{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:RKR53KZ6XHZEMK5YUEVU7JUSHC","short_pith_number":"pith:RKR53KZ6","canonical_record":{"source":{"id":"1704.04725","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-16T05:11:24Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"614fc928520761d2d1f78681daf3a9ac615af081430e877bc3825ece5afe243e","abstract_canon_sha256":"989149ad3826ccd9dd0147ec1c3942e99dd24e551d5782d7aaf4e9d2f24e4494"},"schema_version":"1.0"},"canonical_sha256":"8aa3ddab3eb9f2462bb8a12b4fa69238911e03f566a40d370eb8f1e42ca60ebb","source":{"kind":"arxiv","id":"1704.04725","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.04725","created_at":"2026-05-18T00:46:00Z"},{"alias_kind":"arxiv_version","alias_value":"1704.04725v1","created_at":"2026-05-18T00:46:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.04725","created_at":"2026-05-18T00:46:00Z"},{"alias_kind":"pith_short_12","alias_value":"RKR53KZ6XHZE","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"RKR53KZ6XHZEMK5Y","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"RKR53KZ6","created_at":"2026-05-18T12:31:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:RKR53KZ6XHZEMK5YUEVU7JUSHC","target":"record","payload":{"canonical_record":{"source":{"id":"1704.04725","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-16T05:11:24Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"614fc928520761d2d1f78681daf3a9ac615af081430e877bc3825ece5afe243e","abstract_canon_sha256":"989149ad3826ccd9dd0147ec1c3942e99dd24e551d5782d7aaf4e9d2f24e4494"},"schema_version":"1.0"},"canonical_sha256":"8aa3ddab3eb9f2462bb8a12b4fa69238911e03f566a40d370eb8f1e42ca60ebb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:46:00.144501Z","signature_b64":"fDT3EePLPfu1D+7F3ex2nm8Rurpv3oCAhl9nDD0kOIlre6RIjtwPoGm8ejOHTnvVFZBI0s+EKT223vSCo3OGAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8aa3ddab3eb9f2462bb8a12b4fa69238911e03f566a40d370eb8f1e42ca60ebb","last_reissued_at":"2026-05-18T00:46:00.143723Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:46:00.143723Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.04725","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":"2026-05-18T00:46:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GvLxjlhX74YVTNdM8t8aIOnYXcOUd56EqjfBsBGWYKO1b6oabciP/AFFOWmH5wlPKiqVnHVe8TVySiq8AJRfBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T11:03:33.796159Z"},"content_sha256":"f3c7d035888b9ccc6bf6a1799f4a9c9d9d676bd5123bea307ebc05c1b14731f7","schema_version":"1.0","event_id":"sha256:f3c7d035888b9ccc6bf6a1799f4a9c9d9d676bd5123bea307ebc05c1b14731f7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:RKR53KZ6XHZEMK5YUEVU7JUSHC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Angle-Domain Doppler Pre-Compensation for High-Mobility OFDM Uplink with a Massive ULA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Bobin Yao, Feifei Gao, Pengcheng Mu, Wei Guo, Weile Zhang","submitted_at":"2017-04-16T05:11:24Z","abstract_excerpt":"In this paper, we propose a Doppler pre-compensation scheme for high-mobility orthogonal frequency division multiplexing (OFDM) uplink, where a high-speed terminal transmits signals to the base station (BS). Considering that the time-varying multipath channel consists of multiple Doppler frequency offsets (DFOs) with different angle of departures (AoDs), we propose to perform DFO pre-compensation at the transmitter with a large-scale uniform linear array (ULA). The transmitted signal passes through a beamforming network with high-spatial resolution to produce multiple parallel branches. Each b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.04725","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":"2026-05-18T00:46:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7y6llWE11zy4PyZn7cVL2Zbdrs3hBrXESn6Rb9oOAzc0Bc1QB/lhDiDc5ArdKCEYNbWkNGLgaYch3OsY5JTNCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T11:03:33.796535Z"},"content_sha256":"f6a80cbd357fb22fad60f557f9e3e85ee5e6320f42d4b17128590d9980fceb0f","schema_version":"1.0","event_id":"sha256:f6a80cbd357fb22fad60f557f9e3e85ee5e6320f42d4b17128590d9980fceb0f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RKR53KZ6XHZEMK5YUEVU7JUSHC/bundle.json","state_url":"https://pith.science/pith/RKR53KZ6XHZEMK5YUEVU7JUSHC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RKR53KZ6XHZEMK5YUEVU7JUSHC/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":"2026-06-01T11:03:33Z","links":{"resolver":"https://pith.science/pith/RKR53KZ6XHZEMK5YUEVU7JUSHC","bundle":"https://pith.science/pith/RKR53KZ6XHZEMK5YUEVU7JUSHC/bundle.json","state":"https://pith.science/pith/RKR53KZ6XHZEMK5YUEVU7JUSHC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RKR53KZ6XHZEMK5YUEVU7JUSHC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:RKR53KZ6XHZEMK5YUEVU7JUSHC","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":"989149ad3826ccd9dd0147ec1c3942e99dd24e551d5782d7aaf4e9d2f24e4494","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-16T05:11:24Z","title_canon_sha256":"614fc928520761d2d1f78681daf3a9ac615af081430e877bc3825ece5afe243e"},"schema_version":"1.0","source":{"id":"1704.04725","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.04725","created_at":"2026-05-18T00:46:00Z"},{"alias_kind":"arxiv_version","alias_value":"1704.04725v1","created_at":"2026-05-18T00:46:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.04725","created_at":"2026-05-18T00:46:00Z"},{"alias_kind":"pith_short_12","alias_value":"RKR53KZ6XHZE","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"RKR53KZ6XHZEMK5Y","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"RKR53KZ6","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:f6a80cbd357fb22fad60f557f9e3e85ee5e6320f42d4b17128590d9980fceb0f","target":"graph","created_at":"2026-05-18T00:46:00Z","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 propose a Doppler pre-compensation scheme for high-mobility orthogonal frequency division multiplexing (OFDM) uplink, where a high-speed terminal transmits signals to the base station (BS). Considering that the time-varying multipath channel consists of multiple Doppler frequency offsets (DFOs) with different angle of departures (AoDs), we propose to perform DFO pre-compensation at the transmitter with a large-scale uniform linear array (ULA). The transmitted signal passes through a beamforming network with high-spatial resolution to produce multiple parallel branches. Each b","authors_text":"Bobin Yao, Feifei Gao, Pengcheng Mu, Wei Guo, Weile Zhang","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-16T05:11:24Z","title":"Angle-Domain Doppler Pre-Compensation for High-Mobility OFDM Uplink with a Massive ULA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.04725","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:f3c7d035888b9ccc6bf6a1799f4a9c9d9d676bd5123bea307ebc05c1b14731f7","target":"record","created_at":"2026-05-18T00:46:00Z","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":"989149ad3826ccd9dd0147ec1c3942e99dd24e551d5782d7aaf4e9d2f24e4494","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-04-16T05:11:24Z","title_canon_sha256":"614fc928520761d2d1f78681daf3a9ac615af081430e877bc3825ece5afe243e"},"schema_version":"1.0","source":{"id":"1704.04725","kind":"arxiv","version":1}},"canonical_sha256":"8aa3ddab3eb9f2462bb8a12b4fa69238911e03f566a40d370eb8f1e42ca60ebb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8aa3ddab3eb9f2462bb8a12b4fa69238911e03f566a40d370eb8f1e42ca60ebb","first_computed_at":"2026-05-18T00:46:00.143723Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:46:00.143723Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fDT3EePLPfu1D+7F3ex2nm8Rurpv3oCAhl9nDD0kOIlre6RIjtwPoGm8ejOHTnvVFZBI0s+EKT223vSCo3OGAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:46:00.144501Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.04725","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f3c7d035888b9ccc6bf6a1799f4a9c9d9d676bd5123bea307ebc05c1b14731f7","sha256:f6a80cbd357fb22fad60f557f9e3e85ee5e6320f42d4b17128590d9980fceb0f"],"state_sha256":"61d0d7c8d3b2d28cd1f48700a19fce595a6947809de3c61a5751d891419e41ee"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gGQ5N1VuZqoVOrjpxhAzq/A+iLiXl+HCfoPufgkOGD6csr2RqIDCzLSWgj0q+AO/UokFZJ7meH09qnqMQrI6BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T11:03:33.798599Z","bundle_sha256":"ddedb4a08fa6f9effdd763269b7000a3e4ee5406ce42782bd7aaf25c5ef69b2b"}}