{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:EXOS3CEPO23GR45JXWZQ3JXKF7","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":"6c2b82838ae095bb47de357befc2ef3fa3081814ce4214b682c35c20505cbff5","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2010-02-15T17:12:37Z","title_canon_sha256":"b3cf5f7d091245bee23231a868e79f9646806b2e9707a0e0bd28977cf1f41b25"},"schema_version":"1.0","source":{"id":"1002.2720","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.2720","created_at":"2026-05-18T03:58:51Z"},{"alias_kind":"arxiv_version","alias_value":"1002.2720v1","created_at":"2026-05-18T03:58:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.2720","created_at":"2026-05-18T03:58:51Z"},{"alias_kind":"pith_short_12","alias_value":"EXOS3CEPO23G","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"EXOS3CEPO23GR45J","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"EXOS3CEP","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:f3d7fb4220e5ed2df0efd74cb1fa132baede0d93c7fe1c91c9a875a2567eb32a","target":"graph","created_at":"2026-05-18T03:58:51Z","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":"We propose a blind interference alignment scheme for the vector broadcast channel where the transmitter is equipped with M antennas and there are K receivers, each equipped with a reconfigurable antenna capable of switching among M preset modes. Without any knowledge of the channel coefficient values at the transmitters and with only mild assumptions on the channel coherence structure we show that MK/M+K-1 degrees of freedom are achievable. The key to the blind interference alignment scheme is the ability of the receivers to switch between reconfigurable antenna modes to create short term chan","authors_text":"Chenwei Wang, Syed A. Jafar, Tiangao Gou","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2010-02-15T17:12:37Z","title":"Aiming Perfectly in the Dark - Blind Interference Alignment through Staggered Antenna Switching"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.2720","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:e46cce414c4c6319d8d2916286fca6e8eb915621c14fb532aa4d3722162bb3ec","target":"record","created_at":"2026-05-18T03:58:51Z","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":"6c2b82838ae095bb47de357befc2ef3fa3081814ce4214b682c35c20505cbff5","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2010-02-15T17:12:37Z","title_canon_sha256":"b3cf5f7d091245bee23231a868e79f9646806b2e9707a0e0bd28977cf1f41b25"},"schema_version":"1.0","source":{"id":"1002.2720","kind":"arxiv","version":1}},"canonical_sha256":"25dd2d888f76b668f3a9bdb30da6ea2fc3a62e0f04a7aa7d2c0792c08ceb1379","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"25dd2d888f76b668f3a9bdb30da6ea2fc3a62e0f04a7aa7d2c0792c08ceb1379","first_computed_at":"2026-05-18T03:58:51.827272Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:58:51.827272Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2hsCH2h/XWAIefetPTnFJ2zr5qcqdQKo6BwZz99Vo4HFtJcLGSCfzHIktK0p1Qh+pZdqQfMD0mbq8d7BR4cLDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:58:51.827854Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.2720","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e46cce414c4c6319d8d2916286fca6e8eb915621c14fb532aa4d3722162bb3ec","sha256:f3d7fb4220e5ed2df0efd74cb1fa132baede0d93c7fe1c91c9a875a2567eb32a"],"state_sha256":"b75183fb1bf9ed8c6a90089cf1dadc5beec3b6aaf91130d83d3c5db68d81560d"}