{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:WAQVB7FNFBBTKLQ5UN2XE52YAK","short_pith_number":"pith:WAQVB7FN","schema_version":"1.0","canonical_sha256":"b02150fcad2843352e1da375727758029694c0caac90c1b313058b435bdfa4c8","source":{"kind":"arxiv","id":"1109.0827","version":1},"attestation_state":"computed","paper":{"title":"A Trellis Coded Modulation Scheme for the Fading Relay Channel","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"B. Sundar Rajan, Vijayvaradharaj T Muralidharan","submitted_at":"2011-09-05T08:23:06Z","abstract_excerpt":"A decode and forward protocol based Trellis Coded Modulation (TCM) scheme for the half-duplex relay channel, in a Rayleigh fading environment, is presented. The proposed scheme can achieve any spectral efficiency greater than or equal to one bit per channel use (bpcu). A near-ML decoder for the suggested TCM scheme is proposed. It is shown that the high SNR performance of this near-ML decoder approaches the performance of the optimal ML decoder. The high SNR performance of this near-ML decoder is independent of the strength of the Source-Relay link and approaches the performance of the optimal"},"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":"1109.0827","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2011-09-05T08:23:06Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"b2b8b9ef10544ba769c3a40d6da4f9655a80b19bacfc05835320b58d263484d5","abstract_canon_sha256":"090efd4a6a89288fb029a7d50687df8a92e802efbe1c20b4bad04e72f607f230"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:14:06.562180Z","signature_b64":"i8ochccyj7v1zlXtU033nbty/wcQFyanqyqEp0BJ+cvamFP7fluHz19P/pxdo2bO0X9rKGxIi07IH5e3qeP3DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b02150fcad2843352e1da375727758029694c0caac90c1b313058b435bdfa4c8","last_reissued_at":"2026-05-18T04:14:06.561606Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:14:06.561606Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Trellis Coded Modulation Scheme for the Fading Relay Channel","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"B. Sundar Rajan, Vijayvaradharaj T Muralidharan","submitted_at":"2011-09-05T08:23:06Z","abstract_excerpt":"A decode and forward protocol based Trellis Coded Modulation (TCM) scheme for the half-duplex relay channel, in a Rayleigh fading environment, is presented. The proposed scheme can achieve any spectral efficiency greater than or equal to one bit per channel use (bpcu). A near-ML decoder for the suggested TCM scheme is proposed. It is shown that the high SNR performance of this near-ML decoder approaches the performance of the optimal ML decoder. The high SNR performance of this near-ML decoder is independent of the strength of the Source-Relay link and approaches the performance of the optimal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.0827","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1109.0827","created_at":"2026-05-18T04:14:06.561693+00:00"},{"alias_kind":"arxiv_version","alias_value":"1109.0827v1","created_at":"2026-05-18T04:14:06.561693+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.0827","created_at":"2026-05-18T04:14:06.561693+00:00"},{"alias_kind":"pith_short_12","alias_value":"WAQVB7FNFBBT","created_at":"2026-05-18T12:26:44.992195+00:00"},{"alias_kind":"pith_short_16","alias_value":"WAQVB7FNFBBTKLQ5","created_at":"2026-05-18T12:26:44.992195+00:00"},{"alias_kind":"pith_short_8","alias_value":"WAQVB7FN","created_at":"2026-05-18T12:26:44.992195+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/WAQVB7FNFBBTKLQ5UN2XE52YAK","json":"https://pith.science/pith/WAQVB7FNFBBTKLQ5UN2XE52YAK.json","graph_json":"https://pith.science/api/pith-number/WAQVB7FNFBBTKLQ5UN2XE52YAK/graph.json","events_json":"https://pith.science/api/pith-number/WAQVB7FNFBBTKLQ5UN2XE52YAK/events.json","paper":"https://pith.science/paper/WAQVB7FN"},"agent_actions":{"view_html":"https://pith.science/pith/WAQVB7FNFBBTKLQ5UN2XE52YAK","download_json":"https://pith.science/pith/WAQVB7FNFBBTKLQ5UN2XE52YAK.json","view_paper":"https://pith.science/paper/WAQVB7FN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1109.0827&json=true","fetch_graph":"https://pith.science/api/pith-number/WAQVB7FNFBBTKLQ5UN2XE52YAK/graph.json","fetch_events":"https://pith.science/api/pith-number/WAQVB7FNFBBTKLQ5UN2XE52YAK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WAQVB7FNFBBTKLQ5UN2XE52YAK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WAQVB7FNFBBTKLQ5UN2XE52YAK/action/storage_attestation","attest_author":"https://pith.science/pith/WAQVB7FNFBBTKLQ5UN2XE52YAK/action/author_attestation","sign_citation":"https://pith.science/pith/WAQVB7FNFBBTKLQ5UN2XE52YAK/action/citation_signature","submit_replication":"https://pith.science/pith/WAQVB7FNFBBTKLQ5UN2XE52YAK/action/replication_record"}},"created_at":"2026-05-18T04:14:06.561693+00:00","updated_at":"2026-05-18T04:14:06.561693+00:00"}