{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:QGQQFF5AVDULM5URDZUEGHFCGR","short_pith_number":"pith:QGQQFF5A","canonical_record":{"source":{"id":"1201.6034","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-01-29T12:53:19Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"ea856ccd7f903b14d74521d3c94b4da420a5d7fddcc256c9bb6307f4e75fe62a","abstract_canon_sha256":"4274bf6adc9de9961dc7d3c2ae520af2bbc06d4b6c8f4d3632d78f6c12569223"},"schema_version":"1.0"},"canonical_sha256":"81a10297a0a8e8b676911e68431ca23470994c9816b6c0f1c92cfa44d64282e7","source":{"kind":"arxiv","id":"1201.6034","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.6034","created_at":"2026-05-18T04:03:33Z"},{"alias_kind":"arxiv_version","alias_value":"1201.6034v1","created_at":"2026-05-18T04:03:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.6034","created_at":"2026-05-18T04:03:33Z"},{"alias_kind":"pith_short_12","alias_value":"QGQQFF5AVDUL","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"QGQQFF5AVDULM5UR","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"QGQQFF5A","created_at":"2026-05-18T12:27:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:QGQQFF5AVDULM5URDZUEGHFCGR","target":"record","payload":{"canonical_record":{"source":{"id":"1201.6034","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-01-29T12:53:19Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"ea856ccd7f903b14d74521d3c94b4da420a5d7fddcc256c9bb6307f4e75fe62a","abstract_canon_sha256":"4274bf6adc9de9961dc7d3c2ae520af2bbc06d4b6c8f4d3632d78f6c12569223"},"schema_version":"1.0"},"canonical_sha256":"81a10297a0a8e8b676911e68431ca23470994c9816b6c0f1c92cfa44d64282e7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:03:33.926176Z","signature_b64":"4Kwa+UGIQMn+aCNIUYOLC30XdiYCh2RrHxRiTThf2YhmOfUj/Z1FC5oWj1qB27ko4tgV2wotsJrEehT7dBkUAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"81a10297a0a8e8b676911e68431ca23470994c9816b6c0f1c92cfa44d64282e7","last_reissued_at":"2026-05-18T04:03:33.925654Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:03:33.925654Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1201.6034","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":"2026-05-18T04:03:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zsniKgyPIck9VSlk97MQQKsW3uDIGhJZYEVKj9BcYbbK1dnm2q6qJpS8ht/Vi5ZwICX7FxP14IAO1RGkk4EwDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T01:02:47.450090Z"},"content_sha256":"6f72b265578d65877bd86c32dd2e591049ece9d3bfdd7712c87348c98c4b340f","schema_version":"1.0","event_id":"sha256:6f72b265578d65877bd86c32dd2e591049ece9d3bfdd7712c87348c98c4b340f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:QGQQFF5AVDULM5URDZUEGHFCGR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Novel MCMC Based Receiver for Large-Scale Uplink Multiuser MIMO Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"A. Chockalingam, B. Sundar Rajan, N. Ashok Kumar, Tanumay Datta","submitted_at":"2012-01-29T12:53:19Z","abstract_excerpt":"In this paper, we propose low complexity algorithms based on Markov chain Monte Carlo (MCMC) technique for signal detection and channel estimation on the uplink in large scale multiuser multiple input multiple output (MIMO) systems with tens to hundreds of antennas at the base station (BS) and similar number of uplink users. A BS receiver that employs a randomized sampling method (which makes a probabilistic choice between Gibbs sampling and random sampling in each iteration) for detection and a Gibbs sampling based method for channel estimation is proposed. The algorithm proposed for detectio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.6034","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":"2026-05-18T04:03:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4fa1WuT7pDKSKFbS7eeGkCuQc+H4QATf4rZQvTOssGqYeriq72ft/+KXjvTcZQAcpikQ1VFmPeLmtEvmdxndAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T01:02:47.450478Z"},"content_sha256":"cef6a975199c7e7c695b236965237d8fa4fc9a7f9103cfe53d394b692cd4bccd","schema_version":"1.0","event_id":"sha256:cef6a975199c7e7c695b236965237d8fa4fc9a7f9103cfe53d394b692cd4bccd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QGQQFF5AVDULM5URDZUEGHFCGR/bundle.json","state_url":"https://pith.science/pith/QGQQFF5AVDULM5URDZUEGHFCGR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QGQQFF5AVDULM5URDZUEGHFCGR/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":"2026-06-06T01:02:47Z","links":{"resolver":"https://pith.science/pith/QGQQFF5AVDULM5URDZUEGHFCGR","bundle":"https://pith.science/pith/QGQQFF5AVDULM5URDZUEGHFCGR/bundle.json","state":"https://pith.science/pith/QGQQFF5AVDULM5URDZUEGHFCGR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QGQQFF5AVDULM5URDZUEGHFCGR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:QGQQFF5AVDULM5URDZUEGHFCGR","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":"4274bf6adc9de9961dc7d3c2ae520af2bbc06d4b6c8f4d3632d78f6c12569223","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-01-29T12:53:19Z","title_canon_sha256":"ea856ccd7f903b14d74521d3c94b4da420a5d7fddcc256c9bb6307f4e75fe62a"},"schema_version":"1.0","source":{"id":"1201.6034","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.6034","created_at":"2026-05-18T04:03:33Z"},{"alias_kind":"arxiv_version","alias_value":"1201.6034v1","created_at":"2026-05-18T04:03:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.6034","created_at":"2026-05-18T04:03:33Z"},{"alias_kind":"pith_short_12","alias_value":"QGQQFF5AVDUL","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"QGQQFF5AVDULM5UR","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"QGQQFF5A","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:cef6a975199c7e7c695b236965237d8fa4fc9a7f9103cfe53d394b692cd4bccd","target":"graph","created_at":"2026-05-18T04:03:33Z","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":"In this paper, we propose low complexity algorithms based on Markov chain Monte Carlo (MCMC) technique for signal detection and channel estimation on the uplink in large scale multiuser multiple input multiple output (MIMO) systems with tens to hundreds of antennas at the base station (BS) and similar number of uplink users. A BS receiver that employs a randomized sampling method (which makes a probabilistic choice between Gibbs sampling and random sampling in each iteration) for detection and a Gibbs sampling based method for channel estimation is proposed. The algorithm proposed for detectio","authors_text":"A. Chockalingam, B. Sundar Rajan, N. Ashok Kumar, Tanumay Datta","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-01-29T12:53:19Z","title":"A Novel MCMC Based Receiver for Large-Scale Uplink Multiuser MIMO Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.6034","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":"sha256:6f72b265578d65877bd86c32dd2e591049ece9d3bfdd7712c87348c98c4b340f","target":"record","created_at":"2026-05-18T04:03:33Z","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":"4274bf6adc9de9961dc7d3c2ae520af2bbc06d4b6c8f4d3632d78f6c12569223","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-01-29T12:53:19Z","title_canon_sha256":"ea856ccd7f903b14d74521d3c94b4da420a5d7fddcc256c9bb6307f4e75fe62a"},"schema_version":"1.0","source":{"id":"1201.6034","kind":"arxiv","version":1}},"canonical_sha256":"81a10297a0a8e8b676911e68431ca23470994c9816b6c0f1c92cfa44d64282e7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"81a10297a0a8e8b676911e68431ca23470994c9816b6c0f1c92cfa44d64282e7","first_computed_at":"2026-05-18T04:03:33.925654Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:03:33.925654Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4Kwa+UGIQMn+aCNIUYOLC30XdiYCh2RrHxRiTThf2YhmOfUj/Z1FC5oWj1qB27ko4tgV2wotsJrEehT7dBkUAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:03:33.926176Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.6034","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6f72b265578d65877bd86c32dd2e591049ece9d3bfdd7712c87348c98c4b340f","sha256:cef6a975199c7e7c695b236965237d8fa4fc9a7f9103cfe53d394b692cd4bccd"],"state_sha256":"8493fdb7851cda91f9d639b48302e849513905e8efc9fa44723fd36f0ca17a08"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vtoraBin1mubXb8rg/JBwSbfbYTt0H4O4Gvmh3GWLqYzjlmFhXmKgLKxlFJ9+p9MqLhJTVKMgmOo0p+T3TseCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T01:02:47.452626Z","bundle_sha256":"384a5ba5f48846445440d24fd98bc2118d2cd2d8d8a1c782adcb4a54fa46dd99"}}