{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:3V7IB64PYKWEIUCTRDUWN2HPIZ","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":"3a00d0dc6915534bde0359c621bf4cdfdb4dce24da48cc35c3cf9a9841a62572","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-05-22T02:40:33Z","title_canon_sha256":"43ab8da4811762f5d9be1b4594ae01451c0d4b894df76945365e69f0ad78ebe6"},"schema_version":"1.0","source":{"id":"1705.07540","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.07540","created_at":"2026-05-18T00:44:05Z"},{"alias_kind":"arxiv_version","alias_value":"1705.07540v1","created_at":"2026-05-18T00:44:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.07540","created_at":"2026-05-18T00:44:05Z"},{"alias_kind":"pith_short_12","alias_value":"3V7IB64PYKWE","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_16","alias_value":"3V7IB64PYKWEIUCT","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_8","alias_value":"3V7IB64P","created_at":"2026-05-18T12:30:58Z"}],"graph_snapshots":[{"event_id":"sha256:daeb3ebbbb73047aa0c1df0959bf09030686c47a8b562476486b320f851cf1b0","target":"graph","created_at":"2026-05-18T00:44:05Z","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 MIMO has rapidly gained popularity as a technology crucial to the capacity advances required for 5G wireless systems. Since its theoretical conception six years ago, research activity has grown exponentially, and there is now a developing industrial interest to commercialise the technology. For this to happen effectively, we believe it is crucial that further pragmatic research is conducted with a view to establish how reality differs from theoretical ideals. This paper presents an overview of the massive MIMO research activities occurring within the Communication Systems & Networks Gr","authors_text":"Andrew Nix, Angela Doufexi, Benny Chitambira, Evangelos Mellios, Henry Brice, Mark Beach, Paul Harris, Simon Armour, Wael Boukley Hasan","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-05-22T02:40:33Z","title":"An Overview of Massive MIMO Research at the University of Bristol"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.07540","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":"sha256:1590a1c3fd2f148e53446dc3b99c9e83d6e0d614d9ec645ff141eab88909d44d","target":"record","created_at":"2026-05-18T00:44:05Z","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":"3a00d0dc6915534bde0359c621bf4cdfdb4dce24da48cc35c3cf9a9841a62572","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-05-22T02:40:33Z","title_canon_sha256":"43ab8da4811762f5d9be1b4594ae01451c0d4b894df76945365e69f0ad78ebe6"},"schema_version":"1.0","source":{"id":"1705.07540","kind":"arxiv","version":1}},"canonical_sha256":"dd7e80fb8fc2ac44505388e966e8ef4671f0afe4d3f60dad30e1948e15b3749f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dd7e80fb8fc2ac44505388e966e8ef4671f0afe4d3f60dad30e1948e15b3749f","first_computed_at":"2026-05-18T00:44:05.266524Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:44:05.266524Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MHFeNOVbNRgXhSF+r8lA/pjLG7wMZOVRj4/UFTPY2RyE5HB3biKMcLcPYjQQu2BuTcMPUmLJ0uLxtSeglji4BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:44:05.267087Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.07540","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1590a1c3fd2f148e53446dc3b99c9e83d6e0d614d9ec645ff141eab88909d44d","sha256:daeb3ebbbb73047aa0c1df0959bf09030686c47a8b562476486b320f851cf1b0"],"state_sha256":"005912097ed80e87dedc282dc79ae80c0b735dc4a826c6cb96376666accb9559"}