{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:HW2TV3HKFBOMYYLGD2BLMK3XSS","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":"5c638ca316a1cc2d7fe0c149b50c75f4060a62be36cd4314aff92e1a84e098b4","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-10-30T09:43:14Z","title_canon_sha256":"990c2b1bac68d668bb9547a7e92efee186cc567b0ab8bcb2857ee300f8b07a3a"},"schema_version":"1.0","source":{"id":"1710.10828","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.10828","created_at":"2026-05-18T00:31:46Z"},{"alias_kind":"arxiv_version","alias_value":"1710.10828v1","created_at":"2026-05-18T00:31:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.10828","created_at":"2026-05-18T00:31:46Z"},{"alias_kind":"pith_short_12","alias_value":"HW2TV3HKFBOM","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"HW2TV3HKFBOMYYLG","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"HW2TV3HK","created_at":"2026-05-18T12:31:21Z"}],"graph_snapshots":[{"event_id":"sha256:10f2672bda8d657fb3c8654d974cf4154dbcba9033a654388e1a1019a02a9257","target":"graph","created_at":"2026-05-18T00:31:46Z","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":"Millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) with hybrid precoding is a promising technique for the future 5G wireless communications. Due to a large number of antennas but a much smaller number of radio frequency (RF) chains, estimating the high-dimensional mmWave massive MIMO channel will bring the large pilot overhead. To overcome this challenge, this paper proposes a super-resolution channel estimation scheme based on two-dimensional (2D) u- nitary ESPRIT algorithm. By exploiting the angular sparsity of mmWave channels, the continuously distributed angle of arriva","authors_text":"Anwen Liao, Hua Wang, Mohamed-Slim Alouini, Yongpeng Wu, Zhen Gao","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-10-30T09:43:14Z","title":"2D Unitary ESPRIT Based Super-Resolution Channel Estimation for Millimeter-Wave Massive MIMO with Hybrid Precoding"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.10828","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":"sha256:404e482c8303b3cfb5a5f5273dde1490b1c3219a8db6a733148c6db878e20c0c","target":"record","created_at":"2026-05-18T00:31:46Z","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":"5c638ca316a1cc2d7fe0c149b50c75f4060a62be36cd4314aff92e1a84e098b4","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-10-30T09:43:14Z","title_canon_sha256":"990c2b1bac68d668bb9547a7e92efee186cc567b0ab8bcb2857ee300f8b07a3a"},"schema_version":"1.0","source":{"id":"1710.10828","kind":"arxiv","version":1}},"canonical_sha256":"3db53aecea285ccc61661e82b62b77948a98148334fe5ea78c1110d49737e4a9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3db53aecea285ccc61661e82b62b77948a98148334fe5ea78c1110d49737e4a9","first_computed_at":"2026-05-18T00:31:46.370274Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:46.370274Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Rm0MB2hYjYsA+iFiz4C6heg0RqBkuhKqnqTjWAe+uaPhjkT2vPiYIMOVcGxN8pEXVpXehzdWxKW+cu4s71N+CA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:46.370790Z","signed_message":"canonical_sha256_bytes"},"source_id":"1710.10828","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:404e482c8303b3cfb5a5f5273dde1490b1c3219a8db6a733148c6db878e20c0c","sha256:10f2672bda8d657fb3c8654d974cf4154dbcba9033a654388e1a1019a02a9257"],"state_sha256":"018e326f03a5000089387f77df7769a2219d1c002a2be491b1f170af5c0e3caa"}