{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:L5ASPQYQYQC4CYD3IJ4REU4L6V","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":"b68021a695a89d7dd5abd67eef96dcbe99b4d37eed135cdaa263103343f5e734","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-09-16T11:38:08Z","title_canon_sha256":"7afb244e1a0d80e95ab30a1c922bc93dc46902a382afc7263023245d24be780f"},"schema_version":"1.0","source":{"id":"1609.05009","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.05009","created_at":"2026-05-18T00:35:55Z"},{"alias_kind":"arxiv_version","alias_value":"1609.05009v1","created_at":"2026-05-18T00:35:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.05009","created_at":"2026-05-18T00:35:55Z"},{"alias_kind":"pith_short_12","alias_value":"L5ASPQYQYQC4","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"L5ASPQYQYQC4CYD3","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"L5ASPQYQ","created_at":"2026-05-18T12:30:29Z"}],"graph_snapshots":[{"event_id":"sha256:ced811a15592b99e9def2edcaa8c94867c41a1475854d69980c54114a61adc5e","target":"graph","created_at":"2026-05-18T00:35:55Z","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 consider optimal channel shortener design for reduced-state soft-output Viterbi equalizer (RS-SOVE) in single-carrier (SC) systems. To use RS-SOVE, three receiver filters need to be designed: a prefilter, a target response and a feedback filter. The collection of these three filters are commonly referred to as the \\lq\\lq{}channel shortener\\rq\\rq{}. Conventionally, the channel shortener is designed to transform an intersymbol interference (ISI) channel into an equivalent minimum-phase equivalent form. In this paper, we design the channel shortener to maximize a mutual information lower bound","authors_text":"Fredrik Rusek, Harald Kr\\\"oll, Qiuting Huang, Sha Hu","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-09-16T11:38:08Z","title":"Optimal Channel Shortener Design for Reduced-State Soft-Output Viterbi Equalizer in Single-Carrier Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.05009","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":"sha256:9607d6917ab6d0eff43e1d9bbb9cfb34910e63918b238cf2c9185edd4670f55a","target":"record","created_at":"2026-05-18T00:35:55Z","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":"b68021a695a89d7dd5abd67eef96dcbe99b4d37eed135cdaa263103343f5e734","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-09-16T11:38:08Z","title_canon_sha256":"7afb244e1a0d80e95ab30a1c922bc93dc46902a382afc7263023245d24be780f"},"schema_version":"1.0","source":{"id":"1609.05009","kind":"arxiv","version":1}},"canonical_sha256":"5f4127c310c405c1607b427912538bf55b8e6935c1377b8ccdd94d51d22694de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f4127c310c405c1607b427912538bf55b8e6935c1377b8ccdd94d51d22694de","first_computed_at":"2026-05-18T00:35:55.581714Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:35:55.581714Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QY5op+nu6I+Xi3FCAAgqZgFEy2iSNypLcgu1WAEjifINllwr9V5/lo3K9DXF2HXn0RYt6un/Iahwbx6I/2+DBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:35:55.582082Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.05009","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9607d6917ab6d0eff43e1d9bbb9cfb34910e63918b238cf2c9185edd4670f55a","sha256:ced811a15592b99e9def2edcaa8c94867c41a1475854d69980c54114a61adc5e"],"state_sha256":"895f7a8b1ced525741f267d65004b95f491e9cfd574511bc6ce5cc4dc48b9c7d"}