{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:QMUKALBV626Z32Q5BO5CFPPCOJ","short_pith_number":"pith:QMUKALBV","canonical_record":{"source":{"id":"1111.0704","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2011-11-03T01:12:49Z","cross_cats_sorted":[],"title_canon_sha256":"342d9b33e785c1ed59b6ea4a68ab9ab4834e6f7e003c72f6b062b824fab9b3a0","abstract_canon_sha256":"ce0e41342c8a9dadf1ed032212079b2da6133bd73a925ec77266d7559dc8a1cc"},"schema_version":"1.0"},"canonical_sha256":"8328a02c35f6bd9dea1d0bba22bde27276d53016765d38f0f747c2a1ec7bfb31","source":{"kind":"arxiv","id":"1111.0704","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.0704","created_at":"2026-05-18T04:09:37Z"},{"alias_kind":"arxiv_version","alias_value":"1111.0704v1","created_at":"2026-05-18T04:09:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.0704","created_at":"2026-05-18T04:09:37Z"},{"alias_kind":"pith_short_12","alias_value":"QMUKALBV626Z","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QMUKALBV626Z32Q5","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QMUKALBV","created_at":"2026-05-18T12:26:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:QMUKALBV626Z32Q5BO5CFPPCOJ","target":"record","payload":{"canonical_record":{"source":{"id":"1111.0704","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2011-11-03T01:12:49Z","cross_cats_sorted":[],"title_canon_sha256":"342d9b33e785c1ed59b6ea4a68ab9ab4834e6f7e003c72f6b062b824fab9b3a0","abstract_canon_sha256":"ce0e41342c8a9dadf1ed032212079b2da6133bd73a925ec77266d7559dc8a1cc"},"schema_version":"1.0"},"canonical_sha256":"8328a02c35f6bd9dea1d0bba22bde27276d53016765d38f0f747c2a1ec7bfb31","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:09:37.101695Z","signature_b64":"abDfcyV4L9QKiQitGv+vtS1oXl6kfjZJsH5ka4Dx+UIGCjyW7L+Jw6SpOlEjGclA6ZV7QFtCcKCfqvlMpKr9Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8328a02c35f6bd9dea1d0bba22bde27276d53016765d38f0f747c2a1ec7bfb31","last_reissued_at":"2026-05-18T04:09:37.101050Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:09:37.101050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.0704","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":"2026-05-18T04:09:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bhWx5Se7eMORDj+X+zW6Gk2VLEYrBPgp+TJSnAVxdOsDutZYcn/7jsGC2DImzx/IlZV91AO9h+B2RXLlhNaqCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T22:43:50.842464Z"},"content_sha256":"4fd21aae6286a61e2d3cb2f49a3db1a209444236d730c6da947f4f8a60895b22","schema_version":"1.0","event_id":"sha256:4fd21aae6286a61e2d3cb2f49a3db1a209444236d730c6da947f4f8a60895b22"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:QMUKALBV626Z32Q5BO5CFPPCOJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reduced-Latency SC Polar Decoder Architectures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.AR","authors_text":"Bo Yuan, Chuan Zhang, Keshab K. Parhi","submitted_at":"2011-11-03T01:12:49Z","abstract_excerpt":"Polar codes have become one of the most favorable capacity achieving error correction codes (ECC) along with their simple encoding method. However, among the very few prior successive cancellation (SC) polar decoder designs, the required long code length makes the decoding latency high. In this paper, conventional decoding algorithm is transformed with look-ahead techniques. This reduces the decoding latency by 50%. With pipelining and parallel processing schemes, a parallel SC polar decoder is proposed. Sub-structure sharing approach is employed to design the merged processing element (PE). M"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.0704","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":"2026-05-18T04:09:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"98vJ+cT8xoTwfQ+YvFxy8y+0xPrABK0D8GHHRS+IskZ/pFDQaYlJMao+9dFSUx2BbelomCxMN/ksgbucYK1VBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T22:43:50.842804Z"},"content_sha256":"6f4532d03ebd8a2be18b67123eefc11e7cbbbf45f6051a6989b28533da189247","schema_version":"1.0","event_id":"sha256:6f4532d03ebd8a2be18b67123eefc11e7cbbbf45f6051a6989b28533da189247"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QMUKALBV626Z32Q5BO5CFPPCOJ/bundle.json","state_url":"https://pith.science/pith/QMUKALBV626Z32Q5BO5CFPPCOJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QMUKALBV626Z32Q5BO5CFPPCOJ/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":"2026-06-27T22:43:50Z","links":{"resolver":"https://pith.science/pith/QMUKALBV626Z32Q5BO5CFPPCOJ","bundle":"https://pith.science/pith/QMUKALBV626Z32Q5BO5CFPPCOJ/bundle.json","state":"https://pith.science/pith/QMUKALBV626Z32Q5BO5CFPPCOJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QMUKALBV626Z32Q5BO5CFPPCOJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:QMUKALBV626Z32Q5BO5CFPPCOJ","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":"ce0e41342c8a9dadf1ed032212079b2da6133bd73a925ec77266d7559dc8a1cc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2011-11-03T01:12:49Z","title_canon_sha256":"342d9b33e785c1ed59b6ea4a68ab9ab4834e6f7e003c72f6b062b824fab9b3a0"},"schema_version":"1.0","source":{"id":"1111.0704","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.0704","created_at":"2026-05-18T04:09:37Z"},{"alias_kind":"arxiv_version","alias_value":"1111.0704v1","created_at":"2026-05-18T04:09:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.0704","created_at":"2026-05-18T04:09:37Z"},{"alias_kind":"pith_short_12","alias_value":"QMUKALBV626Z","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QMUKALBV626Z32Q5","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QMUKALBV","created_at":"2026-05-18T12:26:39Z"}],"graph_snapshots":[{"event_id":"sha256:6f4532d03ebd8a2be18b67123eefc11e7cbbbf45f6051a6989b28533da189247","target":"graph","created_at":"2026-05-18T04:09:37Z","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":"Polar codes have become one of the most favorable capacity achieving error correction codes (ECC) along with their simple encoding method. However, among the very few prior successive cancellation (SC) polar decoder designs, the required long code length makes the decoding latency high. In this paper, conventional decoding algorithm is transformed with look-ahead techniques. This reduces the decoding latency by 50%. With pipelining and parallel processing schemes, a parallel SC polar decoder is proposed. Sub-structure sharing approach is employed to design the merged processing element (PE). M","authors_text":"Bo Yuan, Chuan Zhang, Keshab K. Parhi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2011-11-03T01:12:49Z","title":"Reduced-Latency SC Polar Decoder Architectures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.0704","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":"sha256:4fd21aae6286a61e2d3cb2f49a3db1a209444236d730c6da947f4f8a60895b22","target":"record","created_at":"2026-05-18T04:09:37Z","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":"ce0e41342c8a9dadf1ed032212079b2da6133bd73a925ec77266d7559dc8a1cc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2011-11-03T01:12:49Z","title_canon_sha256":"342d9b33e785c1ed59b6ea4a68ab9ab4834e6f7e003c72f6b062b824fab9b3a0"},"schema_version":"1.0","source":{"id":"1111.0704","kind":"arxiv","version":1}},"canonical_sha256":"8328a02c35f6bd9dea1d0bba22bde27276d53016765d38f0f747c2a1ec7bfb31","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8328a02c35f6bd9dea1d0bba22bde27276d53016765d38f0f747c2a1ec7bfb31","first_computed_at":"2026-05-18T04:09:37.101050Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:09:37.101050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"abDfcyV4L9QKiQitGv+vtS1oXl6kfjZJsH5ka4Dx+UIGCjyW7L+Jw6SpOlEjGclA6ZV7QFtCcKCfqvlMpKr9Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:09:37.101695Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.0704","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4fd21aae6286a61e2d3cb2f49a3db1a209444236d730c6da947f4f8a60895b22","sha256:6f4532d03ebd8a2be18b67123eefc11e7cbbbf45f6051a6989b28533da189247"],"state_sha256":"1cc7ac6a709b13655323dca58033bc0ee42696bb9974b0a8b732ea1a832f0e5e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3BvWSRlhvGxqBzo+omOTZwEe29vJtsVAaO5D2ER025cLe/dsqhRBtuiCDWRmB/4UCgLVoNHiA5or7vZtSZaCCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T22:43:50.844675Z","bundle_sha256":"d06d0942ee3d5999aa7365048286b019ba3023547f5d5060848f113028b49e03"}}