{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HACKBPQXJLKKBZXETLDQEZM2J4","short_pith_number":"pith:HACKBPQX","canonical_record":{"source":{"id":"1801.07246","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-01-19T21:10:01Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"8dcd31f9a4351b5d82c567d5c49503f9c191eb15d281dc75871523213dc98742","abstract_canon_sha256":"a2840016c5ffb956184ca4c2a33d017097028f90df64f68346f5fd56b6cc83fe"},"schema_version":"1.0"},"canonical_sha256":"3804a0be174ad4a0e6e49ac702659a4f253fad09c3a6d5f4eab2b470504c2455","source":{"kind":"arxiv","id":"1801.07246","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.07246","created_at":"2026-05-18T00:23:52Z"},{"alias_kind":"arxiv_version","alias_value":"1801.07246v2","created_at":"2026-05-18T00:23:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.07246","created_at":"2026-05-18T00:23:52Z"},{"alias_kind":"pith_short_12","alias_value":"HACKBPQXJLKK","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HACKBPQXJLKKBZXE","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HACKBPQX","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HACKBPQXJLKKBZXETLDQEZM2J4","target":"record","payload":{"canonical_record":{"source":{"id":"1801.07246","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-01-19T21:10:01Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"8dcd31f9a4351b5d82c567d5c49503f9c191eb15d281dc75871523213dc98742","abstract_canon_sha256":"a2840016c5ffb956184ca4c2a33d017097028f90df64f68346f5fd56b6cc83fe"},"schema_version":"1.0"},"canonical_sha256":"3804a0be174ad4a0e6e49ac702659a4f253fad09c3a6d5f4eab2b470504c2455","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:23:52.071328Z","signature_b64":"Tko9nXsyhezH1Z+VJXs33ARlbqx+IFgkiuMdRXNyNa47MsHXD+rgu1pN666KY6Nq5U97DQgv2yOtKNZmI3dmDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3804a0be174ad4a0e6e49ac702659a4f253fad09c3a6d5f4eab2b470504c2455","last_reissued_at":"2026-05-18T00:23:52.070666Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:23:52.070666Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.07246","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":"2026-05-18T00:23:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dKY/FyIjdGcf6BuuMFETaWv0OqevZXyF+Ci8I9TEu7O9F96Kt9FVwOS+muCp7tB4/xqnR7DeFLfpNH6nU9z1Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T04:13:53.887220Z"},"content_sha256":"11c9f4720c439cbb3b33d9178b1a5cba8405239a1dce4eebb138486d0fe870a7","schema_version":"1.0","event_id":"sha256:11c9f4720c439cbb3b33d9178b1a5cba8405239a1dce4eebb138486d0fe870a7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HACKBPQXJLKKBZXETLDQEZM2J4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Distributed Frequency Offsets Estimation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Jian Du, Shaodan Ma","submitted_at":"2018-01-19T21:10:01Z","abstract_excerpt":"In this paper, we provide a distributed frequency offset estimation algorithm based on a variant of belief propagation (BP). Each agent in the network pre-compensates its carrier frequency individually so that there is no frequency offset from the desired carrier frequency between each pair of transceiver. The pre-compensated offset for each agent is computed in a distributed fashion in order to be adaptive to the distributed network. The updating procedure of the variant of BP is designed in a broadcasting fashion to reduce communication burden. It is rigorously proved that the proposed algor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07246","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":""},"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":"2026-05-18T00:23:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zhWoL+sR5w6LwmRTg6oud5L/u7OEfQJ523xT1sNXG6CB18Jj01hjKezI2kUuSKMh/2AHh0fgP8UPXfQo+kJTAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T04:13:53.887853Z"},"content_sha256":"2c100a4cbc33ab525756f041d04694457f6057cf42be32c12c5eeae6f7359fcf","schema_version":"1.0","event_id":"sha256:2c100a4cbc33ab525756f041d04694457f6057cf42be32c12c5eeae6f7359fcf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HACKBPQXJLKKBZXETLDQEZM2J4/bundle.json","state_url":"https://pith.science/pith/HACKBPQXJLKKBZXETLDQEZM2J4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HACKBPQXJLKKBZXETLDQEZM2J4/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":"2026-05-25T04:13:53Z","links":{"resolver":"https://pith.science/pith/HACKBPQXJLKKBZXETLDQEZM2J4","bundle":"https://pith.science/pith/HACKBPQXJLKKBZXETLDQEZM2J4/bundle.json","state":"https://pith.science/pith/HACKBPQXJLKKBZXETLDQEZM2J4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HACKBPQXJLKKBZXETLDQEZM2J4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HACKBPQXJLKKBZXETLDQEZM2J4","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":"a2840016c5ffb956184ca4c2a33d017097028f90df64f68346f5fd56b6cc83fe","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-01-19T21:10:01Z","title_canon_sha256":"8dcd31f9a4351b5d82c567d5c49503f9c191eb15d281dc75871523213dc98742"},"schema_version":"1.0","source":{"id":"1801.07246","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.07246","created_at":"2026-05-18T00:23:52Z"},{"alias_kind":"arxiv_version","alias_value":"1801.07246v2","created_at":"2026-05-18T00:23:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.07246","created_at":"2026-05-18T00:23:52Z"},{"alias_kind":"pith_short_12","alias_value":"HACKBPQXJLKK","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HACKBPQXJLKKBZXE","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HACKBPQX","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:2c100a4cbc33ab525756f041d04694457f6057cf42be32c12c5eeae6f7359fcf","target":"graph","created_at":"2026-05-18T00:23:52Z","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":"In this paper, we provide a distributed frequency offset estimation algorithm based on a variant of belief propagation (BP). Each agent in the network pre-compensates its carrier frequency individually so that there is no frequency offset from the desired carrier frequency between each pair of transceiver. The pre-compensated offset for each agent is computed in a distributed fashion in order to be adaptive to the distributed network. The updating procedure of the variant of BP is designed in a broadcasting fashion to reduce communication burden. It is rigorously proved that the proposed algor","authors_text":"Jian Du, Shaodan Ma","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-01-19T21:10:01Z","title":"Distributed Frequency Offsets Estimation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07246","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":"sha256:11c9f4720c439cbb3b33d9178b1a5cba8405239a1dce4eebb138486d0fe870a7","target":"record","created_at":"2026-05-18T00:23:52Z","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":"a2840016c5ffb956184ca4c2a33d017097028f90df64f68346f5fd56b6cc83fe","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-01-19T21:10:01Z","title_canon_sha256":"8dcd31f9a4351b5d82c567d5c49503f9c191eb15d281dc75871523213dc98742"},"schema_version":"1.0","source":{"id":"1801.07246","kind":"arxiv","version":2}},"canonical_sha256":"3804a0be174ad4a0e6e49ac702659a4f253fad09c3a6d5f4eab2b470504c2455","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3804a0be174ad4a0e6e49ac702659a4f253fad09c3a6d5f4eab2b470504c2455","first_computed_at":"2026-05-18T00:23:52.070666Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:23:52.070666Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Tko9nXsyhezH1Z+VJXs33ARlbqx+IFgkiuMdRXNyNa47MsHXD+rgu1pN666KY6Nq5U97DQgv2yOtKNZmI3dmDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:23:52.071328Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.07246","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:11c9f4720c439cbb3b33d9178b1a5cba8405239a1dce4eebb138486d0fe870a7","sha256:2c100a4cbc33ab525756f041d04694457f6057cf42be32c12c5eeae6f7359fcf"],"state_sha256":"067dcd2d412144ebb6e4356570eae9d815e514a400f56bc24cae91d0b627fa8d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m5TKUm/f+DFEmabKb46qWi9l9Gd/PsnPgtEbrr4X8MoIsix+YVeON3GcTod6ndKqIkWj+vcEzRrcfH+MveCRDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T04:13:53.891132Z","bundle_sha256":"d437fe457c1cc3913b29fc79492497d59da5e57ecac54a20ee542b4eb1f70460"}}