{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:EEGCOUZTYVPE62E22JRPBQ2OR3","short_pith_number":"pith:EEGCOUZT","canonical_record":{"source":{"id":"1212.4968","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-12-20T10:33:58Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"09067669b8cc4f415bcb3cb8e8ce20b7c7f593b3a8f7417b3f92e29d4d7ecc00","abstract_canon_sha256":"4d3a771596d119b72d337a0ae5a18223b30393487bbb07496423839123cda8d7"},"schema_version":"1.0"},"canonical_sha256":"210c275333c55e4f689ad262f0c34e8ef995216e58f9125405a66615d4379d58","source":{"kind":"arxiv","id":"1212.4968","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.4968","created_at":"2026-05-18T03:13:34Z"},{"alias_kind":"arxiv_version","alias_value":"1212.4968v1","created_at":"2026-05-18T03:13:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.4968","created_at":"2026-05-18T03:13:34Z"},{"alias_kind":"pith_short_12","alias_value":"EEGCOUZTYVPE","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"EEGCOUZTYVPE62E2","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"EEGCOUZT","created_at":"2026-05-18T12:27:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:EEGCOUZTYVPE62E22JRPBQ2OR3","target":"record","payload":{"canonical_record":{"source":{"id":"1212.4968","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-12-20T10:33:58Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"09067669b8cc4f415bcb3cb8e8ce20b7c7f593b3a8f7417b3f92e29d4d7ecc00","abstract_canon_sha256":"4d3a771596d119b72d337a0ae5a18223b30393487bbb07496423839123cda8d7"},"schema_version":"1.0"},"canonical_sha256":"210c275333c55e4f689ad262f0c34e8ef995216e58f9125405a66615d4379d58","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:13:34.071428Z","signature_b64":"hKR+WXGSeLisJtE/3LOubi+O57tGuHnmti3DpGNXdY+K0eSs/Zc0yqJmdzXXKciF+YJA3l6LAGtIFyEoSjF8Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"210c275333c55e4f689ad262f0c34e8ef995216e58f9125405a66615d4379d58","last_reissued_at":"2026-05-18T03:13:34.070705Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:13:34.070705Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.4968","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":"2026-05-18T03:13:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AvsL+Pg5FCj0plZiu+xRXT6hhxtI3rY8qZCJ0MgjcKyMjmU5Ha+vWdgsj3Z5jJVIQ/dXRx9sGnTF/n6t7VfJBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:23:22.125635Z"},"content_sha256":"0177126144493caaa10b6702e8287fc5559a3c612775aa9d131b5b6ef10fa2ce","schema_version":"1.0","event_id":"sha256:0177126144493caaa10b6702e8287fc5559a3c612775aa9d131b5b6ef10fa2ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:EEGCOUZTYVPE62E22JRPBQ2OR3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dual-Polarized Ricean MIMO Channels: Modeling and Performance Assessment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Adrian Ispas, Christian Schneider, Gerd Ascheid, Reiner Thom\\\"a, Xitao Gong","submitted_at":"2012-12-20T10:33:58Z","abstract_excerpt":"In wireless communication systems, dual-polarized (DP) instead of single-polarized (SP) multiple-input multiple-output (MIMO) transmission is used to improve the spectral efficiency under certain conditions on the channel and the signal-to-noise ratio (SNR). In order to identify these conditions, we first propose a novel channel model for DP mobile Ricean MIMO channels for which statistical channel parameters are readily obtained from a moment-based channel decomposition. Second, we derive an approximation of the mutual information (MI), which can be expressed as a function of those statistica"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.4968","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":"2026-05-18T03:13:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rvIegQ/hSUyeK2Esg1vqFOxHznZjgCxBZgu+Td7armm4t5HvdfbHwLyPc+UZ79uOVUhfhjR212VMCouoDQyvBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:23:22.126451Z"},"content_sha256":"000fc0e2085080c64f38e26ddc001484ece2250d85b3f8033a919ed496c58a95","schema_version":"1.0","event_id":"sha256:000fc0e2085080c64f38e26ddc001484ece2250d85b3f8033a919ed496c58a95"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EEGCOUZTYVPE62E22JRPBQ2OR3/bundle.json","state_url":"https://pith.science/pith/EEGCOUZTYVPE62E22JRPBQ2OR3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EEGCOUZTYVPE62E22JRPBQ2OR3/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":"2026-05-30T22:23:22Z","links":{"resolver":"https://pith.science/pith/EEGCOUZTYVPE62E22JRPBQ2OR3","bundle":"https://pith.science/pith/EEGCOUZTYVPE62E22JRPBQ2OR3/bundle.json","state":"https://pith.science/pith/EEGCOUZTYVPE62E22JRPBQ2OR3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EEGCOUZTYVPE62E22JRPBQ2OR3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:EEGCOUZTYVPE62E22JRPBQ2OR3","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":"4d3a771596d119b72d337a0ae5a18223b30393487bbb07496423839123cda8d7","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-12-20T10:33:58Z","title_canon_sha256":"09067669b8cc4f415bcb3cb8e8ce20b7c7f593b3a8f7417b3f92e29d4d7ecc00"},"schema_version":"1.0","source":{"id":"1212.4968","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.4968","created_at":"2026-05-18T03:13:34Z"},{"alias_kind":"arxiv_version","alias_value":"1212.4968v1","created_at":"2026-05-18T03:13:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.4968","created_at":"2026-05-18T03:13:34Z"},{"alias_kind":"pith_short_12","alias_value":"EEGCOUZTYVPE","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"EEGCOUZTYVPE62E2","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"EEGCOUZT","created_at":"2026-05-18T12:27:04Z"}],"graph_snapshots":[{"event_id":"sha256:000fc0e2085080c64f38e26ddc001484ece2250d85b3f8033a919ed496c58a95","target":"graph","created_at":"2026-05-18T03:13:34Z","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 wireless communication systems, dual-polarized (DP) instead of single-polarized (SP) multiple-input multiple-output (MIMO) transmission is used to improve the spectral efficiency under certain conditions on the channel and the signal-to-noise ratio (SNR). In order to identify these conditions, we first propose a novel channel model for DP mobile Ricean MIMO channels for which statistical channel parameters are readily obtained from a moment-based channel decomposition. Second, we derive an approximation of the mutual information (MI), which can be expressed as a function of those statistica","authors_text":"Adrian Ispas, Christian Schneider, Gerd Ascheid, Reiner Thom\\\"a, Xitao Gong","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-12-20T10:33:58Z","title":"Dual-Polarized Ricean MIMO Channels: Modeling and Performance Assessment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.4968","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":"sha256:0177126144493caaa10b6702e8287fc5559a3c612775aa9d131b5b6ef10fa2ce","target":"record","created_at":"2026-05-18T03:13:34Z","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":"4d3a771596d119b72d337a0ae5a18223b30393487bbb07496423839123cda8d7","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-12-20T10:33:58Z","title_canon_sha256":"09067669b8cc4f415bcb3cb8e8ce20b7c7f593b3a8f7417b3f92e29d4d7ecc00"},"schema_version":"1.0","source":{"id":"1212.4968","kind":"arxiv","version":1}},"canonical_sha256":"210c275333c55e4f689ad262f0c34e8ef995216e58f9125405a66615d4379d58","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"210c275333c55e4f689ad262f0c34e8ef995216e58f9125405a66615d4379d58","first_computed_at":"2026-05-18T03:13:34.070705Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:13:34.070705Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hKR+WXGSeLisJtE/3LOubi+O57tGuHnmti3DpGNXdY+K0eSs/Zc0yqJmdzXXKciF+YJA3l6LAGtIFyEoSjF8Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:13:34.071428Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.4968","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0177126144493caaa10b6702e8287fc5559a3c612775aa9d131b5b6ef10fa2ce","sha256:000fc0e2085080c64f38e26ddc001484ece2250d85b3f8033a919ed496c58a95"],"state_sha256":"9dc4be8f2011bbab58e65decd5160a1163820f571d75b8781d69f933945c96a6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i3/tOux58I3cXfPhXcsjzmqghnVfYsSy9CLDNBAqzbGujjxLTEJrWX/dV9tpTOCU45FLHyi6+hHdkZC5hty/Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:23:22.130793Z","bundle_sha256":"a48c1b6e1be535f76c06fab35cce72e61951099edc23a4ed84a6c30b5dfda60e"}}