{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:TMMEDJQZD64CMRPHRHUT2CAX3T","short_pith_number":"pith:TMMEDJQZ","canonical_record":{"source":{"id":"1406.0049","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2014-05-31T05:37:00Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"00ac00ba7b3b64caff8dc16c52835928a37b1670d84d3595a0dcc959d83e84b5","abstract_canon_sha256":"3f8bf58c54c0800879decd308857397b0a9cd76170735eb5350865025cd9af52"},"schema_version":"1.0"},"canonical_sha256":"9b1841a6191fb82645e789e93d0817dcec1e1a6f987920b4fcfe1a17ec7a4ae0","source":{"kind":"arxiv","id":"1406.0049","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.0049","created_at":"2026-05-18T02:50:41Z"},{"alias_kind":"arxiv_version","alias_value":"1406.0049v1","created_at":"2026-05-18T02:50:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.0049","created_at":"2026-05-18T02:50:41Z"},{"alias_kind":"pith_short_12","alias_value":"TMMEDJQZD64C","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"TMMEDJQZD64CMRPH","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"TMMEDJQZ","created_at":"2026-05-18T12:28:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:TMMEDJQZD64CMRPHRHUT2CAX3T","target":"record","payload":{"canonical_record":{"source":{"id":"1406.0049","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2014-05-31T05:37:00Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"00ac00ba7b3b64caff8dc16c52835928a37b1670d84d3595a0dcc959d83e84b5","abstract_canon_sha256":"3f8bf58c54c0800879decd308857397b0a9cd76170735eb5350865025cd9af52"},"schema_version":"1.0"},"canonical_sha256":"9b1841a6191fb82645e789e93d0817dcec1e1a6f987920b4fcfe1a17ec7a4ae0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:50:41.948690Z","signature_b64":"gC7rxlmrJkizaKLP/POKY/I5PdfrJZOhUZ8m03eJAMmJ+Cny3RuqzpzfKIY2zXiZadP0yN3xjUDJGDC798gXCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9b1841a6191fb82645e789e93d0817dcec1e1a6f987920b4fcfe1a17ec7a4ae0","last_reissued_at":"2026-05-18T02:50:41.948129Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:50:41.948129Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1406.0049","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":"2026-05-18T02:50:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kwSbVtXjm0npSsyPNVPbS3i1rGiK+tBf8OURty3pkMMl0kRvMYHQhADOWx6lJZKgvqm8MRXvzvHGcVxcuQ6vCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:12:46.604707Z"},"content_sha256":"e3c1a20d218763dc1b183c9362049835d446c0428c10de2071111fb7be12d80b","schema_version":"1.0","event_id":"sha256:e3c1a20d218763dc1b183c9362049835d446c0428c10de2071111fb7be12d80b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:TMMEDJQZD64CMRPHRHUT2CAX3T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ergodic Capacity Comparison of Different Relay Precoding Schemes in Dual-Hop AF Systems with Co-Channel Interference","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Caijun Zhong, Chau Yuen, Guangxu Zhu, Himal A. Suraweera, Rui Yin, Zhaoyang Zhang","submitted_at":"2014-05-31T05:37:00Z","abstract_excerpt":"In this paper, we analyze the ergodic capacity of a dual-hop amplify-and-forward relaying system where the relay is equipped with multiple antennas and subject to co-channel interference (CCI) and the additive white Gaussian noise. Specifically, we consider three heuristic precoding schemes, where the relay first applies the 1) maximal-ratio combining (MRC) 2) zero-forcing (ZF) 3) minimum mean-squared error (MMSE) principle to combine the signal from the source, and then steers the transformed signal towards the destination with the maximum ratio transmission (MRT) technique. For the MRC/MRT a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.0049","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":"2026-05-18T02:50:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RT57cbSz+FyYbjRyXRZ6pho7W3DVQA/UBEIejbiq7JWs2xJRoiOhIzoEaTsLhL7NKtFbpZxTWob/n9URvCUMAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:12:46.605368Z"},"content_sha256":"0391e058664bb062c85100017305b9083c313f1477d9869bffb18bc28c5e4c6a","schema_version":"1.0","event_id":"sha256:0391e058664bb062c85100017305b9083c313f1477d9869bffb18bc28c5e4c6a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TMMEDJQZD64CMRPHRHUT2CAX3T/bundle.json","state_url":"https://pith.science/pith/TMMEDJQZD64CMRPHRHUT2CAX3T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TMMEDJQZD64CMRPHRHUT2CAX3T/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":"2026-05-31T04:12:46Z","links":{"resolver":"https://pith.science/pith/TMMEDJQZD64CMRPHRHUT2CAX3T","bundle":"https://pith.science/pith/TMMEDJQZD64CMRPHRHUT2CAX3T/bundle.json","state":"https://pith.science/pith/TMMEDJQZD64CMRPHRHUT2CAX3T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TMMEDJQZD64CMRPHRHUT2CAX3T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:TMMEDJQZD64CMRPHRHUT2CAX3T","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":"3f8bf58c54c0800879decd308857397b0a9cd76170735eb5350865025cd9af52","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2014-05-31T05:37:00Z","title_canon_sha256":"00ac00ba7b3b64caff8dc16c52835928a37b1670d84d3595a0dcc959d83e84b5"},"schema_version":"1.0","source":{"id":"1406.0049","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.0049","created_at":"2026-05-18T02:50:41Z"},{"alias_kind":"arxiv_version","alias_value":"1406.0049v1","created_at":"2026-05-18T02:50:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.0049","created_at":"2026-05-18T02:50:41Z"},{"alias_kind":"pith_short_12","alias_value":"TMMEDJQZD64C","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"TMMEDJQZD64CMRPH","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"TMMEDJQZ","created_at":"2026-05-18T12:28:49Z"}],"graph_snapshots":[{"event_id":"sha256:0391e058664bb062c85100017305b9083c313f1477d9869bffb18bc28c5e4c6a","target":"graph","created_at":"2026-05-18T02:50:41Z","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 this paper, we analyze the ergodic capacity of a dual-hop amplify-and-forward relaying system where the relay is equipped with multiple antennas and subject to co-channel interference (CCI) and the additive white Gaussian noise. Specifically, we consider three heuristic precoding schemes, where the relay first applies the 1) maximal-ratio combining (MRC) 2) zero-forcing (ZF) 3) minimum mean-squared error (MMSE) principle to combine the signal from the source, and then steers the transformed signal towards the destination with the maximum ratio transmission (MRT) technique. For the MRC/MRT a","authors_text":"Caijun Zhong, Chau Yuen, Guangxu Zhu, Himal A. Suraweera, Rui Yin, Zhaoyang Zhang","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2014-05-31T05:37:00Z","title":"Ergodic Capacity Comparison of Different Relay Precoding Schemes in Dual-Hop AF Systems with Co-Channel Interference"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.0049","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:e3c1a20d218763dc1b183c9362049835d446c0428c10de2071111fb7be12d80b","target":"record","created_at":"2026-05-18T02:50:41Z","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":"3f8bf58c54c0800879decd308857397b0a9cd76170735eb5350865025cd9af52","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2014-05-31T05:37:00Z","title_canon_sha256":"00ac00ba7b3b64caff8dc16c52835928a37b1670d84d3595a0dcc959d83e84b5"},"schema_version":"1.0","source":{"id":"1406.0049","kind":"arxiv","version":1}},"canonical_sha256":"9b1841a6191fb82645e789e93d0817dcec1e1a6f987920b4fcfe1a17ec7a4ae0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9b1841a6191fb82645e789e93d0817dcec1e1a6f987920b4fcfe1a17ec7a4ae0","first_computed_at":"2026-05-18T02:50:41.948129Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:50:41.948129Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gC7rxlmrJkizaKLP/POKY/I5PdfrJZOhUZ8m03eJAMmJ+Cny3RuqzpzfKIY2zXiZadP0yN3xjUDJGDC798gXCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:50:41.948690Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.0049","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e3c1a20d218763dc1b183c9362049835d446c0428c10de2071111fb7be12d80b","sha256:0391e058664bb062c85100017305b9083c313f1477d9869bffb18bc28c5e4c6a"],"state_sha256":"29049ba984f75ebd9af491a4d4b61804c2a2a9301868ee8bd1a71411f38c9e99"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fuYIw8/r8HXpzjWcaDOQy/JvmlZb0pXdQI4aMe5wUXswc92B7wWsrEu5Ev9KSm+l6JnScWQIvWtXq8WSQp8yDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T04:12:46.608803Z","bundle_sha256":"8605d2a7ec2f6f71a1501205d07f84fab31e7379800bb83be6cf01a6d7041bd2"}}