{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:6CXSZRXYQUTXJ7VGC2QVHKJ4L6","short_pith_number":"pith:6CXSZRXY","canonical_record":{"source":{"id":"1708.05443","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-08-17T21:20:07Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"b3d5cc545891f1b96136647e7e4b5e92a1d8b7e63f37cc0f49a8240c0d85f1a8","abstract_canon_sha256":"2fbeef0ee0695dbabc123a31d3a9107b8b849f0220bcbd0587b6068d3b4ef7d9"},"schema_version":"1.0"},"canonical_sha256":"f0af2cc6f8852774fea616a153a93c5fbcdab1dc709ba31dbe1831208b151a18","source":{"kind":"arxiv","id":"1708.05443","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.05443","created_at":"2026-05-18T00:37:50Z"},{"alias_kind":"arxiv_version","alias_value":"1708.05443v1","created_at":"2026-05-18T00:37:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.05443","created_at":"2026-05-18T00:37:50Z"},{"alias_kind":"pith_short_12","alias_value":"6CXSZRXYQUTX","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6CXSZRXYQUTXJ7VG","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6CXSZRXY","created_at":"2026-05-18T12:31:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:6CXSZRXYQUTXJ7VGC2QVHKJ4L6","target":"record","payload":{"canonical_record":{"source":{"id":"1708.05443","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-08-17T21:20:07Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"b3d5cc545891f1b96136647e7e4b5e92a1d8b7e63f37cc0f49a8240c0d85f1a8","abstract_canon_sha256":"2fbeef0ee0695dbabc123a31d3a9107b8b849f0220bcbd0587b6068d3b4ef7d9"},"schema_version":"1.0"},"canonical_sha256":"f0af2cc6f8852774fea616a153a93c5fbcdab1dc709ba31dbe1831208b151a18","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:37:50.068950Z","signature_b64":"HUi6Sb1l8LEbawuPNzq4XPtzcp8Tbxk+9FAAxjnzUaYIiiEuSk+C3ybjakNIknqEAevrFkN7fZSLV5ReTTPKDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f0af2cc6f8852774fea616a153a93c5fbcdab1dc709ba31dbe1831208b151a18","last_reissued_at":"2026-05-18T00:37:50.068373Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:37:50.068373Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.05443","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":"2026-05-18T00:37:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pelgTLZB9d3TORKCVdV1lx6jDNwgYXakPRclvN4Hik2ZFYMLYU0i3xOPLLMZsiXI190p6cZohe9UM+FGnfFsDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T11:09:24.051461Z"},"content_sha256":"fead2cdaab5f56aee67c4221c9a10b99c14786c29892f5d89fdf79f518994fc3","schema_version":"1.0","event_id":"sha256:fead2cdaab5f56aee67c4221c9a10b99c14786c29892f5d89fdf79f518994fc3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:6CXSZRXYQUTXJ7VGC2QVHKJ4L6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Phase Noise Compensation for OFDM Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Amir Leshem, Michal Yemini","submitted_at":"2017-08-17T21:20:07Z","abstract_excerpt":"We describe a low complexity method for time domain compensation of phase noise in OFDM systems. We extend existing methods in several respects. First we suggest using the Karhunen-Lo\\'{e}ve representation of the phase noise process to estimate the phase noise. We then derive an improved datadirected choice of basis elements for LS phase noise estimation and present its total least square counterpart problem. The proposed method helps overcome one of the major weaknesses of OFDM systems. We also generalize the time domain phase noise compensation to the multiuser MIMO context. Finally we prese"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.05443","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":"2026-05-18T00:37:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N61TpLUB5S+1kux6IBMyiz5QvJa5Q1cO1YNyEMO/NPg5Ya/G+BSzTjLW3z6C6E9sgW0bYgtK5hpt/kuaauy2Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T11:09:24.051825Z"},"content_sha256":"68bd0f0c142c566d799d33fba66a378b9180e981c0e352ca5fcda3696a9a345c","schema_version":"1.0","event_id":"sha256:68bd0f0c142c566d799d33fba66a378b9180e981c0e352ca5fcda3696a9a345c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6CXSZRXYQUTXJ7VGC2QVHKJ4L6/bundle.json","state_url":"https://pith.science/pith/6CXSZRXYQUTXJ7VGC2QVHKJ4L6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6CXSZRXYQUTXJ7VGC2QVHKJ4L6/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":"2026-05-30T11:09:24Z","links":{"resolver":"https://pith.science/pith/6CXSZRXYQUTXJ7VGC2QVHKJ4L6","bundle":"https://pith.science/pith/6CXSZRXYQUTXJ7VGC2QVHKJ4L6/bundle.json","state":"https://pith.science/pith/6CXSZRXYQUTXJ7VGC2QVHKJ4L6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6CXSZRXYQUTXJ7VGC2QVHKJ4L6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:6CXSZRXYQUTXJ7VGC2QVHKJ4L6","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":"2fbeef0ee0695dbabc123a31d3a9107b8b849f0220bcbd0587b6068d3b4ef7d9","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-08-17T21:20:07Z","title_canon_sha256":"b3d5cc545891f1b96136647e7e4b5e92a1d8b7e63f37cc0f49a8240c0d85f1a8"},"schema_version":"1.0","source":{"id":"1708.05443","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.05443","created_at":"2026-05-18T00:37:50Z"},{"alias_kind":"arxiv_version","alias_value":"1708.05443v1","created_at":"2026-05-18T00:37:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.05443","created_at":"2026-05-18T00:37:50Z"},{"alias_kind":"pith_short_12","alias_value":"6CXSZRXYQUTX","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6CXSZRXYQUTXJ7VG","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6CXSZRXY","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:68bd0f0c142c566d799d33fba66a378b9180e981c0e352ca5fcda3696a9a345c","target":"graph","created_at":"2026-05-18T00:37:50Z","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":"We describe a low complexity method for time domain compensation of phase noise in OFDM systems. We extend existing methods in several respects. First we suggest using the Karhunen-Lo\\'{e}ve representation of the phase noise process to estimate the phase noise. We then derive an improved datadirected choice of basis elements for LS phase noise estimation and present its total least square counterpart problem. The proposed method helps overcome one of the major weaknesses of OFDM systems. We also generalize the time domain phase noise compensation to the multiuser MIMO context. Finally we prese","authors_text":"Amir Leshem, Michal Yemini","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-08-17T21:20:07Z","title":"Phase Noise Compensation for OFDM Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.05443","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:fead2cdaab5f56aee67c4221c9a10b99c14786c29892f5d89fdf79f518994fc3","target":"record","created_at":"2026-05-18T00:37:50Z","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":"2fbeef0ee0695dbabc123a31d3a9107b8b849f0220bcbd0587b6068d3b4ef7d9","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-08-17T21:20:07Z","title_canon_sha256":"b3d5cc545891f1b96136647e7e4b5e92a1d8b7e63f37cc0f49a8240c0d85f1a8"},"schema_version":"1.0","source":{"id":"1708.05443","kind":"arxiv","version":1}},"canonical_sha256":"f0af2cc6f8852774fea616a153a93c5fbcdab1dc709ba31dbe1831208b151a18","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f0af2cc6f8852774fea616a153a93c5fbcdab1dc709ba31dbe1831208b151a18","first_computed_at":"2026-05-18T00:37:50.068373Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:37:50.068373Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HUi6Sb1l8LEbawuPNzq4XPtzcp8Tbxk+9FAAxjnzUaYIiiEuSk+C3ybjakNIknqEAevrFkN7fZSLV5ReTTPKDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:37:50.068950Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.05443","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fead2cdaab5f56aee67c4221c9a10b99c14786c29892f5d89fdf79f518994fc3","sha256:68bd0f0c142c566d799d33fba66a378b9180e981c0e352ca5fcda3696a9a345c"],"state_sha256":"3fce410d314e09485da0c18be20c5f4fe0c2c93d78262ee537324001a46bf8c5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jxgycXij48drN1zpu8cbXM6POFdaZJUXsegzfzSF5GHqwAuOJETFhwjMclii+jMEigOY5/sWm4ZrGky++DzADg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T11:09:24.053815Z","bundle_sha256":"d548c8235135a70ea3b77370f55c82a58de7da724204ab3a6bfe15ccb86cda1d"}}