fe65cc3b607ad12aae095405f7","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-07-21T02:48:26Z","title_canon_sha256":"9e45af4750fa29ed13359e5cb035cd572e57b13d6b4ce226f75b8f8604a98fdd"},"schema_version":"1.0","source":{"id":"1807.08071","kind":"arxiv","version":2}},"canonical_sha256":"f833b5d85b971187c14aefa6933e152cf95936e6341d06e3ec9b677aa2aa7eba","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f833b5d85b971187c14aefa6933e152cf95936e6341d06e3ec9b677aa2aa7eba","first_computed_at":"2026-05-17T23:56:14.895258Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:14.895258Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wzFcVftBXXK/3aWjRG4WOUIADTKpg8bTJ5pSB9MJAmXW3FaJH8zGiuLM5cTrn1VOy0N3jF0/Ur4CR98Iq/D+Dw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:14.895818Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.08071","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b2bd749a341c8284103c8e0e061d6d364ea7b094f7b7c086c66f6a4581dc0a7d","sha256:afb5910fee6181e078b1695b153f4c26e74bfee69c05bdcf1edd01602989d733"],"state_sha256":"24dfa3a48995143c746af8e3eba88941f872be4758c9992326373e0acaba0386"}