{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:ESXADMNLD46YAWTUHBEBPIT7DF","short_pith_number":"pith:ESXADMNL","canonical_record":{"source":{"id":"1102.2506","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2011-02-12T12:28:41Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"7d50f517a9690efda401fd4e85c4e3a2fb2a99fc9cd5bec20cd0b232b36cac6c","abstract_canon_sha256":"80af0961975bcbcfbd7cd1d08e5fa4ed4484e64176bd6d938776f86902bf63b0"},"schema_version":"1.0"},"canonical_sha256":"24ae01b1ab1f3d805a74384817a27f1947a0498808d8111bcf4c21053a76be43","source":{"kind":"arxiv","id":"1102.2506","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.2506","created_at":"2026-05-18T04:28:47Z"},{"alias_kind":"arxiv_version","alias_value":"1102.2506v1","created_at":"2026-05-18T04:28:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.2506","created_at":"2026-05-18T04:28:47Z"},{"alias_kind":"pith_short_12","alias_value":"ESXADMNLD46Y","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"ESXADMNLD46YAWTU","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"ESXADMNL","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:ESXADMNLD46YAWTUHBEBPIT7DF","target":"record","payload":{"canonical_record":{"source":{"id":"1102.2506","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2011-02-12T12:28:41Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"7d50f517a9690efda401fd4e85c4e3a2fb2a99fc9cd5bec20cd0b232b36cac6c","abstract_canon_sha256":"80af0961975bcbcfbd7cd1d08e5fa4ed4484e64176bd6d938776f86902bf63b0"},"schema_version":"1.0"},"canonical_sha256":"24ae01b1ab1f3d805a74384817a27f1947a0498808d8111bcf4c21053a76be43","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:28:47.236730Z","signature_b64":"PC4x4kDMGOx8W/SG3xpJiGdkmx7XNzUauiIUrlP9sAjpYw/VMqwOsEmjQmyxM0DsXuQl9EfDYGpYaFtAf+yHDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24ae01b1ab1f3d805a74384817a27f1947a0498808d8111bcf4c21053a76be43","last_reissued_at":"2026-05-18T04:28:47.236157Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:28:47.236157Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1102.2506","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:28:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s4xV7x6zTeWV/0e0GaSbVXXr4ZHtb8oooqzQDDq0c/OtMZL3ZbDImKCnAy6VFnmyMcQBREsF7Nx8GDeEQvaaDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:12:35.325692Z"},"content_sha256":"170906d7c4d93043c2460b978c8012ffbeec968ac327bc0404a43af358e45b93","schema_version":"1.0","event_id":"sha256:170906d7c4d93043c2460b978c8012ffbeec968ac327bc0404a43af358e45b93"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:ESXADMNLD46YAWTUHBEBPIT7DF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Opportunistic Relaying for Space-Time Coded Cooperation with Multiple Antenna Terminals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Are Hj{\\o}rungnes, Behrouz Maham","submitted_at":"2011-02-12T12:28:41Z","abstract_excerpt":"We consider a wireless relay network with multiple antenna terminals over Rayleigh fading channels, and apply distributed space-time coding (DSTC) in amplify-and-forward (A&F) mode. The A&F scheme is used in a way that each relay transmits a scaled version of the linear combination of the received symbols. It turns out that, combined with power allocation in the relays, A&F DSTC results in an opportunistic relaying scheme, in which only the best relay is selected to retransmit the source's space-time coded signal. Furthermore, assuming the knowledge of source-relay CSI at the source node, we d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.2506","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:28:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"48VcwVVLbLbyXsb1UzflZ9bfoEd9yHaRWn0qESkk9m4RQpjQVStI7O1ngrD1inKyLN/kbzDC6kCyuEEGUFoJCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:12:35.326302Z"},"content_sha256":"1e24c8438fb2715e6d0681225866fb358446a7133247eac0407d5474bc262a19","schema_version":"1.0","event_id":"sha256:1e24c8438fb2715e6d0681225866fb358446a7133247eac0407d5474bc262a19"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ESXADMNLD46YAWTUHBEBPIT7DF/bundle.json","state_url":"https://pith.science/pith/ESXADMNLD46YAWTUHBEBPIT7DF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ESXADMNLD46YAWTUHBEBPIT7DF/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T12:12:35Z","links":{"resolver":"https://pith.science/pith/ESXADMNLD46YAWTUHBEBPIT7DF","bundle":"https://pith.science/pith/ESXADMNLD46YAWTUHBEBPIT7DF/bundle.json","state":"https://pith.science/pith/ESXADMNLD46YAWTUHBEBPIT7DF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ESXADMNLD46YAWTUHBEBPIT7DF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:ESXADMNLD46YAWTUHBEBPIT7DF","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":"80af0961975bcbcfbd7cd1d08e5fa4ed4484e64176bd6d938776f86902bf63b0","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2011-02-12T12:28:41Z","title_canon_sha256":"7d50f517a9690efda401fd4e85c4e3a2fb2a99fc9cd5bec20cd0b232b36cac6c"},"schema_version":"1.0","source":{"id":"1102.2506","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.2506","created_at":"2026-05-18T04:28:47Z"},{"alias_kind":"arxiv_version","alias_value":"1102.2506v1","created_at":"2026-05-18T04:28:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.2506","created_at":"2026-05-18T04:28:47Z"},{"alias_kind":"pith_short_12","alias_value":"ESXADMNLD46Y","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"ESXADMNLD46YAWTU","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"ESXADMNL","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:1e24c8438fb2715e6d0681225866fb358446a7133247eac0407d5474bc262a19","target":"graph","created_at":"2026-05-18T04:28:47Z","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 a wireless relay network with multiple antenna terminals over Rayleigh fading channels, and apply distributed space-time coding (DSTC) in amplify-and-forward (A&F) mode. The A&F scheme is used in a way that each relay transmits a scaled version of the linear combination of the received symbols. It turns out that, combined with power allocation in the relays, A&F DSTC results in an opportunistic relaying scheme, in which only the best relay is selected to retransmit the source's space-time coded signal. Furthermore, assuming the knowledge of source-relay CSI at the source node, we d","authors_text":"Are Hj{\\o}rungnes, Behrouz Maham","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2011-02-12T12:28:41Z","title":"Opportunistic Relaying for Space-Time Coded Cooperation with Multiple Antenna Terminals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.2506","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":"sha256:170906d7c4d93043c2460b978c8012ffbeec968ac327bc0404a43af358e45b93","target":"record","created_at":"2026-05-18T04:28:47Z","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":"80af0961975bcbcfbd7cd1d08e5fa4ed4484e64176bd6d938776f86902bf63b0","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2011-02-12T12:28:41Z","title_canon_sha256":"7d50f517a9690efda401fd4e85c4e3a2fb2a99fc9cd5bec20cd0b232b36cac6c"},"schema_version":"1.0","source":{"id":"1102.2506","kind":"arxiv","version":1}},"canonical_sha256":"24ae01b1ab1f3d805a74384817a27f1947a0498808d8111bcf4c21053a76be43","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24ae01b1ab1f3d805a74384817a27f1947a0498808d8111bcf4c21053a76be43","first_computed_at":"2026-05-18T04:28:47.236157Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:28:47.236157Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PC4x4kDMGOx8W/SG3xpJiGdkmx7XNzUauiIUrlP9sAjpYw/VMqwOsEmjQmyxM0DsXuQl9EfDYGpYaFtAf+yHDg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:28:47.236730Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.2506","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:170906d7c4d93043c2460b978c8012ffbeec968ac327bc0404a43af358e45b93","sha256:1e24c8438fb2715e6d0681225866fb358446a7133247eac0407d5474bc262a19"],"state_sha256":"54c2089ef1556c905e27dc9b2b016bde3ec8fe0b50dc3a97383fde7e4f2c0573"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9dGceB38lo1JGgb1dpz5lFtTcp21v2lO1y4Dc6X5NfhIgMrPIlTX5RQc3OUUGoRu9wY3DualMwXkbBUugYUOCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T12:12:35.329684Z","bundle_sha256":"17ce00db9abe78843c3210af2383e803d4d7411a17a444cad78e5fb548d3c031"}}