{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:Y5CPKNIZPKC624BDE2FQLQAPJC","short_pith_number":"pith:Y5CPKNIZ","canonical_record":{"source":{"id":"1712.01115","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2017-12-01T00:52:50Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"3abec24041080d301fcee93b83329aa4c5ee40242224332ded25c812859b43c6","abstract_canon_sha256":"28131598709456e138fbedfd49e24da3fc340fe635ec3ef440c3533c22b1dd4d"},"schema_version":"1.0"},"canonical_sha256":"c744f535197a85ed7023268b05c00f48a6affa697dae0398a305173bf2f1d1aa","source":{"kind":"arxiv","id":"1712.01115","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.01115","created_at":"2026-05-18T00:28:59Z"},{"alias_kind":"arxiv_version","alias_value":"1712.01115v1","created_at":"2026-05-18T00:28:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.01115","created_at":"2026-05-18T00:28:59Z"},{"alias_kind":"pith_short_12","alias_value":"Y5CPKNIZPKC6","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"Y5CPKNIZPKC624BD","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"Y5CPKNIZ","created_at":"2026-05-18T12:31:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:Y5CPKNIZPKC624BDE2FQLQAPJC","target":"record","payload":{"canonical_record":{"source":{"id":"1712.01115","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2017-12-01T00:52:50Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"3abec24041080d301fcee93b83329aa4c5ee40242224332ded25c812859b43c6","abstract_canon_sha256":"28131598709456e138fbedfd49e24da3fc340fe635ec3ef440c3533c22b1dd4d"},"schema_version":"1.0"},"canonical_sha256":"c744f535197a85ed7023268b05c00f48a6affa697dae0398a305173bf2f1d1aa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:28:59.479781Z","signature_b64":"k7Tw3+wFkajyFIn8D4S76HD6OVuccUUOeZxFi1+5gEwRFku9v3KfjSV18cXmuDJX57AX115pZVNahS8Yi2mcDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c744f535197a85ed7023268b05c00f48a6affa697dae0398a305173bf2f1d1aa","last_reissued_at":"2026-05-18T00:28:59.479273Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:28:59.479273Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.01115","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":"2026-05-18T00:28:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K07U/Ay1UJ82ulxlEtGYfVul2PjoQ1pPwpUU0zrvMF//ijHTbG4nkLo/GiPJ8UAlsMluhNIpc3ZhsivKQBiXBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T12:45:09.788334Z"},"content_sha256":"799b9adc774a8d02b3d65df1c9d78ba95915fe6badfbf50ce1a7fc69fda2604a","schema_version":"1.0","event_id":"sha256:799b9adc774a8d02b3d65df1c9d78ba95915fe6badfbf50ce1a7fc69fda2604a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:Y5CPKNIZPKC624BDE2FQLQAPJC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Study of Robust Distributed Beamforming Based on Cross-Correlation and Subspace Projection Techniques","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IT","math.IT"],"primary_cat":"eess.SP","authors_text":"H. Ruan, R. C. de Lamare","submitted_at":"2017-12-01T00:52:50Z","abstract_excerpt":"In this work, we present a novel robust distributed beamforming (RDB) approach to mitigate the effects of channel errors on wireless networks equipped with relays based on the exploitation of the cross-correlation between the received data from the relays at the destination and the system output. The proposed RDB method, denoted cross-correlation and subspace projection (CCSP) RDB, considers a total relay transmit power constraint in the system and the objective of maximizing the output signal-to-interference-plus-noise ratio (SINR). The relay nodes are equipped with an amplify-and-forward (AF"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.01115","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":"2026-05-18T00:28:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SpsEuE3eCdkzas0wkoZuBWWh+BUAaGP7PEX2azFkfqbIvzf4bPF7dxZSB/EnM16rJgzeLhSfmhm8Y5zHyLOADg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T12:45:09.788695Z"},"content_sha256":"99ec2383486c0857fa3b675fb3fbd02d72fd48b1a9d72229dda5f626eba68adc","schema_version":"1.0","event_id":"sha256:99ec2383486c0857fa3b675fb3fbd02d72fd48b1a9d72229dda5f626eba68adc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y5CPKNIZPKC624BDE2FQLQAPJC/bundle.json","state_url":"https://pith.science/pith/Y5CPKNIZPKC624BDE2FQLQAPJC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y5CPKNIZPKC624BDE2FQLQAPJC/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":"2026-05-20T12:45:09Z","links":{"resolver":"https://pith.science/pith/Y5CPKNIZPKC624BDE2FQLQAPJC","bundle":"https://pith.science/pith/Y5CPKNIZPKC624BDE2FQLQAPJC/bundle.json","state":"https://pith.science/pith/Y5CPKNIZPKC624BDE2FQLQAPJC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y5CPKNIZPKC624BDE2FQLQAPJC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:Y5CPKNIZPKC624BDE2FQLQAPJC","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":"28131598709456e138fbedfd49e24da3fc340fe635ec3ef440c3533c22b1dd4d","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2017-12-01T00:52:50Z","title_canon_sha256":"3abec24041080d301fcee93b83329aa4c5ee40242224332ded25c812859b43c6"},"schema_version":"1.0","source":{"id":"1712.01115","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.01115","created_at":"2026-05-18T00:28:59Z"},{"alias_kind":"arxiv_version","alias_value":"1712.01115v1","created_at":"2026-05-18T00:28:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.01115","created_at":"2026-05-18T00:28:59Z"},{"alias_kind":"pith_short_12","alias_value":"Y5CPKNIZPKC6","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"Y5CPKNIZPKC624BD","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"Y5CPKNIZ","created_at":"2026-05-18T12:31:56Z"}],"graph_snapshots":[{"event_id":"sha256:99ec2383486c0857fa3b675fb3fbd02d72fd48b1a9d72229dda5f626eba68adc","target":"graph","created_at":"2026-05-18T00:28:59Z","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":"In this work, we present a novel robust distributed beamforming (RDB) approach to mitigate the effects of channel errors on wireless networks equipped with relays based on the exploitation of the cross-correlation between the received data from the relays at the destination and the system output. The proposed RDB method, denoted cross-correlation and subspace projection (CCSP) RDB, considers a total relay transmit power constraint in the system and the objective of maximizing the output signal-to-interference-plus-noise ratio (SINR). The relay nodes are equipped with an amplify-and-forward (AF","authors_text":"H. Ruan, R. C. de Lamare","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2017-12-01T00:52:50Z","title":"Study of Robust Distributed Beamforming Based on Cross-Correlation and Subspace Projection Techniques"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.01115","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":"sha256:799b9adc774a8d02b3d65df1c9d78ba95915fe6badfbf50ce1a7fc69fda2604a","target":"record","created_at":"2026-05-18T00:28:59Z","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":"28131598709456e138fbedfd49e24da3fc340fe635ec3ef440c3533c22b1dd4d","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2017-12-01T00:52:50Z","title_canon_sha256":"3abec24041080d301fcee93b83329aa4c5ee40242224332ded25c812859b43c6"},"schema_version":"1.0","source":{"id":"1712.01115","kind":"arxiv","version":1}},"canonical_sha256":"c744f535197a85ed7023268b05c00f48a6affa697dae0398a305173bf2f1d1aa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c744f535197a85ed7023268b05c00f48a6affa697dae0398a305173bf2f1d1aa","first_computed_at":"2026-05-18T00:28:59.479273Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:28:59.479273Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"k7Tw3+wFkajyFIn8D4S76HD6OVuccUUOeZxFi1+5gEwRFku9v3KfjSV18cXmuDJX57AX115pZVNahS8Yi2mcDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:28:59.479781Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.01115","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:799b9adc774a8d02b3d65df1c9d78ba95915fe6badfbf50ce1a7fc69fda2604a","sha256:99ec2383486c0857fa3b675fb3fbd02d72fd48b1a9d72229dda5f626eba68adc"],"state_sha256":"b44344e132be478b6e83a969eeaeae165a718f6dace952fd73708555ee280fea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x2/URm+atOyc2l5bg/E3JiexgTGi7GMizlMNvO5C//ZIptu9/nvxsA7DeLFIjarJjfxt/wqsnZNZbIKh9M8bCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T12:45:09.790773Z","bundle_sha256":"efb9198ff8dc90aff2717aded831d4d5577c3968104d8a63d22d174bb9f4b2eb"}}