{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:MU4PFIZ6I3UATA2WFZB5CVQVTZ","short_pith_number":"pith:MU4PFIZ6","canonical_record":{"source":{"id":"1107.0662","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2011-07-04T15:37:19Z","cross_cats_sorted":["stat.ML"],"title_canon_sha256":"f603d5b77c7eb7486b4571f2a4013678ce2e2b8bf08a4562d4cc5d5857c9da8f","abstract_canon_sha256":"5499387d882d76b6a28d38d3da85705a5549be74e4a80509974fb0b0ebe3a660"},"schema_version":"1.0"},"canonical_sha256":"6538f2a33e46e80983562e43d156159e7227e1aae6aaafb18b51b46ada61af0a","source":{"kind":"arxiv","id":"1107.0662","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.0662","created_at":"2026-05-18T02:25:12Z"},{"alias_kind":"arxiv_version","alias_value":"1107.0662v1","created_at":"2026-05-18T02:25:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.0662","created_at":"2026-05-18T02:25:12Z"},{"alias_kind":"pith_short_12","alias_value":"MU4PFIZ6I3UA","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"MU4PFIZ6I3UATA2W","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"MU4PFIZ6","created_at":"2026-05-18T12:26:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:MU4PFIZ6I3UATA2WFZB5CVQVTZ","target":"record","payload":{"canonical_record":{"source":{"id":"1107.0662","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2011-07-04T15:37:19Z","cross_cats_sorted":["stat.ML"],"title_canon_sha256":"f603d5b77c7eb7486b4571f2a4013678ce2e2b8bf08a4562d4cc5d5857c9da8f","abstract_canon_sha256":"5499387d882d76b6a28d38d3da85705a5549be74e4a80509974fb0b0ebe3a660"},"schema_version":"1.0"},"canonical_sha256":"6538f2a33e46e80983562e43d156159e7227e1aae6aaafb18b51b46ada61af0a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:25:12.031463Z","signature_b64":"5ctxofSpaH+UEr4ko9FSuxF+uariWRbfz8DF7H5WOS+OJ9eOOpVM+lEHup2e+0AHVBfe44tv9LUFPrQ+fhvYCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6538f2a33e46e80983562e43d156159e7227e1aae6aaafb18b51b46ada61af0a","last_reissued_at":"2026-05-18T02:25:12.031020Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:25:12.031020Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1107.0662","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":"2026-05-18T02:25:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XDeM4kM6ZS0b67OPrOgjkwaKIO9VP7t58giyNH0VxDUNjNBxfzDPkWddyiz1+pNN+9vWrhFmPuYbgcA/zdN4Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T07:29:58.042954Z"},"content_sha256":"65b59b81c67929b5b96543f77a4012005b5dd739d3bf7ac753b4ef77f7678e52","schema_version":"1.0","event_id":"sha256:65b59b81c67929b5b96543f77a4012005b5dd739d3bf7ac753b4ef77f7678e52"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:MU4PFIZ6I3UATA2WFZB5CVQVTZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Variational Bayes Approach to Decoding in a Phase-Uncertain Digital Receiver","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["stat.ML"],"primary_cat":"stat.AP","authors_text":"Anthony Quinn, Arijit Das","submitted_at":"2011-07-04T15:37:19Z","abstract_excerpt":"This paper presents a Bayesian approach to symbol and phase inference in a phase-unsynchronized digital receiver. It primarily extends [Quinn 2011] to the multi-symbol case, using the variational Bayes (VB) approximation to deal with the combinatorial complexity of the phase inference in this case. The work provides a fully Bayesian extension of the EM-based framework underlying current turbo-synchronization methods, since it induces a von Mises prior on the time-invariant phase parmeter. As a result, we achieve tractable iterative algorithms with improved robustness in low SNR regimes, compar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.0662","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":""},"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":"2026-05-18T02:25:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zztkElFumBDWP5MrE5phgpx5mHiTdAOQmm5DfSAwCpgJVADpaiwHaUuXRtGWeZRJlBjQInjeiIABQU6DPVBrCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T07:29:58.043679Z"},"content_sha256":"242cadd5c46a2d9fdd6ca2adb75972d5c042de2c6a80ce2a98733f0d7cb9919d","schema_version":"1.0","event_id":"sha256:242cadd5c46a2d9fdd6ca2adb75972d5c042de2c6a80ce2a98733f0d7cb9919d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MU4PFIZ6I3UATA2WFZB5CVQVTZ/bundle.json","state_url":"https://pith.science/pith/MU4PFIZ6I3UATA2WFZB5CVQVTZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MU4PFIZ6I3UATA2WFZB5CVQVTZ/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":"2026-06-11T07:29:58Z","links":{"resolver":"https://pith.science/pith/MU4PFIZ6I3UATA2WFZB5CVQVTZ","bundle":"https://pith.science/pith/MU4PFIZ6I3UATA2WFZB5CVQVTZ/bundle.json","state":"https://pith.science/pith/MU4PFIZ6I3UATA2WFZB5CVQVTZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MU4PFIZ6I3UATA2WFZB5CVQVTZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:MU4PFIZ6I3UATA2WFZB5CVQVTZ","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":"5499387d882d76b6a28d38d3da85705a5549be74e4a80509974fb0b0ebe3a660","cross_cats_sorted":["stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2011-07-04T15:37:19Z","title_canon_sha256":"f603d5b77c7eb7486b4571f2a4013678ce2e2b8bf08a4562d4cc5d5857c9da8f"},"schema_version":"1.0","source":{"id":"1107.0662","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.0662","created_at":"2026-05-18T02:25:12Z"},{"alias_kind":"arxiv_version","alias_value":"1107.0662v1","created_at":"2026-05-18T02:25:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.0662","created_at":"2026-05-18T02:25:12Z"},{"alias_kind":"pith_short_12","alias_value":"MU4PFIZ6I3UA","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"MU4PFIZ6I3UATA2W","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"MU4PFIZ6","created_at":"2026-05-18T12:26:37Z"}],"graph_snapshots":[{"event_id":"sha256:242cadd5c46a2d9fdd6ca2adb75972d5c042de2c6a80ce2a98733f0d7cb9919d","target":"graph","created_at":"2026-05-18T02:25:12Z","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":"This paper presents a Bayesian approach to symbol and phase inference in a phase-unsynchronized digital receiver. It primarily extends [Quinn 2011] to the multi-symbol case, using the variational Bayes (VB) approximation to deal with the combinatorial complexity of the phase inference in this case. The work provides a fully Bayesian extension of the EM-based framework underlying current turbo-synchronization methods, since it induces a von Mises prior on the time-invariant phase parmeter. As a result, we achieve tractable iterative algorithms with improved robustness in low SNR regimes, compar","authors_text":"Anthony Quinn, Arijit Das","cross_cats":["stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2011-07-04T15:37:19Z","title":"A Variational Bayes Approach to Decoding in a Phase-Uncertain Digital Receiver"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.0662","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":"sha256:65b59b81c67929b5b96543f77a4012005b5dd739d3bf7ac753b4ef77f7678e52","target":"record","created_at":"2026-05-18T02:25:12Z","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":"5499387d882d76b6a28d38d3da85705a5549be74e4a80509974fb0b0ebe3a660","cross_cats_sorted":["stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2011-07-04T15:37:19Z","title_canon_sha256":"f603d5b77c7eb7486b4571f2a4013678ce2e2b8bf08a4562d4cc5d5857c9da8f"},"schema_version":"1.0","source":{"id":"1107.0662","kind":"arxiv","version":1}},"canonical_sha256":"6538f2a33e46e80983562e43d156159e7227e1aae6aaafb18b51b46ada61af0a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6538f2a33e46e80983562e43d156159e7227e1aae6aaafb18b51b46ada61af0a","first_computed_at":"2026-05-18T02:25:12.031020Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:25:12.031020Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5ctxofSpaH+UEr4ko9FSuxF+uariWRbfz8DF7H5WOS+OJ9eOOpVM+lEHup2e+0AHVBfe44tv9LUFPrQ+fhvYCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:25:12.031463Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.0662","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:65b59b81c67929b5b96543f77a4012005b5dd739d3bf7ac753b4ef77f7678e52","sha256:242cadd5c46a2d9fdd6ca2adb75972d5c042de2c6a80ce2a98733f0d7cb9919d"],"state_sha256":"85f44063489018ba48b63fad0c5a23ccdfa0560766524a34498eb802975197a2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YiCy13UEYlHRJq4pEzDUO7RTfTNYPMHSeEhIy3KXKaQkltrIaR5gZy18BtmZ/6+8JpMDvrI4Of3UMSFVaYMJAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T07:29:58.048390Z","bundle_sha256":"03e658c4289f0729ab27e52137081b790e0413517a52aaacfb39c06b74c052c3"}}