{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:AG2WBREGOT5CBRBUVDY6HQDIG7","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":"39f00494716a6dcc7f906183f02db66e2712d05ebff9e9f1a6745ef462b813df","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-10-30T08:05:50Z","title_canon_sha256":"3dd1ca4b04113628508c768a99f319ce3c54b93f3c91682e37eb781bf87c20b9"},"schema_version":"1.0","source":{"id":"1310.8057","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.8057","created_at":"2026-05-18T03:00:00Z"},{"alias_kind":"arxiv_version","alias_value":"1310.8057v2","created_at":"2026-05-18T03:00:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.8057","created_at":"2026-05-18T03:00:00Z"},{"alias_kind":"pith_short_12","alias_value":"AG2WBREGOT5C","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"AG2WBREGOT5CBRBU","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"AG2WBREG","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:c1992cfbf5ca0d6b82f4123faf0f47be4ae0648c1168ee5e11ec3e6ea7eeb3dc","target":"graph","created_at":"2026-05-18T03:00:00Z","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":"The performance and design of the novel single-RF-chain beam-space MIMO antenna concept is evaluated for the first time in the presence of the user. First, the variations of different performance parameters are evaluated when placing a beam-space MIMO antenna in close proximity to the user body in several typical operating scenarios. In addition to the typical degradation of conventional antennas in terms of radiation efficiency and impedance matching, it is observed that the user body corrupts the power balance and the orthogonality of the beam-space MIMO basis. However, capacity analyses sho","authors_text":"Halima Najibi, Julien Perruisseau-Carrier, Mohsen Yousefbeiki","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-10-30T08:05:50Z","title":"User Effects in Beam-Space MIMO"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.8057","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":"sha256:8c81a3fa7c35f64d67bddf2eb2ff65d735fdea09a4e1c662e1f6c4f5ed91edf2","target":"record","created_at":"2026-05-18T03:00:00Z","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":"39f00494716a6dcc7f906183f02db66e2712d05ebff9e9f1a6745ef462b813df","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-10-30T08:05:50Z","title_canon_sha256":"3dd1ca4b04113628508c768a99f319ce3c54b93f3c91682e37eb781bf87c20b9"},"schema_version":"1.0","source":{"id":"1310.8057","kind":"arxiv","version":2}},"canonical_sha256":"01b560c48674fa20c434a8f1e3c06837f29a852f49eed9613049f1b56b334baa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01b560c48674fa20c434a8f1e3c06837f29a852f49eed9613049f1b56b334baa","first_computed_at":"2026-05-18T03:00:00.479195Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:00:00.479195Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"x031NyO6sjyPlMzwiJwE/7KsCTNIPI46W3i9cC4AThA6KFfbTU3SiKHUWkqon/xoDpcsgTYMOASdrfyg3SvDAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:00:00.480096Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.8057","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8c81a3fa7c35f64d67bddf2eb2ff65d735fdea09a4e1c662e1f6c4f5ed91edf2","sha256:c1992cfbf5ca0d6b82f4123faf0f47be4ae0648c1168ee5e11ec3e6ea7eeb3dc"],"state_sha256":"042088b13847ec02d8ffe48d0ccba2dc58b2003db97620b5b2c363ccda56d5f1"}