{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:GWLW57ODHUSZ3BYA72EAS6TZA7","short_pith_number":"pith:GWLW57OD","schema_version":"1.0","canonical_sha256":"35976efdc33d259d8700fe88097a7907c498ef10f9b5b06d19babc8b703f0ec2","source":{"kind":"arxiv","id":"1509.08844","version":2},"attestation_state":"computed","paper":{"title":"Subverting Massive MIMO by Smart Jamming","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Emil Bj\\\"ornson, Hessam Pirzadeh, S. Mohammad Razavizadeh","submitted_at":"2015-09-29T16:53:51Z","abstract_excerpt":"We consider uplink transmission of a massive multi-user multiple-input multiple-output (MU-MIMO) system in the presence of a smart jammer. The jammer aims to degrade the sum spectral efficiency of the legitimate system by attacking both the training and data transmission phases. First, we derive a closed-form expression for the sum spectral efficiency by taking into account the presence of a smart jammer. Then, we determine how a jammer with a given energy budget should attack the training and data transmission phases to induce the maximum loss to the sum spectral efficiency. Numerical results"},"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":"1509.08844","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-09-29T16:53:51Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"5681a2152398054e9cc698e09b4cbdac44ac29fbfc8f9688251d69010aa3034e","abstract_canon_sha256":"423dd5eccf4d40a6fea2baeca8c33e616c155902ba5088872ea74e9cbb6110a7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:59.953472Z","signature_b64":"ltoqkut0MD/tINSeApFSKDnRxS9a6Ii65Eqf1a8oIor1uEftBFBCMeqttx71djPYUacMIUpokoUP7y0G2g9ABg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"35976efdc33d259d8700fe88097a7907c498ef10f9b5b06d19babc8b703f0ec2","last_reissued_at":"2026-05-18T01:26:59.952861Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:59.952861Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Subverting Massive MIMO by Smart Jamming","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Emil Bj\\\"ornson, Hessam Pirzadeh, S. Mohammad Razavizadeh","submitted_at":"2015-09-29T16:53:51Z","abstract_excerpt":"We consider uplink transmission of a massive multi-user multiple-input multiple-output (MU-MIMO) system in the presence of a smart jammer. The jammer aims to degrade the sum spectral efficiency of the legitimate system by attacking both the training and data transmission phases. First, we derive a closed-form expression for the sum spectral efficiency by taking into account the presence of a smart jammer. Then, we determine how a jammer with a given energy budget should attack the training and data transmission phases to induce the maximum loss to the sum spectral efficiency. Numerical results"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.08844","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":"1509.08844","created_at":"2026-05-18T01:26:59.952961+00:00"},{"alias_kind":"arxiv_version","alias_value":"1509.08844v2","created_at":"2026-05-18T01:26:59.952961+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.08844","created_at":"2026-05-18T01:26:59.952961+00:00"},{"alias_kind":"pith_short_12","alias_value":"GWLW57ODHUSZ","created_at":"2026-05-18T12:29:22.688609+00:00"},{"alias_kind":"pith_short_16","alias_value":"GWLW57ODHUSZ3BYA","created_at":"2026-05-18T12:29:22.688609+00:00"},{"alias_kind":"pith_short_8","alias_value":"GWLW57OD","created_at":"2026-05-18T12:29:22.688609+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/GWLW57ODHUSZ3BYA72EAS6TZA7","json":"https://pith.science/pith/GWLW57ODHUSZ3BYA72EAS6TZA7.json","graph_json":"https://pith.science/api/pith-number/GWLW57ODHUSZ3BYA72EAS6TZA7/graph.json","events_json":"https://pith.science/api/pith-number/GWLW57ODHUSZ3BYA72EAS6TZA7/events.json","paper":"https://pith.science/paper/GWLW57OD"},"agent_actions":{"view_html":"https://pith.science/pith/GWLW57ODHUSZ3BYA72EAS6TZA7","download_json":"https://pith.science/pith/GWLW57ODHUSZ3BYA72EAS6TZA7.json","view_paper":"https://pith.science/paper/GWLW57OD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1509.08844&json=true","fetch_graph":"https://pith.science/api/pith-number/GWLW57ODHUSZ3BYA72EAS6TZA7/graph.json","fetch_events":"https://pith.science/api/pith-number/GWLW57ODHUSZ3BYA72EAS6TZA7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GWLW57ODHUSZ3BYA72EAS6TZA7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GWLW57ODHUSZ3BYA72EAS6TZA7/action/storage_attestation","attest_author":"https://pith.science/pith/GWLW57ODHUSZ3BYA72EAS6TZA7/action/author_attestation","sign_citation":"https://pith.science/pith/GWLW57ODHUSZ3BYA72EAS6TZA7/action/citation_signature","submit_replication":"https://pith.science/pith/GWLW57ODHUSZ3BYA72EAS6TZA7/action/replication_record"}},"created_at":"2026-05-18T01:26:59.952961+00:00","updated_at":"2026-05-18T01:26:59.952961+00:00"}