{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:3X2HSNU4NJ57XCDDWCQNXGTVSJ","short_pith_number":"pith:3X2HSNU4","schema_version":"1.0","canonical_sha256":"ddf479369c6a7bfb8863b0a0db9a75927267a6d70e0095420720cbcdb30c0268","source":{"kind":"arxiv","id":"1803.06417","version":2},"attestation_state":"computed","paper":{"title":"Coding for Channels with SNR Variation: Spatial Coupling and Efficient Interleaving","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Ahmed Hareedy, Homa Esfahanizadeh, Lara Dolecek, Rick Galbraith, Ruiyi Wu","submitted_at":"2018-03-16T22:07:50Z","abstract_excerpt":"In magnetic-recording systems, consecutive sections experience different signal to noise ratios (SNRs). To perform error correction over these systems, one approach is to use an individual block code for each section. However, the performance over a section affected by a lower SNR is weaker compared to the performance over a section affected by a higher SNR. Spatially-coupled (SC) codes are a family of graph-based codes with capacity approaching performance and low latency decoding. An SC code is constructed by partitioning an underlying block code to several component matrices, and coupling c"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1803.06417","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-03-16T22:07:50Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"183af9fe638703290f12a1bb058caab092544145a36025937883e66f3f8aa689","abstract_canon_sha256":"4559161033b527f538124c125a0b6f40ba5c8b50ee90ebca86b1a373e7651691"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:03.808652Z","signature_b64":"Gbree6ZVTvVUvck38aCzH0bItp5VresOYsuv81ONS7bmxe9O7SWBa5HQqUhb70DGVGzWbtlRDsUAaohGm8rcCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ddf479369c6a7bfb8863b0a0db9a75927267a6d70e0095420720cbcdb30c0268","last_reissued_at":"2026-05-18T00:12:03.807874Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:03.807874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Coding for Channels with SNR Variation: Spatial Coupling and Efficient Interleaving","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Ahmed Hareedy, Homa Esfahanizadeh, Lara Dolecek, Rick Galbraith, Ruiyi Wu","submitted_at":"2018-03-16T22:07:50Z","abstract_excerpt":"In magnetic-recording systems, consecutive sections experience different signal to noise ratios (SNRs). To perform error correction over these systems, one approach is to use an individual block code for each section. However, the performance over a section affected by a lower SNR is weaker compared to the performance over a section affected by a higher SNR. Spatially-coupled (SC) codes are a family of graph-based codes with capacity approaching performance and low latency decoding. An SC code is constructed by partitioning an underlying block code to several component matrices, and coupling c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.06417","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1803.06417","created_at":"2026-05-18T00:12:03.808007+00:00"},{"alias_kind":"arxiv_version","alias_value":"1803.06417v2","created_at":"2026-05-18T00:12:03.808007+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.06417","created_at":"2026-05-18T00:12:03.808007+00:00"},{"alias_kind":"pith_short_12","alias_value":"3X2HSNU4NJ57","created_at":"2026-05-18T12:32:05.422762+00:00"},{"alias_kind":"pith_short_16","alias_value":"3X2HSNU4NJ57XCDD","created_at":"2026-05-18T12:32:05.422762+00:00"},{"alias_kind":"pith_short_8","alias_value":"3X2HSNU4","created_at":"2026-05-18T12:32:05.422762+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3X2HSNU4NJ57XCDDWCQNXGTVSJ","json":"https://pith.science/pith/3X2HSNU4NJ57XCDDWCQNXGTVSJ.json","graph_json":"https://pith.science/api/pith-number/3X2HSNU4NJ57XCDDWCQNXGTVSJ/graph.json","events_json":"https://pith.science/api/pith-number/3X2HSNU4NJ57XCDDWCQNXGTVSJ/events.json","paper":"https://pith.science/paper/3X2HSNU4"},"agent_actions":{"view_html":"https://pith.science/pith/3X2HSNU4NJ57XCDDWCQNXGTVSJ","download_json":"https://pith.science/pith/3X2HSNU4NJ57XCDDWCQNXGTVSJ.json","view_paper":"https://pith.science/paper/3X2HSNU4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1803.06417&json=true","fetch_graph":"https://pith.science/api/pith-number/3X2HSNU4NJ57XCDDWCQNXGTVSJ/graph.json","fetch_events":"https://pith.science/api/pith-number/3X2HSNU4NJ57XCDDWCQNXGTVSJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3X2HSNU4NJ57XCDDWCQNXGTVSJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3X2HSNU4NJ57XCDDWCQNXGTVSJ/action/storage_attestation","attest_author":"https://pith.science/pith/3X2HSNU4NJ57XCDDWCQNXGTVSJ/action/author_attestation","sign_citation":"https://pith.science/pith/3X2HSNU4NJ57XCDDWCQNXGTVSJ/action/citation_signature","submit_replication":"https://pith.science/pith/3X2HSNU4NJ57XCDDWCQNXGTVSJ/action/replication_record"}},"created_at":"2026-05-18T00:12:03.808007+00:00","updated_at":"2026-05-18T00:12:03.808007+00:00"}