{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:OZSUGBG2S6NYFU7BHB2M5KDBKX","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":"edca5af2ce676c84e4c7a3f7af07e1f5420f65e979fead7f77727805965242f0","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-07-10T14:11:33Z","title_canon_sha256":"a7b63b13d94a9888e6319b2f56b4ff216bb8eb3f144732aa01a045a9c2c87de7"},"schema_version":"1.0","source":{"id":"1307.2800","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.2800","created_at":"2026-05-18T00:58:42Z"},{"alias_kind":"arxiv_version","alias_value":"1307.2800v1","created_at":"2026-05-18T00:58:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.2800","created_at":"2026-05-18T00:58:42Z"},{"alias_kind":"pith_short_12","alias_value":"OZSUGBG2S6NY","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"OZSUGBG2S6NYFU7B","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"OZSUGBG2","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:d8f167747ea3734c4e523a77c49f951af06f8c70a667bd8d0a890e4bc77ae4fd","target":"graph","created_at":"2026-05-18T00:58:42Z","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 hybrid automatic repeat request (HARQ) scheme based on a novel class of rate-compatible polar (\\mbox{RCP}) codes are proposed. The RCP codes are constructed by performing punctures and repetitions on the conventional polar codes. Simulation results over binary-input additive white Gaussian noise channels (BAWGNCs) show that, using a low-complexity successive cancellation (SC) decoder, the proposed HARQ scheme performs as well as the existing schemes based on turbo codes and low-density parity-check (LDPC) codes. The proposed transmission scheme is only about 1.0-1.5dB away from the channel c","authors_text":"Jiaru Lin, Kai Chen, Kai Niu","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-07-10T14:11:33Z","title":"A Hybrid ARQ Scheme Based on Polar Codes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.2800","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":"sha256:0dcf6155fbe3f799be6627e775e5d69686ccb6d41b686d6774dc20c32bfc5f30","target":"record","created_at":"2026-05-18T00:58:42Z","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":"edca5af2ce676c84e4c7a3f7af07e1f5420f65e979fead7f77727805965242f0","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-07-10T14:11:33Z","title_canon_sha256":"a7b63b13d94a9888e6319b2f56b4ff216bb8eb3f144732aa01a045a9c2c87de7"},"schema_version":"1.0","source":{"id":"1307.2800","kind":"arxiv","version":1}},"canonical_sha256":"76654304da979b82d3e13874cea86155c78edf33b004e83358b491d07bd3c1ed","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"76654304da979b82d3e13874cea86155c78edf33b004e83358b491d07bd3c1ed","first_computed_at":"2026-05-18T00:58:42.187855Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:58:42.187855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DXS48S8dRexSl3HaHpYmn/J188JqRh8Xg1P2BvSWn2s0BQ+3zs+7gzL8hFTEIztZrxxduXsBbobeI9VO9TomBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:58:42.188483Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.2800","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0dcf6155fbe3f799be6627e775e5d69686ccb6d41b686d6774dc20c32bfc5f30","sha256:d8f167747ea3734c4e523a77c49f951af06f8c70a667bd8d0a890e4bc77ae4fd"],"state_sha256":"fd5e39971379d5ed706eea40bee0e7528056d980153cbe1787b735d995868892"}