{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:HQ2EUOM3HWJM5PITWJTPY5T52S","short_pith_number":"pith:HQ2EUOM3","canonical_record":{"source":{"id":"1607.01272","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-07-05T14:37:15Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"6636f949e5ea37f741e09c05ba107368aac5917d61a6b98f4dde333daa1f5f8e","abstract_canon_sha256":"64ff1d3b81eda85cd15896e788d6340c6a56a72efd355b93d7aaaee3ec3b8bfc"},"schema_version":"1.0"},"canonical_sha256":"3c344a399b3d92cebd13b266fc767dd4878d79d9c13b50dec21613ebfaf4e299","source":{"kind":"arxiv","id":"1607.01272","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.01272","created_at":"2026-05-18T01:11:09Z"},{"alias_kind":"arxiv_version","alias_value":"1607.01272v1","created_at":"2026-05-18T01:11:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.01272","created_at":"2026-05-18T01:11:09Z"},{"alias_kind":"pith_short_12","alias_value":"HQ2EUOM3HWJM","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"HQ2EUOM3HWJM5PIT","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"HQ2EUOM3","created_at":"2026-05-18T12:30:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:HQ2EUOM3HWJM5PITWJTPY5T52S","target":"record","payload":{"canonical_record":{"source":{"id":"1607.01272","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-07-05T14:37:15Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"6636f949e5ea37f741e09c05ba107368aac5917d61a6b98f4dde333daa1f5f8e","abstract_canon_sha256":"64ff1d3b81eda85cd15896e788d6340c6a56a72efd355b93d7aaaee3ec3b8bfc"},"schema_version":"1.0"},"canonical_sha256":"3c344a399b3d92cebd13b266fc767dd4878d79d9c13b50dec21613ebfaf4e299","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:09.809094Z","signature_b64":"6F1nsSQ1l7uezucXn0XhnJcxvIn1GN8V4xpby9eBPALP2I8taQVfcXUG5IL82mGH0/boTOYWVhq5DDqv4RmZCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3c344a399b3d92cebd13b266fc767dd4878d79d9c13b50dec21613ebfaf4e299","last_reissued_at":"2026-05-18T01:11:09.808704Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:09.808704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.01272","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":"2026-05-18T01:11:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2Pu8zl2fSdEIGizPqU09beqhBAHIY7UwiOGUGnjlGuLMN8leMVO5zuNudY4WkA+umvYIC3hFcCVmtg6RfRapCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T09:06:38.153227Z"},"content_sha256":"2f0fff20199f690763c575e6608ab012fd8ff760e1cde829c25d372561a33c46","schema_version":"1.0","event_id":"sha256:2f0fff20199f690763c575e6608ab012fd8ff760e1cde829c25d372561a33c46"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:HQ2EUOM3HWJM5PITWJTPY5T52S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Parallelized Structures for MIMO FBMC under Strong Channel Frequency Selectivity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"David Gregoratti, Xavier Mestre","submitted_at":"2016-07-05T14:37:15Z","abstract_excerpt":"A novel architecture for MIMO transmission and reception of filterbank multicarrier (FBMC) modulated signals under strong frequency selectivity is presented. The proposed system seeks to approximate an ideal frequency-selective precoder and linear receiver by Taylor expansion, exploiting the structure of the analysis and synthesis filterbanks. The resulting architecture is implemented by linearly combining conventional MIMO linear transceivers, which are applied to sequential derivatives of the original filterbank. The classical per-subcarrier precoding/linear receiver configuration is obtaine"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.01272","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":"2026-05-18T01:11:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bKCSpFHFvVaULqZs54/IAPBajrpRZhKwkvn7x4bRdAKWhWu/a5DzvsMHw64+gNLNWTerN9oJhjIMPd/OYMYxAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T09:06:38.153945Z"},"content_sha256":"ba305e8be39a1d51afee01f9151a721398ed5c46453b055a0871f7a23eb4742a","schema_version":"1.0","event_id":"sha256:ba305e8be39a1d51afee01f9151a721398ed5c46453b055a0871f7a23eb4742a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HQ2EUOM3HWJM5PITWJTPY5T52S/bundle.json","state_url":"https://pith.science/pith/HQ2EUOM3HWJM5PITWJTPY5T52S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HQ2EUOM3HWJM5PITWJTPY5T52S/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":"2026-05-24T09:06:38Z","links":{"resolver":"https://pith.science/pith/HQ2EUOM3HWJM5PITWJTPY5T52S","bundle":"https://pith.science/pith/HQ2EUOM3HWJM5PITWJTPY5T52S/bundle.json","state":"https://pith.science/pith/HQ2EUOM3HWJM5PITWJTPY5T52S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HQ2EUOM3HWJM5PITWJTPY5T52S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:HQ2EUOM3HWJM5PITWJTPY5T52S","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":"64ff1d3b81eda85cd15896e788d6340c6a56a72efd355b93d7aaaee3ec3b8bfc","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-07-05T14:37:15Z","title_canon_sha256":"6636f949e5ea37f741e09c05ba107368aac5917d61a6b98f4dde333daa1f5f8e"},"schema_version":"1.0","source":{"id":"1607.01272","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.01272","created_at":"2026-05-18T01:11:09Z"},{"alias_kind":"arxiv_version","alias_value":"1607.01272v1","created_at":"2026-05-18T01:11:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.01272","created_at":"2026-05-18T01:11:09Z"},{"alias_kind":"pith_short_12","alias_value":"HQ2EUOM3HWJM","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"HQ2EUOM3HWJM5PIT","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"HQ2EUOM3","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:ba305e8be39a1d51afee01f9151a721398ed5c46453b055a0871f7a23eb4742a","target":"graph","created_at":"2026-05-18T01:11:09Z","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":"A novel architecture for MIMO transmission and reception of filterbank multicarrier (FBMC) modulated signals under strong frequency selectivity is presented. The proposed system seeks to approximate an ideal frequency-selective precoder and linear receiver by Taylor expansion, exploiting the structure of the analysis and synthesis filterbanks. The resulting architecture is implemented by linearly combining conventional MIMO linear transceivers, which are applied to sequential derivatives of the original filterbank. The classical per-subcarrier precoding/linear receiver configuration is obtaine","authors_text":"David Gregoratti, Xavier Mestre","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-07-05T14:37:15Z","title":"Parallelized Structures for MIMO FBMC under Strong Channel Frequency Selectivity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.01272","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":"sha256:2f0fff20199f690763c575e6608ab012fd8ff760e1cde829c25d372561a33c46","target":"record","created_at":"2026-05-18T01:11:09Z","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":"64ff1d3b81eda85cd15896e788d6340c6a56a72efd355b93d7aaaee3ec3b8bfc","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-07-05T14:37:15Z","title_canon_sha256":"6636f949e5ea37f741e09c05ba107368aac5917d61a6b98f4dde333daa1f5f8e"},"schema_version":"1.0","source":{"id":"1607.01272","kind":"arxiv","version":1}},"canonical_sha256":"3c344a399b3d92cebd13b266fc767dd4878d79d9c13b50dec21613ebfaf4e299","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c344a399b3d92cebd13b266fc767dd4878d79d9c13b50dec21613ebfaf4e299","first_computed_at":"2026-05-18T01:11:09.808704Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:09.808704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6F1nsSQ1l7uezucXn0XhnJcxvIn1GN8V4xpby9eBPALP2I8taQVfcXUG5IL82mGH0/boTOYWVhq5DDqv4RmZCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:09.809094Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.01272","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2f0fff20199f690763c575e6608ab012fd8ff760e1cde829c25d372561a33c46","sha256:ba305e8be39a1d51afee01f9151a721398ed5c46453b055a0871f7a23eb4742a"],"state_sha256":"e4fda16428225654a4971fd7234364f70e2b6d4e0b4bf05089a36477150ef4b2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ByTbggrtzXlu5QuSgD5YrWj+UeET3zHvR+ZtoqKbXvMm/xn/wG68hBfRXjSEXr5uT78OfRjzYPXBecevl+cOCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T09:06:38.157415Z","bundle_sha256":"87f59a77cf94c87ea8c10a7787a3b494e3caf6148e067415e81f71ec2199c315"}}