{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:4CEWOVYNA6WBBQKOAQIFLKRC6X","short_pith_number":"pith:4CEWOVYN","canonical_record":{"source":{"id":"1301.5003","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-01-21T21:06:23Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"7e2701e6fa8c1bc7531da0f935d2391ad089a4128034b2baf704c57be074d328","abstract_canon_sha256":"a818a2b43a178b2ca438b867fcd1b623c5640ee1957bb73e62132bf4a0c1db6d"},"schema_version":"1.0"},"canonical_sha256":"e08967570d07ac10c14e041055aa22f5f5c20326f4af72d3183efd314180023d","source":{"kind":"arxiv","id":"1301.5003","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.5003","created_at":"2026-05-18T03:35:53Z"},{"alias_kind":"arxiv_version","alias_value":"1301.5003v1","created_at":"2026-05-18T03:35:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.5003","created_at":"2026-05-18T03:35:53Z"},{"alias_kind":"pith_short_12","alias_value":"4CEWOVYNA6WB","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"4CEWOVYNA6WBBQKO","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"4CEWOVYN","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:4CEWOVYNA6WBBQKOAQIFLKRC6X","target":"record","payload":{"canonical_record":{"source":{"id":"1301.5003","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-01-21T21:06:23Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"7e2701e6fa8c1bc7531da0f935d2391ad089a4128034b2baf704c57be074d328","abstract_canon_sha256":"a818a2b43a178b2ca438b867fcd1b623c5640ee1957bb73e62132bf4a0c1db6d"},"schema_version":"1.0"},"canonical_sha256":"e08967570d07ac10c14e041055aa22f5f5c20326f4af72d3183efd314180023d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:35:53.368445Z","signature_b64":"jHuarkCbEctr8leJnvej5aYQMVHjdgm5iYy4TZZHhxPgglLY+mW1LW40+2lBEBlnUajH0JyRbFaLmt9AG1LoBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e08967570d07ac10c14e041055aa22f5f5c20326f4af72d3183efd314180023d","last_reissued_at":"2026-05-18T03:35:53.367557Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:35:53.367557Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1301.5003","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":"2026-05-18T03:35:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yAIZjNGDEPF1jDSAPHO+PvgQtS7yu3e0Y+3gbgnql0yNOn3eVBJGo1jWRDaX6Sq8wn0+em0NUjUd3bhPOt1wBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T19:45:27.190682Z"},"content_sha256":"95c18bacb891ab6485b69742083edec40c66875f27178bde8b619f10c83f79d2","schema_version":"1.0","event_id":"sha256:95c18bacb891ab6485b69742083edec40c66875f27178bde8b619f10c83f79d2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:4CEWOVYNA6WBBQKOAQIFLKRC6X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Adaptive Interference Suppression for CDMA Systems using Interpolated FIR Filters with Adaptive Interpolators in Multipath Channels","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Raimundo Sampaio-Neto, Rodrigo C. de Lamare","submitted_at":"2013-01-21T21:06:23Z","abstract_excerpt":"In this work we propose an adaptive linear receiver structure based on interpolated finite impulse response (FIR) filters with adaptive interpolators for direct sequence code division multiple access (DS-CDMA) systems in multipath channels. The interpolated minimum mean-squared error (MMSE) and the interpolated constrained minimum variance (CMV) solutions are described for a novel scheme where the interpolator is rendered time-varying in order to mitigate multiple access interference (MAI) and multiple-path propagation effects. Based upon the interpolated MMSE and CMV solutions we present comp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.5003","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":"2026-05-18T03:35:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"83VLXXy5Kp0coGr3sR8ibLgOJL+OF8Cdun096EIeYuNxEK++7w7YCEaSYobjkvFIoUh1z6ACBsJVcfNQxYFPDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T19:45:27.191286Z"},"content_sha256":"88cf0fd27baac3e99eef46c106d8a38696b2dd2b92950c2a00497a2ca9625d1b","schema_version":"1.0","event_id":"sha256:88cf0fd27baac3e99eef46c106d8a38696b2dd2b92950c2a00497a2ca9625d1b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4CEWOVYNA6WBBQKOAQIFLKRC6X/bundle.json","state_url":"https://pith.science/pith/4CEWOVYNA6WBBQKOAQIFLKRC6X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4CEWOVYNA6WBBQKOAQIFLKRC6X/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":"2026-06-08T19:45:27Z","links":{"resolver":"https://pith.science/pith/4CEWOVYNA6WBBQKOAQIFLKRC6X","bundle":"https://pith.science/pith/4CEWOVYNA6WBBQKOAQIFLKRC6X/bundle.json","state":"https://pith.science/pith/4CEWOVYNA6WBBQKOAQIFLKRC6X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4CEWOVYNA6WBBQKOAQIFLKRC6X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:4CEWOVYNA6WBBQKOAQIFLKRC6X","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":"a818a2b43a178b2ca438b867fcd1b623c5640ee1957bb73e62132bf4a0c1db6d","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-01-21T21:06:23Z","title_canon_sha256":"7e2701e6fa8c1bc7531da0f935d2391ad089a4128034b2baf704c57be074d328"},"schema_version":"1.0","source":{"id":"1301.5003","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.5003","created_at":"2026-05-18T03:35:53Z"},{"alias_kind":"arxiv_version","alias_value":"1301.5003v1","created_at":"2026-05-18T03:35:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.5003","created_at":"2026-05-18T03:35:53Z"},{"alias_kind":"pith_short_12","alias_value":"4CEWOVYNA6WB","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"4CEWOVYNA6WBBQKO","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"4CEWOVYN","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:88cf0fd27baac3e99eef46c106d8a38696b2dd2b92950c2a00497a2ca9625d1b","target":"graph","created_at":"2026-05-18T03:35:53Z","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 work we propose an adaptive linear receiver structure based on interpolated finite impulse response (FIR) filters with adaptive interpolators for direct sequence code division multiple access (DS-CDMA) systems in multipath channels. The interpolated minimum mean-squared error (MMSE) and the interpolated constrained minimum variance (CMV) solutions are described for a novel scheme where the interpolator is rendered time-varying in order to mitigate multiple access interference (MAI) and multiple-path propagation effects. Based upon the interpolated MMSE and CMV solutions we present comp","authors_text":"Raimundo Sampaio-Neto, Rodrigo C. de Lamare","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-01-21T21:06:23Z","title":"Adaptive Interference Suppression for CDMA Systems using Interpolated FIR Filters with Adaptive Interpolators in Multipath Channels"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.5003","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":"sha256:95c18bacb891ab6485b69742083edec40c66875f27178bde8b619f10c83f79d2","target":"record","created_at":"2026-05-18T03:35:53Z","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":"a818a2b43a178b2ca438b867fcd1b623c5640ee1957bb73e62132bf4a0c1db6d","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-01-21T21:06:23Z","title_canon_sha256":"7e2701e6fa8c1bc7531da0f935d2391ad089a4128034b2baf704c57be074d328"},"schema_version":"1.0","source":{"id":"1301.5003","kind":"arxiv","version":1}},"canonical_sha256":"e08967570d07ac10c14e041055aa22f5f5c20326f4af72d3183efd314180023d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e08967570d07ac10c14e041055aa22f5f5c20326f4af72d3183efd314180023d","first_computed_at":"2026-05-18T03:35:53.367557Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:35:53.367557Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jHuarkCbEctr8leJnvej5aYQMVHjdgm5iYy4TZZHhxPgglLY+mW1LW40+2lBEBlnUajH0JyRbFaLmt9AG1LoBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:35:53.368445Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.5003","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:95c18bacb891ab6485b69742083edec40c66875f27178bde8b619f10c83f79d2","sha256:88cf0fd27baac3e99eef46c106d8a38696b2dd2b92950c2a00497a2ca9625d1b"],"state_sha256":"70a5cfdbfa53b6a975b19cb41fabe514f0f3f741ca465c99c8beca034fee5c51"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IISDAdXMc3HZWwTlLmfmJ6RIh3gZyzRJDqukudAcautLM3fYwkH4xb6cAotkKCUet1TRc7uTWTkvdf4yQrm/BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T19:45:27.194652Z","bundle_sha256":"8a78e0871b8e8809cf11a95094de2e79fef90f1ec9838864c5d8b9a55cb023cb"}}