{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:V46DZQPDUJEJQU2L2XSTGV5AY2","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":"ee7a4a37c32ae1ceed71f075f68b2c27440a742528d690a20cb7403fb1fda50b","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-03-23T18:01:07Z","title_canon_sha256":"a6abe46e22ea952b000133a012345f2ce84e1a2a40029e5fedcaa6a67fbb9486"},"schema_version":"1.0","source":{"id":"1503.06751","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.06751","created_at":"2026-05-18T01:35:20Z"},{"alias_kind":"arxiv_version","alias_value":"1503.06751v2","created_at":"2026-05-18T01:35:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.06751","created_at":"2026-05-18T01:35:20Z"},{"alias_kind":"pith_short_12","alias_value":"V46DZQPDUJEJ","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"V46DZQPDUJEJQU2L","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"V46DZQPD","created_at":"2026-05-18T12:29:44Z"}],"graph_snapshots":[{"event_id":"sha256:1f4e1c156ab877d7b47cc4c9b323f7dc9e2b1bc91ccfa1d9067bcdfa1844495d","target":"graph","created_at":"2026-05-18T01:35:20Z","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 joint detection of co-channel signals---specifically, signals which do not possess a natural separability due to, for example, the multiple access technique or the use of multiple antennas. Iterative joint detection and decoding is a well known approach for utilizing the error correction code to improve detection performance. However, the joint maximum a posteriori probability (MAP) detector may be prohibitively complex, especially in a multipath channel. In this paper, we present an approximation to the joint MAP detector motivated by a factor graph model of the received signal. T","authors_text":"Daniel J. Jakubisin, R. Michael Buehrer","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-03-23T18:01:07Z","title":"Approximate Joint MAP Detection of Co-Channel Signals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.06751","kind":"arxiv","version":2},"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":"sha256:3a2fcfbbdb622c6c0964421dcf25f001d6c27284f8ddb69546056c146562ade4","target":"record","created_at":"2026-05-18T01:35:20Z","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":"ee7a4a37c32ae1ceed71f075f68b2c27440a742528d690a20cb7403fb1fda50b","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-03-23T18:01:07Z","title_canon_sha256":"a6abe46e22ea952b000133a012345f2ce84e1a2a40029e5fedcaa6a67fbb9486"},"schema_version":"1.0","source":{"id":"1503.06751","kind":"arxiv","version":2}},"canonical_sha256":"af3c3cc1e3a24898534bd5e53357a0c69d4799ffa397e0719527a46c47fe9175","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"af3c3cc1e3a24898534bd5e53357a0c69d4799ffa397e0719527a46c47fe9175","first_computed_at":"2026-05-18T01:35:20.325971Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:20.325971Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y4kR9k225xIhDM4pJK1YTnEESDdCfv7QTsshs+4DfM5N1x0sxTuNoTQCOzgrnyCMiE3B79Rh660zXrza0lFpBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:20.326667Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.06751","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a2fcfbbdb622c6c0964421dcf25f001d6c27284f8ddb69546056c146562ade4","sha256:1f4e1c156ab877d7b47cc4c9b323f7dc9e2b1bc91ccfa1d9067bcdfa1844495d"],"state_sha256":"4a61901b692742af860bd68a34080e8d81bd41b3f2d89c8ced525fbab2b2a159"}