{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:AFIRLNGYHORS43Q6UKJYHBP5VS","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":"0e9daa7a14043b05105c902b24f56628f8f9fd1432136d465e19a7d96d3c169c","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-09-16T07:57:27Z","title_canon_sha256":"be7113f4708e72afffa1b00515904f3678cecf943d10539fa1da67687209781f"},"schema_version":"1.0","source":{"id":"1509.04845","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.04845","created_at":"2026-05-18T00:58:10Z"},{"alias_kind":"arxiv_version","alias_value":"1509.04845v1","created_at":"2026-05-18T00:58:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.04845","created_at":"2026-05-18T00:58:10Z"},{"alias_kind":"pith_short_12","alias_value":"AFIRLNGYHORS","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"AFIRLNGYHORS43Q6","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"AFIRLNGY","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:0b04c400b8a73e885d6f4da3f1df5716cdaeb2caf4d692876626d842e73faf2b","target":"graph","created_at":"2026-05-18T00:58:10Z","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":"We consider the use of multiple co-located satellites to improve the spectral efficiency of broadcast transmissions. In particular, we assume that two satellites transmit on overlapping geographical coverage areas, with overlapping frequencies. We first describe the theoretical framework based on network information theory and, in particular, on the theory for multiple access channels. The application to different scenarios will be then considered, including the bandlimited additive white Gaussian noise channel with average power constraint and different models for the nonlinear satellite chan","authors_text":"Alessandro Ugolini, Amina Piemontese, Andrea Modenini, Giulio Colavolpe","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-09-16T07:57:27Z","title":"On the Use of Multiple Satellites to Improve the Spectral Efficiency of Broadcast Transmissions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.04845","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":"sha256:35ed03dfe863727264fa48cdbe84203427c4cb9acf603882439aa01e9c5736c1","target":"record","created_at":"2026-05-18T00:58:10Z","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":"0e9daa7a14043b05105c902b24f56628f8f9fd1432136d465e19a7d96d3c169c","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-09-16T07:57:27Z","title_canon_sha256":"be7113f4708e72afffa1b00515904f3678cecf943d10539fa1da67687209781f"},"schema_version":"1.0","source":{"id":"1509.04845","kind":"arxiv","version":1}},"canonical_sha256":"015115b4d83ba32e6e1ea2938385fdacb3bdbb7a5c4b496765d7fa7a88b5941c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"015115b4d83ba32e6e1ea2938385fdacb3bdbb7a5c4b496765d7fa7a88b5941c","first_computed_at":"2026-05-18T00:58:10.357826Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:58:10.357826Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nv24k+jQn3tZhxao0gSIv0WIYEGRwuX7qOzVk/atj44riMqg+kV5VrUdpYotA7TGYoebmazPDAzaMx9HyVTPAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:58:10.358454Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.04845","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:35ed03dfe863727264fa48cdbe84203427c4cb9acf603882439aa01e9c5736c1","sha256:0b04c400b8a73e885d6f4da3f1df5716cdaeb2caf4d692876626d842e73faf2b"],"state_sha256":"84319607b5b09e16e4417580d6ee4e1d09f38195786c975bbdb248e9171d99d2"}