{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:2V4PHPZS2NMLXPCBEI7Q5ESJVL","short_pith_number":"pith:2V4PHPZS","schema_version":"1.0","canonical_sha256":"d578f3bf32d358bbbc41223f0e9249aad6748cdc0df0d57d95076ca55194100d","source":{"kind":"arxiv","id":"1703.03617","version":1},"attestation_state":"computed","paper":{"title":"Symbol-level and Multicast Precoding for Multiuser Multiantenna Downlink: A Survey, Classification and Challenges","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Ashkan Kalantari, Bj\\\"orn Ottersten, Christos Tsinos, Danilo Spano, Dimitrios Christopoulos, Maha Alodeh, Symeon Chatzinotas","submitted_at":"2017-03-10T10:48:48Z","abstract_excerpt":"Precoding has been conventionally considered as an effective means of mitigating the interference and efficiently exploiting the available in the multiantenna downlink channel, where multiple users are simultaneously served with independent information over the same channel resources. The early works in this area were focused on transmitting an individual information stream to each user by constructing weighted linear combinations of symbol blocks (codewords). However, more recent works have moved beyond this traditional view by: i) transmitting distinct data streams to groups of users and ii)"},"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":"1703.03617","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-03-10T10:48:48Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"4f94759b72356cf54618cc615f18f41400ba20b2d9ca45f9018b0d77f60c8546","abstract_canon_sha256":"546be3649f35c062cc9c5218530c1661574390ef617e5ef4a27940a991d025f3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:48:58.524400Z","signature_b64":"ELxLZXo3pniQ9HPzkJYCvx/f19WB0pv8jC60UrEAtwm9j/0f8+Gz3g30Ucq6aGCQ3LDC9BvAzbfi5znWXB2UAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d578f3bf32d358bbbc41223f0e9249aad6748cdc0df0d57d95076ca55194100d","last_reissued_at":"2026-05-18T00:48:58.523776Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:48:58.523776Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Symbol-level and Multicast Precoding for Multiuser Multiantenna Downlink: A Survey, Classification and Challenges","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Ashkan Kalantari, Bj\\\"orn Ottersten, Christos Tsinos, Danilo Spano, Dimitrios Christopoulos, Maha Alodeh, Symeon Chatzinotas","submitted_at":"2017-03-10T10:48:48Z","abstract_excerpt":"Precoding has been conventionally considered as an effective means of mitigating the interference and efficiently exploiting the available in the multiantenna downlink channel, where multiple users are simultaneously served with independent information over the same channel resources. The early works in this area were focused on transmitting an individual information stream to each user by constructing weighted linear combinations of symbol blocks (codewords). However, more recent works have moved beyond this traditional view by: i) transmitting distinct data streams to groups of users and ii)"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.03617","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":"1703.03617","created_at":"2026-05-18T00:48:58.523878+00:00"},{"alias_kind":"arxiv_version","alias_value":"1703.03617v1","created_at":"2026-05-18T00:48:58.523878+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.03617","created_at":"2026-05-18T00:48:58.523878+00:00"},{"alias_kind":"pith_short_12","alias_value":"2V4PHPZS2NML","created_at":"2026-05-18T12:30:55.937587+00:00"},{"alias_kind":"pith_short_16","alias_value":"2V4PHPZS2NMLXPCB","created_at":"2026-05-18T12:30:55.937587+00:00"},{"alias_kind":"pith_short_8","alias_value":"2V4PHPZS","created_at":"2026-05-18T12:30:55.937587+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/2V4PHPZS2NMLXPCBEI7Q5ESJVL","json":"https://pith.science/pith/2V4PHPZS2NMLXPCBEI7Q5ESJVL.json","graph_json":"https://pith.science/api/pith-number/2V4PHPZS2NMLXPCBEI7Q5ESJVL/graph.json","events_json":"https://pith.science/api/pith-number/2V4PHPZS2NMLXPCBEI7Q5ESJVL/events.json","paper":"https://pith.science/paper/2V4PHPZS"},"agent_actions":{"view_html":"https://pith.science/pith/2V4PHPZS2NMLXPCBEI7Q5ESJVL","download_json":"https://pith.science/pith/2V4PHPZS2NMLXPCBEI7Q5ESJVL.json","view_paper":"https://pith.science/paper/2V4PHPZS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1703.03617&json=true","fetch_graph":"https://pith.science/api/pith-number/2V4PHPZS2NMLXPCBEI7Q5ESJVL/graph.json","fetch_events":"https://pith.science/api/pith-number/2V4PHPZS2NMLXPCBEI7Q5ESJVL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2V4PHPZS2NMLXPCBEI7Q5ESJVL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2V4PHPZS2NMLXPCBEI7Q5ESJVL/action/storage_attestation","attest_author":"https://pith.science/pith/2V4PHPZS2NMLXPCBEI7Q5ESJVL/action/author_attestation","sign_citation":"https://pith.science/pith/2V4PHPZS2NMLXPCBEI7Q5ESJVL/action/citation_signature","submit_replication":"https://pith.science/pith/2V4PHPZS2NMLXPCBEI7Q5ESJVL/action/replication_record"}},"created_at":"2026-05-18T00:48:58.523878+00:00","updated_at":"2026-05-18T00:48:58.523878+00:00"}