{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:ZUTWEYOZDRKLKHITMIBXGGUF2L","short_pith_number":"pith:ZUTWEYOZ","schema_version":"1.0","canonical_sha256":"cd276261d91c54b51d136203731a85d2d1b1bcced6069d7d4ff301a7b5eb5815","source":{"kind":"arxiv","id":"1912.07813","version":1},"attestation_state":"computed","paper":{"title":"Signal Design for AF Relay Systems using Superposition Coding and Finite-Alphabet Inputs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IT","math.IT"],"primary_cat":"eess.SP","authors_text":"Bohai Li, Branka Vucetic, He Chen, Yonghui Li, Zheng Dong","submitted_at":"2019-12-17T04:20:42Z","abstract_excerpt":"This paper focuses on the signal design in a Gaussian amplify-and-forward (AF) relay system with superposition coding (SC) being applied at the relay, which allows the source and relay to transmit their own information within two time slots. Practical quadrature amplitude modulation (QAM) constellations are adopted at the source and relay. To improve the system error performance, we optimize the weight coefficients adopted at the source and relay to maximize the minimum Euclidean distance of the received composite constellation, subject to their individual average power constraints. The formul"},"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":"1912.07813","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-12-17T04:20:42Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"61fae7ef3e10b242a8f10b58ae5917619528eb159068d63ab4d850f775d41635","abstract_canon_sha256":"26f808499fbaa3bb07f0b2b3e78d4852c2649910457f11f68d088ca4c9d9710a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:26:46.024676Z","signature_b64":"06Nl2eZoevYpfjuclDQmbLpRlBR37apMfbNo/oHMExz4n7EPwlMSaTYgXBAEUKud0VjGQJ/USHHjWgmP3g6jAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cd276261d91c54b51d136203731a85d2d1b1bcced6069d7d4ff301a7b5eb5815","last_reissued_at":"2026-07-05T00:26:46.024264Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:26:46.024264Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Signal Design for AF Relay Systems using Superposition Coding and Finite-Alphabet Inputs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IT","math.IT"],"primary_cat":"eess.SP","authors_text":"Bohai Li, Branka Vucetic, He Chen, Yonghui Li, Zheng Dong","submitted_at":"2019-12-17T04:20:42Z","abstract_excerpt":"This paper focuses on the signal design in a Gaussian amplify-and-forward (AF) relay system with superposition coding (SC) being applied at the relay, which allows the source and relay to transmit their own information within two time slots. Practical quadrature amplitude modulation (QAM) constellations are adopted at the source and relay. To improve the system error performance, we optimize the weight coefficients adopted at the source and relay to maximize the minimum Euclidean distance of the received composite constellation, subject to their individual average power constraints. The formul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.07813","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1912.07813/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"1912.07813","created_at":"2026-07-05T00:26:46.024323+00:00"},{"alias_kind":"arxiv_version","alias_value":"1912.07813v1","created_at":"2026-07-05T00:26:46.024323+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.07813","created_at":"2026-07-05T00:26:46.024323+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZUTWEYOZDRKL","created_at":"2026-07-05T00:26:46.024323+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZUTWEYOZDRKLKHIT","created_at":"2026-07-05T00:26:46.024323+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZUTWEYOZ","created_at":"2026-07-05T00:26:46.024323+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/ZUTWEYOZDRKLKHITMIBXGGUF2L","json":"https://pith.science/pith/ZUTWEYOZDRKLKHITMIBXGGUF2L.json","graph_json":"https://pith.science/api/pith-number/ZUTWEYOZDRKLKHITMIBXGGUF2L/graph.json","events_json":"https://pith.science/api/pith-number/ZUTWEYOZDRKLKHITMIBXGGUF2L/events.json","paper":"https://pith.science/paper/ZUTWEYOZ"},"agent_actions":{"view_html":"https://pith.science/pith/ZUTWEYOZDRKLKHITMIBXGGUF2L","download_json":"https://pith.science/pith/ZUTWEYOZDRKLKHITMIBXGGUF2L.json","view_paper":"https://pith.science/paper/ZUTWEYOZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1912.07813&json=true","fetch_graph":"https://pith.science/api/pith-number/ZUTWEYOZDRKLKHITMIBXGGUF2L/graph.json","fetch_events":"https://pith.science/api/pith-number/ZUTWEYOZDRKLKHITMIBXGGUF2L/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZUTWEYOZDRKLKHITMIBXGGUF2L/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZUTWEYOZDRKLKHITMIBXGGUF2L/action/storage_attestation","attest_author":"https://pith.science/pith/ZUTWEYOZDRKLKHITMIBXGGUF2L/action/author_attestation","sign_citation":"https://pith.science/pith/ZUTWEYOZDRKLKHITMIBXGGUF2L/action/citation_signature","submit_replication":"https://pith.science/pith/ZUTWEYOZDRKLKHITMIBXGGUF2L/action/replication_record"}},"created_at":"2026-07-05T00:26:46.024323+00:00","updated_at":"2026-07-05T00:26:46.024323+00:00"}