{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4ODM52BRFZGHDQI24CGX7A45MX","short_pith_number":"pith:4ODM52BR","canonical_record":{"source":{"id":"1802.03867","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-02-12T02:55:21Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"f4a5d5c232ed1bc69dd08c42a11809f8bc07eb2599dcb5e7c4ff34c7b7bbeaab","abstract_canon_sha256":"46ffccc0166cec6f023aa467f905b2de6cdd0a0854e6530e30fccdefe08df361"},"schema_version":"1.0"},"canonical_sha256":"e386cee8312e4c71c11ae08d7f839d65d23bcf729179f32c783b5e1bd099e8c1","source":{"kind":"arxiv","id":"1802.03867","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.03867","created_at":"2026-05-18T00:23:50Z"},{"alias_kind":"arxiv_version","alias_value":"1802.03867v1","created_at":"2026-05-18T00:23:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.03867","created_at":"2026-05-18T00:23:50Z"},{"alias_kind":"pith_short_12","alias_value":"4ODM52BRFZGH","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4ODM52BRFZGHDQI2","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4ODM52BR","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4ODM52BRFZGHDQI24CGX7A45MX","target":"record","payload":{"canonical_record":{"source":{"id":"1802.03867","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-02-12T02:55:21Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"f4a5d5c232ed1bc69dd08c42a11809f8bc07eb2599dcb5e7c4ff34c7b7bbeaab","abstract_canon_sha256":"46ffccc0166cec6f023aa467f905b2de6cdd0a0854e6530e30fccdefe08df361"},"schema_version":"1.0"},"canonical_sha256":"e386cee8312e4c71c11ae08d7f839d65d23bcf729179f32c783b5e1bd099e8c1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:23:50.182962Z","signature_b64":"0v68Jw+SG9XnAcC2VWbF8j7ax7vnazMltbRPEKp42BepEQ+4plg/X2T6SxtXiDdGYPUbscXznNSxkkglIkh1AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e386cee8312e4c71c11ae08d7f839d65d23bcf729179f32c783b5e1bd099e8c1","last_reissued_at":"2026-05-18T00:23:50.182453Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:23:50.182453Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.03867","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":"2026-05-18T00:23:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j6xXQ0ZAjpMqFgozDqOfNtTRemte0jb1z3vd5M9Rwj83SOVzPVqKxXvYXqPg0NxFdl+SSu41426Lud3zWr3iCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:40:35.809928Z"},"content_sha256":"c8af62ecb8ecd6b20b9e7d0d33fbcfb832a287f90114e60bb8a77b2038911103","schema_version":"1.0","event_id":"sha256:c8af62ecb8ecd6b20b9e7d0d33fbcfb832a287f90114e60bb8a77b2038911103"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4ODM52BRFZGHDQI24CGX7A45MX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-Resolution Angle Tracking for Mobile Wideband Millimeter-Wave Systems with Antenna Array Calibration","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IT","math.IT"],"primary_cat":"eess.SP","authors_text":"Dalin Zhu, Junil Choi, Qian Cheng, Robert W. Heath Jr, Weimin Xiao","submitted_at":"2018-02-12T02:55:21Z","abstract_excerpt":"Millimeter-wave (mmWave) systems use directional beams to support high-rate data communications. Small misalignment between the transmit and receive beams (e.g., due to the mobility) can result in significant drop of the received signal quality especially in line-of-sight communication channels. In this paper, we propose and evaluate high-resolution angle tracking strategies for wideband mmWave systems with mobility. We custom design pairs of auxiliary beams as the tracking beams, and use them to capture the angle variations, towards which the steering directions of the data beams are adjusted"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.03867","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":"2026-05-18T00:23:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"inLYckKvBXETNvfr/ScP4yOIkLy9buB3OleiOvDNa49/tRDrCnkFGkorUHk6/5yu81dVPeaHPXHl4Rw5MoCcBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:40:35.810560Z"},"content_sha256":"897b1141858954a411e59419471ed38d21c55686bcbb9dd3a57e58187ce4cf66","schema_version":"1.0","event_id":"sha256:897b1141858954a411e59419471ed38d21c55686bcbb9dd3a57e58187ce4cf66"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4ODM52BRFZGHDQI24CGX7A45MX/bundle.json","state_url":"https://pith.science/pith/4ODM52BRFZGHDQI24CGX7A45MX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4ODM52BRFZGHDQI24CGX7A45MX/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":"2026-05-28T23:40:35Z","links":{"resolver":"https://pith.science/pith/4ODM52BRFZGHDQI24CGX7A45MX","bundle":"https://pith.science/pith/4ODM52BRFZGHDQI24CGX7A45MX/bundle.json","state":"https://pith.science/pith/4ODM52BRFZGHDQI24CGX7A45MX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4ODM52BRFZGHDQI24CGX7A45MX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4ODM52BRFZGHDQI24CGX7A45MX","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":"46ffccc0166cec6f023aa467f905b2de6cdd0a0854e6530e30fccdefe08df361","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-02-12T02:55:21Z","title_canon_sha256":"f4a5d5c232ed1bc69dd08c42a11809f8bc07eb2599dcb5e7c4ff34c7b7bbeaab"},"schema_version":"1.0","source":{"id":"1802.03867","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.03867","created_at":"2026-05-18T00:23:50Z"},{"alias_kind":"arxiv_version","alias_value":"1802.03867v1","created_at":"2026-05-18T00:23:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.03867","created_at":"2026-05-18T00:23:50Z"},{"alias_kind":"pith_short_12","alias_value":"4ODM52BRFZGH","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4ODM52BRFZGHDQI2","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4ODM52BR","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:897b1141858954a411e59419471ed38d21c55686bcbb9dd3a57e58187ce4cf66","target":"graph","created_at":"2026-05-18T00:23:50Z","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":"Millimeter-wave (mmWave) systems use directional beams to support high-rate data communications. Small misalignment between the transmit and receive beams (e.g., due to the mobility) can result in significant drop of the received signal quality especially in line-of-sight communication channels. In this paper, we propose and evaluate high-resolution angle tracking strategies for wideband mmWave systems with mobility. We custom design pairs of auxiliary beams as the tracking beams, and use them to capture the angle variations, towards which the steering directions of the data beams are adjusted","authors_text":"Dalin Zhu, Junil Choi, Qian Cheng, Robert W. Heath Jr, Weimin Xiao","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-02-12T02:55:21Z","title":"High-Resolution Angle Tracking for Mobile Wideband Millimeter-Wave Systems with Antenna Array Calibration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.03867","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:c8af62ecb8ecd6b20b9e7d0d33fbcfb832a287f90114e60bb8a77b2038911103","target":"record","created_at":"2026-05-18T00:23:50Z","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":"46ffccc0166cec6f023aa467f905b2de6cdd0a0854e6530e30fccdefe08df361","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-02-12T02:55:21Z","title_canon_sha256":"f4a5d5c232ed1bc69dd08c42a11809f8bc07eb2599dcb5e7c4ff34c7b7bbeaab"},"schema_version":"1.0","source":{"id":"1802.03867","kind":"arxiv","version":1}},"canonical_sha256":"e386cee8312e4c71c11ae08d7f839d65d23bcf729179f32c783b5e1bd099e8c1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e386cee8312e4c71c11ae08d7f839d65d23bcf729179f32c783b5e1bd099e8c1","first_computed_at":"2026-05-18T00:23:50.182453Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:23:50.182453Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0v68Jw+SG9XnAcC2VWbF8j7ax7vnazMltbRPEKp42BepEQ+4plg/X2T6SxtXiDdGYPUbscXznNSxkkglIkh1AA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:23:50.182962Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.03867","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c8af62ecb8ecd6b20b9e7d0d33fbcfb832a287f90114e60bb8a77b2038911103","sha256:897b1141858954a411e59419471ed38d21c55686bcbb9dd3a57e58187ce4cf66"],"state_sha256":"162585e8fb4de45da8e5e8f2dc189cdc9e37d321ae27c8b571c58f28d8c2d724"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tsVHvWhXP5Zdq+9owbq3HGmcpzNgcusPS8l7nYgPobKHkp1Z4iMFLPmoLvCKqKQ6s5M4/3l7/szMLMExzgaNDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T23:40:35.813482Z","bundle_sha256":"17b9d010c4b56f6cb24e115fe4d3dac7f2072e048bcecbe1ea5563821e1106aa"}}