{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:NJDXILXCDE6XDBFJN5THVVHQDD","short_pith_number":"pith:NJDXILXC","canonical_record":{"source":{"id":"2606.03311","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2026-06-02T08:24:18Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"a656cfb9bed0b5b35e04938b8ed56cf00a575adb4cad5e0c7be21cefb89570a5","abstract_canon_sha256":"fb46cdb7253d943e70e1799082ba585ca6f255bc36415d864ef7a9dd5202893c"},"schema_version":"1.0"},"canonical_sha256":"6a47742ee2193d7184a96f667ad4f018dceabcdac49eb4216464412ed12b78f9","source":{"kind":"arxiv","id":"2606.03311","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.03311","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"arxiv_version","alias_value":"2606.03311v1","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.03311","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_12","alias_value":"NJDXILXCDE6X","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_16","alias_value":"NJDXILXCDE6XDBFJ","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_8","alias_value":"NJDXILXC","created_at":"2026-06-03T01:05:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:NJDXILXCDE6XDBFJN5THVVHQDD","target":"record","payload":{"canonical_record":{"source":{"id":"2606.03311","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2026-06-02T08:24:18Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"a656cfb9bed0b5b35e04938b8ed56cf00a575adb4cad5e0c7be21cefb89570a5","abstract_canon_sha256":"fb46cdb7253d943e70e1799082ba585ca6f255bc36415d864ef7a9dd5202893c"},"schema_version":"1.0"},"canonical_sha256":"6a47742ee2193d7184a96f667ad4f018dceabcdac49eb4216464412ed12b78f9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-03T01:05:54.685371Z","signature_b64":"QSCChYAiUYbrlQnfSrFwYRajH9KKhysHJNzErSNZGJEQYW9BlRLbl6ljT9NGTw7JzTpEKfJjWynQe+w4NcaODg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a47742ee2193d7184a96f667ad4f018dceabcdac49eb4216464412ed12b78f9","last_reissued_at":"2026-06-03T01:05:54.684984Z","signature_status":"signed_v1","first_computed_at":"2026-06-03T01:05:54.684984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.03311","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-03T01:05:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KKnlwFivrlcCbuwGmw+uoYDBvz7nqMA3RNyYXojvf5byXx5YSFijrwcjJUA4woOSwWMLoC5Wltggx0iyNKMQCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T17:48:46.993540Z"},"content_sha256":"c527af9f8d97066b4627c2f64e29c0d934168a02ac84b00324a337017f6ecd6c","schema_version":"1.0","event_id":"sha256:c527af9f8d97066b4627c2f64e29c0d934168a02ac84b00324a337017f6ecd6c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:NJDXILXCDE6XDBFJN5THVVHQDD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Novel Detection Method for Single-RF MIMO-OFDM Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Jun Qian, Ross Murch, Tianrui Qiao","submitted_at":"2026-06-02T08:24:18Z","abstract_excerpt":"A novel detection method based on maximum-likelihood (ML) detection leveraging Mahalanobis distance is proposed for single-radio-frequency (RF) multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. It can enhance bit error rate (BER) performance and is based on the observation that when using reconfigurable antennas (such as electronically steerable parasitic array radiators (ESPARs) to create a single-RF MIMO system, an additional model error arising from the reconfigurable antennas is introduced. These modeling errors produce an irreducible BER (err"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.03311","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.03311/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-03T01:05:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f5cVf5IkVZUBxKkcDVGry7irpo82gUck8TcBtz2WuSSjBql+cOIB0sYRUFLEULWeI53M5K1oWkEtGO3kxa4VDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T17:48:46.993902Z"},"content_sha256":"b5e3f9bd2a950a22e5d4f2e7162e1fe9aed31e8082786fa36c83f79ac12eaf95","schema_version":"1.0","event_id":"sha256:b5e3f9bd2a950a22e5d4f2e7162e1fe9aed31e8082786fa36c83f79ac12eaf95"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NJDXILXCDE6XDBFJN5THVVHQDD/bundle.json","state_url":"https://pith.science/pith/NJDXILXCDE6XDBFJN5THVVHQDD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NJDXILXCDE6XDBFJN5THVVHQDD/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-03T17:48:46Z","links":{"resolver":"https://pith.science/pith/NJDXILXCDE6XDBFJN5THVVHQDD","bundle":"https://pith.science/pith/NJDXILXCDE6XDBFJN5THVVHQDD/bundle.json","state":"https://pith.science/pith/NJDXILXCDE6XDBFJN5THVVHQDD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NJDXILXCDE6XDBFJN5THVVHQDD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:NJDXILXCDE6XDBFJN5THVVHQDD","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":"fb46cdb7253d943e70e1799082ba585ca6f255bc36415d864ef7a9dd5202893c","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2026-06-02T08:24:18Z","title_canon_sha256":"a656cfb9bed0b5b35e04938b8ed56cf00a575adb4cad5e0c7be21cefb89570a5"},"schema_version":"1.0","source":{"id":"2606.03311","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.03311","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"arxiv_version","alias_value":"2606.03311v1","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.03311","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_12","alias_value":"NJDXILXCDE6X","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_16","alias_value":"NJDXILXCDE6XDBFJ","created_at":"2026-06-03T01:05:54Z"},{"alias_kind":"pith_short_8","alias_value":"NJDXILXC","created_at":"2026-06-03T01:05:54Z"}],"graph_snapshots":[{"event_id":"sha256:b5e3f9bd2a950a22e5d4f2e7162e1fe9aed31e8082786fa36c83f79ac12eaf95","target":"graph","created_at":"2026-06-03T01:05:54Z","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/2606.03311/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A novel detection method based on maximum-likelihood (ML) detection leveraging Mahalanobis distance is proposed for single-radio-frequency (RF) multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. It can enhance bit error rate (BER) performance and is based on the observation that when using reconfigurable antennas (such as electronically steerable parasitic array radiators (ESPARs) to create a single-RF MIMO system, an additional model error arising from the reconfigurable antennas is introduced. These modeling errors produce an irreducible BER (err","authors_text":"Jun Qian, Ross Murch, Tianrui Qiao","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2026-06-02T08:24:18Z","title":"A Novel Detection Method for Single-RF MIMO-OFDM Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.03311","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:c527af9f8d97066b4627c2f64e29c0d934168a02ac84b00324a337017f6ecd6c","target":"record","created_at":"2026-06-03T01:05:54Z","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":"fb46cdb7253d943e70e1799082ba585ca6f255bc36415d864ef7a9dd5202893c","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2026-06-02T08:24:18Z","title_canon_sha256":"a656cfb9bed0b5b35e04938b8ed56cf00a575adb4cad5e0c7be21cefb89570a5"},"schema_version":"1.0","source":{"id":"2606.03311","kind":"arxiv","version":1}},"canonical_sha256":"6a47742ee2193d7184a96f667ad4f018dceabcdac49eb4216464412ed12b78f9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6a47742ee2193d7184a96f667ad4f018dceabcdac49eb4216464412ed12b78f9","first_computed_at":"2026-06-03T01:05:54.684984Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-03T01:05:54.684984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QSCChYAiUYbrlQnfSrFwYRajH9KKhysHJNzErSNZGJEQYW9BlRLbl6ljT9NGTw7JzTpEKfJjWynQe+w4NcaODg==","signature_status":"signed_v1","signed_at":"2026-06-03T01:05:54.685371Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.03311","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c527af9f8d97066b4627c2f64e29c0d934168a02ac84b00324a337017f6ecd6c","sha256:b5e3f9bd2a950a22e5d4f2e7162e1fe9aed31e8082786fa36c83f79ac12eaf95"],"state_sha256":"e44ee44cf91db57c05f125aa44810f68325c606b55efcb328eb1f28cc9216318"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1hc3ApB4oqfY6FakR/qNGYPRqIKgCb8FhvceFH11LO60zeC9GJlXu3x0Lt1c4fTgfbY6UTkOl0KFj774lv/KAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-03T17:48:46.995853Z","bundle_sha256":"b55dbacb4c82c1088440e980d549d6fb7cbe72edc99a2def7e92e8849d35fb4d"}}