{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:EFCWLKMUPIGN2W4F7P6NRENZCQ","short_pith_number":"pith:EFCWLKMU","schema_version":"1.0","canonical_sha256":"214565a9947a0cdd5b85fbfcd891b91409fe23e3b2f0ef03b2f41ac1bb95b4c0","source":{"kind":"arxiv","id":"0804.2998","version":2},"attestation_state":"computed","paper":{"title":"OFDM based Distributed Space Time Coding for Asynchronous Relay Networks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"B. Sundar Rajan, G. Susinder Rajan","submitted_at":"2008-04-18T11:17:50Z","abstract_excerpt":"Recently Li and Xia have proposed a transmission scheme for wireless relay networks based on the Alamouti space time code and orthogonal frequency division multiplexing to combat the effect of timing errors at the relay nodes. This transmission scheme is amazingly simple and achieves a diversity order of two for any number of relays. Motivated by its simplicity, this scheme is extended to a more general transmission scheme that can achieve full cooperative diversity for any number of relays. The conditions on the distributed space time block code (DSTBC) structure that admit its application in"},"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":"0804.2998","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2008-04-18T11:17:50Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"d80d7ff4a6f1e5723737fa978f363f4a4a1929c406daf31e3a122161d8c1f3c7","abstract_canon_sha256":"f8a525f8d4ce8fb0f3c4f0cfc8d64ce2ea4c2547f111c4dc6f8efef78c502553"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:59:11.835792Z","signature_b64":"8pN83uT/2n6tDYAkdXZRDX6YxoGX+aI/VJUPBBKxhNuuutaJuojZ8dq+tITfJOr6L5UafMywwITMpvMbcky/CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"214565a9947a0cdd5b85fbfcd891b91409fe23e3b2f0ef03b2f41ac1bb95b4c0","last_reissued_at":"2026-05-18T00:59:11.835099Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:59:11.835099Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"OFDM based Distributed Space Time Coding for Asynchronous Relay Networks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"B. Sundar Rajan, G. Susinder Rajan","submitted_at":"2008-04-18T11:17:50Z","abstract_excerpt":"Recently Li and Xia have proposed a transmission scheme for wireless relay networks based on the Alamouti space time code and orthogonal frequency division multiplexing to combat the effect of timing errors at the relay nodes. This transmission scheme is amazingly simple and achieves a diversity order of two for any number of relays. Motivated by its simplicity, this scheme is extended to a more general transmission scheme that can achieve full cooperative diversity for any number of relays. The conditions on the distributed space time block code (DSTBC) structure that admit its application in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.2998","kind":"arxiv","version":2},"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":"0804.2998","created_at":"2026-05-18T00:59:11.835206+00:00"},{"alias_kind":"arxiv_version","alias_value":"0804.2998v2","created_at":"2026-05-18T00:59:11.835206+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.2998","created_at":"2026-05-18T00:59:11.835206+00:00"},{"alias_kind":"pith_short_12","alias_value":"EFCWLKMUPIGN","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_16","alias_value":"EFCWLKMUPIGN2W4F","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_8","alias_value":"EFCWLKMU","created_at":"2026-05-18T12:25:57.157939+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/EFCWLKMUPIGN2W4F7P6NRENZCQ","json":"https://pith.science/pith/EFCWLKMUPIGN2W4F7P6NRENZCQ.json","graph_json":"https://pith.science/api/pith-number/EFCWLKMUPIGN2W4F7P6NRENZCQ/graph.json","events_json":"https://pith.science/api/pith-number/EFCWLKMUPIGN2W4F7P6NRENZCQ/events.json","paper":"https://pith.science/paper/EFCWLKMU"},"agent_actions":{"view_html":"https://pith.science/pith/EFCWLKMUPIGN2W4F7P6NRENZCQ","download_json":"https://pith.science/pith/EFCWLKMUPIGN2W4F7P6NRENZCQ.json","view_paper":"https://pith.science/paper/EFCWLKMU","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0804.2998&json=true","fetch_graph":"https://pith.science/api/pith-number/EFCWLKMUPIGN2W4F7P6NRENZCQ/graph.json","fetch_events":"https://pith.science/api/pith-number/EFCWLKMUPIGN2W4F7P6NRENZCQ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EFCWLKMUPIGN2W4F7P6NRENZCQ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EFCWLKMUPIGN2W4F7P6NRENZCQ/action/storage_attestation","attest_author":"https://pith.science/pith/EFCWLKMUPIGN2W4F7P6NRENZCQ/action/author_attestation","sign_citation":"https://pith.science/pith/EFCWLKMUPIGN2W4F7P6NRENZCQ/action/citation_signature","submit_replication":"https://pith.science/pith/EFCWLKMUPIGN2W4F7P6NRENZCQ/action/replication_record"}},"created_at":"2026-05-18T00:59:11.835206+00:00","updated_at":"2026-05-18T00:59:11.835206+00:00"}