{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:YU556JEPF57SQ6JKBL2WR4CJ56","short_pith_number":"pith:YU556JEP","schema_version":"1.0","canonical_sha256":"c53bdf248f2f7f28792a0af568f049efb8ac0daa2ed7c9738718fd234b024bd9","source":{"kind":"arxiv","id":"1302.4717","version":1},"attestation_state":"computed","paper":{"title":"Channel Sounding Waveforms Design for Asynchronous Multiuser MIMO Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Brett T. Walkenhorst, G. Tong Zhou, Robert J. Baxley, Zhenhua Yu","submitted_at":"2013-02-19T19:43:02Z","abstract_excerpt":"In this paper we provide three contributions to the field of channel sounding waveform design in asynchronous Multi-user (MU) MIMO systems. The first contribution is a derivation of the asynchronous MU-MIMO model and the conditions that the sounding waveform must meet to independently resolve all of the spatial channel responses. Next we propose a chirp waveform that meets the constraints and we show that the MSE of our system meets the Cramer-Rao Bound (CRB) when the time offset is an integer multiple of the sampling interval. Finally we demonstrate that the channel capacity region of the asy"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1302.4717","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-02-19T19:43:02Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"9899b8f4479532a0a04fb0b5a5e8cfe21ff22b997db21aec25a3d11fccc3c9fb","abstract_canon_sha256":"67743b400fe2e1f91b3f3792e618ba6539e9c963143b525d1944caa6aefe90fc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:33:12.399639Z","signature_b64":"PLVlUkomzSTe2fFWlhp9wkhD9DQfJwuLWJzNZrWK1f9P+c9jWZxfrdWnaCx4pxwM18IjOhxJh5k6DWB8FfvjCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c53bdf248f2f7f28792a0af568f049efb8ac0daa2ed7c9738718fd234b024bd9","last_reissued_at":"2026-05-18T03:33:12.398863Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:33:12.398863Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Channel Sounding Waveforms Design for Asynchronous Multiuser MIMO Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Brett T. Walkenhorst, G. Tong Zhou, Robert J. Baxley, Zhenhua Yu","submitted_at":"2013-02-19T19:43:02Z","abstract_excerpt":"In this paper we provide three contributions to the field of channel sounding waveform design in asynchronous Multi-user (MU) MIMO systems. The first contribution is a derivation of the asynchronous MU-MIMO model and the conditions that the sounding waveform must meet to independently resolve all of the spatial channel responses. Next we propose a chirp waveform that meets the constraints and we show that the MSE of our system meets the Cramer-Rao Bound (CRB) when the time offset is an integer multiple of the sampling interval. Finally we demonstrate that the channel capacity region of the asy"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.4717","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1302.4717","created_at":"2026-05-18T03:33:12.398982+00:00"},{"alias_kind":"arxiv_version","alias_value":"1302.4717v1","created_at":"2026-05-18T03:33:12.398982+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.4717","created_at":"2026-05-18T03:33:12.398982+00:00"},{"alias_kind":"pith_short_12","alias_value":"YU556JEPF57S","created_at":"2026-05-18T12:28:09.283467+00:00"},{"alias_kind":"pith_short_16","alias_value":"YU556JEPF57SQ6JK","created_at":"2026-05-18T12:28:09.283467+00:00"},{"alias_kind":"pith_short_8","alias_value":"YU556JEP","created_at":"2026-05-18T12:28:09.283467+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/YU556JEPF57SQ6JKBL2WR4CJ56","json":"https://pith.science/pith/YU556JEPF57SQ6JKBL2WR4CJ56.json","graph_json":"https://pith.science/api/pith-number/YU556JEPF57SQ6JKBL2WR4CJ56/graph.json","events_json":"https://pith.science/api/pith-number/YU556JEPF57SQ6JKBL2WR4CJ56/events.json","paper":"https://pith.science/paper/YU556JEP"},"agent_actions":{"view_html":"https://pith.science/pith/YU556JEPF57SQ6JKBL2WR4CJ56","download_json":"https://pith.science/pith/YU556JEPF57SQ6JKBL2WR4CJ56.json","view_paper":"https://pith.science/paper/YU556JEP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1302.4717&json=true","fetch_graph":"https://pith.science/api/pith-number/YU556JEPF57SQ6JKBL2WR4CJ56/graph.json","fetch_events":"https://pith.science/api/pith-number/YU556JEPF57SQ6JKBL2WR4CJ56/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YU556JEPF57SQ6JKBL2WR4CJ56/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YU556JEPF57SQ6JKBL2WR4CJ56/action/storage_attestation","attest_author":"https://pith.science/pith/YU556JEPF57SQ6JKBL2WR4CJ56/action/author_attestation","sign_citation":"https://pith.science/pith/YU556JEPF57SQ6JKBL2WR4CJ56/action/citation_signature","submit_replication":"https://pith.science/pith/YU556JEPF57SQ6JKBL2WR4CJ56/action/replication_record"}},"created_at":"2026-05-18T03:33:12.398982+00:00","updated_at":"2026-05-18T03:33:12.398982+00:00"}