{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XAWHSMYG3YX77BSCESW727QRF5","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":"8526452b87286dc56d2c66738c2d0482029cec6e7fab42da4655ad6c88c2fd13","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-01-24T23:47:55Z","title_canon_sha256":"f06c152aff22f9c56b5b61716ad441b1829b46926f09351f5edd47c2cdaaa57c"},"schema_version":"1.0","source":{"id":"1901.08693","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.08693","created_at":"2026-05-17T23:55:33Z"},{"alias_kind":"arxiv_version","alias_value":"1901.08693v1","created_at":"2026-05-17T23:55:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.08693","created_at":"2026-05-17T23:55:33Z"},{"alias_kind":"pith_short_12","alias_value":"XAWHSMYG3YX7","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"XAWHSMYG3YX77BSC","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"XAWHSMYG","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:67559d13090c42d620233543c48b2703147b5f7f152a8fe74fb3f42b9fa29065","target":"graph","created_at":"2026-05-17T23:55:33Z","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":"Due to the heavy reliance of millimeter-wave (mmWave) wireless systems on directional links, beamforming (BF) with high-dimensional arrays is essential for cellular systems in these frequencies. How to perform the array processing in a power efficient manner is a fundamental challenge. Analog and hybrid BF require fewer analog-to-digital and digital-to-analog converters (ADCs and DACs), but can only communicate in a small number of directions at a time, limiting directional search, spatial multiplexing and control signaling. Digital BF enables flexible spatial processing, but must be operated ","authors_text":"Aditya Dhananjay, C. Nicolas Barati, David A. Ramirez, James F. Buckwalter, Sourjya Dutta, Sundeep Rangan","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-01-24T23:47:55Z","title":"A Case for Digital Beamforming at mmWave"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.08693","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:b5c84460f97cfdbdc09c71e31bf0efd5b7015e3548eab72f652626682a83f3eb","target":"record","created_at":"2026-05-17T23:55:33Z","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":"8526452b87286dc56d2c66738c2d0482029cec6e7fab42da4655ad6c88c2fd13","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-01-24T23:47:55Z","title_canon_sha256":"f06c152aff22f9c56b5b61716ad441b1829b46926f09351f5edd47c2cdaaa57c"},"schema_version":"1.0","source":{"id":"1901.08693","kind":"arxiv","version":1}},"canonical_sha256":"b82c793306de2fff864224adfd7e112f6354ed332d67547a31d14d9c3470c414","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b82c793306de2fff864224adfd7e112f6354ed332d67547a31d14d9c3470c414","first_computed_at":"2026-05-17T23:55:33.399583Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:33.399583Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tHvtgOlkzXMmWRjammlc9X8Rd17DSFZpN2EA/Zp1LhWCRO22KOdGdvbdiuYiM+qHAh9iWPRU2OH/OoqR5rP2Aw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:33.400203Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.08693","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b5c84460f97cfdbdc09c71e31bf0efd5b7015e3548eab72f652626682a83f3eb","sha256:67559d13090c42d620233543c48b2703147b5f7f152a8fe74fb3f42b9fa29065"],"state_sha256":"a2a67428fdf61cbfc4b3785eaa0ca6f96d0e8ce7525bc7f1b6595814d4098a71"}