{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:XNHE2ZI5NULTZBN45WRLTU47MM","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":"9d4501ddc71f2df8b2d42ca1a6a2cab518b89cc2f021b9da2094c372f7c3fa14","cross_cats_sorted":["cs.MM","cs.NI","math.IT"],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"cs.IT","submitted_at":"2014-12-17T09:40:09Z","title_canon_sha256":"81171cb69f2da4b55918cbcacac68e9f3e9cd7e20cd19edc7a6c456002b60bb8"},"schema_version":"1.0","source":{"id":"1412.6130","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.6130","created_at":"2026-05-18T02:30:54Z"},{"alias_kind":"arxiv_version","alias_value":"1412.6130v1","created_at":"2026-05-18T02:30:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.6130","created_at":"2026-05-18T02:30:54Z"},{"alias_kind":"pith_short_12","alias_value":"XNHE2ZI5NULT","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"XNHE2ZI5NULTZBN4","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"XNHE2ZI5","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:0f858cdc81ac19ff9ae21179bbf599fc56063896fb056cc862d211cf95c1074c","target":"graph","created_at":"2026-05-18T02:30:54Z","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":"It is widely recognized that besides the quality of service (QoS), the energy efficiency is also a key parameter in designing and evaluating mobile multimedia communication systems, which has catalyzed great interest in recent literature. In this paper, an energy efficiency model is first proposed for multiple-input multiple-output orthogonal-frequency-division-multiplexing (MIMO-OFDM) mobile multimedia communication systems with statistical QoS constraints. Employing the channel matrix singular-value-decomposition (SVD) method, all subchannels are classified by their channel characteristics. ","authors_text":"Cheng-Xiang Wang, Min Chen, Qiang Li, Tao Han, Xiaohu Ge, Xi Huang, Yuming Wang","cross_cats":["cs.MM","cs.NI","math.IT"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"cs.IT","submitted_at":"2014-12-17T09:40:09Z","title":"Energy Efficiency Optimization for MIMO-OFDM Mobile Multimedia Communication Systems with QoS Constraints"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.6130","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:f3f888b23ee4b2dbba28312a93f2a4c3424d648b13adf73330f7d08afa680c6f","target":"record","created_at":"2026-05-18T02:30:54Z","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":"9d4501ddc71f2df8b2d42ca1a6a2cab518b89cc2f021b9da2094c372f7c3fa14","cross_cats_sorted":["cs.MM","cs.NI","math.IT"],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"cs.IT","submitted_at":"2014-12-17T09:40:09Z","title_canon_sha256":"81171cb69f2da4b55918cbcacac68e9f3e9cd7e20cd19edc7a6c456002b60bb8"},"schema_version":"1.0","source":{"id":"1412.6130","kind":"arxiv","version":1}},"canonical_sha256":"bb4e4d651d6d173c85bceda2b9d39f631f6a4cd14c6e5cbd122293d98aa42b03","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bb4e4d651d6d173c85bceda2b9d39f631f6a4cd14c6e5cbd122293d98aa42b03","first_computed_at":"2026-05-18T02:30:54.353347Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:54.353347Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ngob1WrE1lL/bWwd1I+ob3aQQwFOmYqtoK67gybZHQF2lanMTt7gF1BqZJ5hJyFHJMh+Rl1rJ6H4ThkXVjZ6Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:54.353977Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.6130","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f3f888b23ee4b2dbba28312a93f2a4c3424d648b13adf73330f7d08afa680c6f","sha256:0f858cdc81ac19ff9ae21179bbf599fc56063896fb056cc862d211cf95c1074c"],"state_sha256":"8b9fc8d510599ecc540f1a89babf827c912f95e2d095a5eb71770828978249ac"}