{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:GQ5RT76KPHMIRSV5EZSXYKCWJL","short_pith_number":"pith:GQ5RT76K","canonical_record":{"source":{"id":"2309.08782","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2023-09-15T22:02:20Z","cross_cats_sorted":[],"title_canon_sha256":"7d10f0d2a179bcb818cbb76c5f49d95ba1e9a2a6218ec2925c119aa663e58eee","abstract_canon_sha256":"b27aa24b3a615554df50795debdcb940fc1b1bccc3af8d4687cff635b0509cbf"},"schema_version":"1.0"},"canonical_sha256":"343b19ffca79d888cabd26657c28564ad5a2897a519d490dbbbfc6be9df48849","source":{"kind":"arxiv","id":"2309.08782","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2309.08782","created_at":"2026-07-05T09:33:26Z"},{"alias_kind":"arxiv_version","alias_value":"2309.08782v2","created_at":"2026-07-05T09:33:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2309.08782","created_at":"2026-07-05T09:33:26Z"},{"alias_kind":"pith_short_12","alias_value":"GQ5RT76KPHMI","created_at":"2026-07-05T09:33:26Z"},{"alias_kind":"pith_short_16","alias_value":"GQ5RT76KPHMIRSV5","created_at":"2026-07-05T09:33:26Z"},{"alias_kind":"pith_short_8","alias_value":"GQ5RT76K","created_at":"2026-07-05T09:33:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:GQ5RT76KPHMIRSV5EZSXYKCWJL","target":"record","payload":{"canonical_record":{"source":{"id":"2309.08782","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2023-09-15T22:02:20Z","cross_cats_sorted":[],"title_canon_sha256":"7d10f0d2a179bcb818cbb76c5f49d95ba1e9a2a6218ec2925c119aa663e58eee","abstract_canon_sha256":"b27aa24b3a615554df50795debdcb940fc1b1bccc3af8d4687cff635b0509cbf"},"schema_version":"1.0"},"canonical_sha256":"343b19ffca79d888cabd26657c28564ad5a2897a519d490dbbbfc6be9df48849","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:33:26.106781Z","signature_b64":"+EHRwE+3mnVUkMHEvfJVPg5nybjQY81Udam92cB68gTeKmYw0QVk2wODJ8ZTG1ZT9U/SXSPEZrA9jvcSsnLGBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"343b19ffca79d888cabd26657c28564ad5a2897a519d490dbbbfc6be9df48849","last_reissued_at":"2026-07-05T09:33:26.106349Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:33:26.106349Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2309.08782","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T09:33:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EbfE980eixeYQ8xApxI6YiWzp177d5iOUH8rvZJp+wms/IgCNyw9eZqKhy/KPJnoWnRwPDNXdEPmG8hQOj8bBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T14:08:20.083195Z"},"content_sha256":"610757892230a86da4af33e1fa1e910d7e1ece57c55eb92d38e33aa333c3a9d4","schema_version":"1.0","event_id":"sha256:610757892230a86da4af33e1fa1e910d7e1ece57c55eb92d38e33aa333c3a9d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:GQ5RT76KPHMIRSV5EZSXYKCWJL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stein Variational Gradient Descent-based Detection For Random Access With Preambles In MTC","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Ahmet Enis Cetin, Hongyi Pan, Salih Atici, Xin Zhu","submitted_at":"2023-09-15T22:02:20Z","abstract_excerpt":"Traditional preamble detection algorithms have low accuracy in the grant-based random access scheme in massive machine-type communication (mMTC). We present a novel preamble detection algorithm based on Stein variational gradient descent (SVGD) at the second step of the random access procedure. It efficiently leverages deterministic updates of particles for continuous inference. To further enhance the performance of the SVGD detector, especially in a dense user scenario, we propose a normalized SVGD detector with momentum. It utilizes the momentum and a bias correction term to reduce the pream"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.08782","kind":"arxiv","version":2},"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/2309.08782/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":"2026-07-05T09:33:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gRxtwMrdUYuwz+6cHwb6BjP33t1PTvj0XVLDS2aQ1V4ZTvtqlmI2qmmND0tEsa7b3PcUXgBZzuXLtlPnBFv2Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T14:08:20.083937Z"},"content_sha256":"a25edc9e07abd69a8b10b59113abe59bdbabbb9e90d497146fd52de1bcc24859","schema_version":"1.0","event_id":"sha256:a25edc9e07abd69a8b10b59113abe59bdbabbb9e90d497146fd52de1bcc24859"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GQ5RT76KPHMIRSV5EZSXYKCWJL/bundle.json","state_url":"https://pith.science/pith/GQ5RT76KPHMIRSV5EZSXYKCWJL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GQ5RT76KPHMIRSV5EZSXYKCWJL/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":"2026-08-17T14:08:20Z","links":{"resolver":"https://pith.science/pith/GQ5RT76KPHMIRSV5EZSXYKCWJL","bundle":"https://pith.science/pith/GQ5RT76KPHMIRSV5EZSXYKCWJL/bundle.json","state":"https://pith.science/pith/GQ5RT76KPHMIRSV5EZSXYKCWJL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GQ5RT76KPHMIRSV5EZSXYKCWJL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:GQ5RT76KPHMIRSV5EZSXYKCWJL","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":"b27aa24b3a615554df50795debdcb940fc1b1bccc3af8d4687cff635b0509cbf","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2023-09-15T22:02:20Z","title_canon_sha256":"7d10f0d2a179bcb818cbb76c5f49d95ba1e9a2a6218ec2925c119aa663e58eee"},"schema_version":"1.0","source":{"id":"2309.08782","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2309.08782","created_at":"2026-07-05T09:33:26Z"},{"alias_kind":"arxiv_version","alias_value":"2309.08782v2","created_at":"2026-07-05T09:33:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2309.08782","created_at":"2026-07-05T09:33:26Z"},{"alias_kind":"pith_short_12","alias_value":"GQ5RT76KPHMI","created_at":"2026-07-05T09:33:26Z"},{"alias_kind":"pith_short_16","alias_value":"GQ5RT76KPHMIRSV5","created_at":"2026-07-05T09:33:26Z"},{"alias_kind":"pith_short_8","alias_value":"GQ5RT76K","created_at":"2026-07-05T09:33:26Z"}],"graph_snapshots":[{"event_id":"sha256:a25edc9e07abd69a8b10b59113abe59bdbabbb9e90d497146fd52de1bcc24859","target":"graph","created_at":"2026-07-05T09:33:26Z","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/2309.08782/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Traditional preamble detection algorithms have low accuracy in the grant-based random access scheme in massive machine-type communication (mMTC). We present a novel preamble detection algorithm based on Stein variational gradient descent (SVGD) at the second step of the random access procedure. It efficiently leverages deterministic updates of particles for continuous inference. To further enhance the performance of the SVGD detector, especially in a dense user scenario, we propose a normalized SVGD detector with momentum. It utilizes the momentum and a bias correction term to reduce the pream","authors_text":"Ahmet Enis Cetin, Hongyi Pan, Salih Atici, Xin Zhu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2023-09-15T22:02:20Z","title":"Stein Variational Gradient Descent-based Detection For Random Access With Preambles In MTC"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.08782","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":"sha256:610757892230a86da4af33e1fa1e910d7e1ece57c55eb92d38e33aa333c3a9d4","target":"record","created_at":"2026-07-05T09:33:26Z","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":"b27aa24b3a615554df50795debdcb940fc1b1bccc3af8d4687cff635b0509cbf","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2023-09-15T22:02:20Z","title_canon_sha256":"7d10f0d2a179bcb818cbb76c5f49d95ba1e9a2a6218ec2925c119aa663e58eee"},"schema_version":"1.0","source":{"id":"2309.08782","kind":"arxiv","version":2}},"canonical_sha256":"343b19ffca79d888cabd26657c28564ad5a2897a519d490dbbbfc6be9df48849","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"343b19ffca79d888cabd26657c28564ad5a2897a519d490dbbbfc6be9df48849","first_computed_at":"2026-07-05T09:33:26.106349Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:33:26.106349Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+EHRwE+3mnVUkMHEvfJVPg5nybjQY81Udam92cB68gTeKmYw0QVk2wODJ8ZTG1ZT9U/SXSPEZrA9jvcSsnLGBw==","signature_status":"signed_v1","signed_at":"2026-07-05T09:33:26.106781Z","signed_message":"canonical_sha256_bytes"},"source_id":"2309.08782","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:610757892230a86da4af33e1fa1e910d7e1ece57c55eb92d38e33aa333c3a9d4","sha256:a25edc9e07abd69a8b10b59113abe59bdbabbb9e90d497146fd52de1bcc24859"],"state_sha256":"6b1eb1cdf5b2772cc053ccff22aad1d2c3598207d509cf0e6e2cd01e592aa3f0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9VEqTunvi5kcHsW2Rm3A42+iz/TpW2d9hnUL0H6eLBNpS8a4yi3cHNycKG0NQUYvtt0/4KvnV/U1bM2yfTvjDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T14:08:20.089244Z","bundle_sha256":"ff8d2dae73a7ca1a2a007a0d0f85205e1489531321403b0cd26aa11f442eead5"}}