{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:DTTYAI64IZD6QEB3DJ6A3VRHJI","short_pith_number":"pith:DTTYAI64","canonical_record":{"source":{"id":"1908.08836","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-08-23T14:11:08Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"c6559dae460dbb4f6cd840f9b70572cecbc66a18ccb545ce15dafec110ef4598","abstract_canon_sha256":"5b0810f707fce90ea3c739e4b2a9794a82d2538a8b4a8f2adeb4245569b46f5b"},"schema_version":"1.0"},"canonical_sha256":"1ce78023dc4647e8103b1a7c0dd6274a314cf39b07872637aae0caf723d708c7","source":{"kind":"arxiv","id":"1908.08836","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.08836","created_at":"2026-07-04T23:59:24Z"},{"alias_kind":"arxiv_version","alias_value":"1908.08836v1","created_at":"2026-07-04T23:59:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.08836","created_at":"2026-07-04T23:59:24Z"},{"alias_kind":"pith_short_12","alias_value":"DTTYAI64IZD6","created_at":"2026-07-04T23:59:24Z"},{"alias_kind":"pith_short_16","alias_value":"DTTYAI64IZD6QEB3","created_at":"2026-07-04T23:59:24Z"},{"alias_kind":"pith_short_8","alias_value":"DTTYAI64","created_at":"2026-07-04T23:59:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:DTTYAI64IZD6QEB3DJ6A3VRHJI","target":"record","payload":{"canonical_record":{"source":{"id":"1908.08836","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-08-23T14:11:08Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"c6559dae460dbb4f6cd840f9b70572cecbc66a18ccb545ce15dafec110ef4598","abstract_canon_sha256":"5b0810f707fce90ea3c739e4b2a9794a82d2538a8b4a8f2adeb4245569b46f5b"},"schema_version":"1.0"},"canonical_sha256":"1ce78023dc4647e8103b1a7c0dd6274a314cf39b07872637aae0caf723d708c7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:59:24.429005Z","signature_b64":"b5HA4s0IaDQkMXxG6RSnF1jSN639IfR78S1pBAPHHCrtsR+0reZUK+/UBXrAZ3UA1K7ZfpgLwC7vn4YUEcMcDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1ce78023dc4647e8103b1a7c0dd6274a314cf39b07872637aae0caf723d708c7","last_reissued_at":"2026-07-04T23:59:24.428595Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:59:24.428595Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.08836","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":"2026-07-04T23:59:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d9XUKdH+qiVcnV4ashFmXWIfhrAdebxpBgH0rwM3Tj6AjuHnv0MALEkmEPsw/eyHu14FcBD9D8aFF8r2/YLOCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T07:37:38.385145Z"},"content_sha256":"7bf32e3666408a21f094b9728dc57071bff1ef2fe56cabc3ddce39a829e3291b","schema_version":"1.0","event_id":"sha256:7bf32e3666408a21f094b9728dc57071bff1ef2fe56cabc3ddce39a829e3291b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:DTTYAI64IZD6QEB3DJ6A3VRHJI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Beyond the Channel Capacity of BPSK Input","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Bingli Jiao, Dongsheng Zheng, Mingxi Yin, Yuli Yang","submitted_at":"2019-08-23T14:11:08Z","abstract_excerpt":"The paper proposed a method that organizes a parallel transmission of two signals to be separated from each other at receiver through Hamming- to Euclidean space, where the conventional problem of achievable bit rate (ABR) is converted to that of the ABR's summation with respect to the two separated signals. Actually, the mutual information is separated accordingly into two. Since the mutual information is non-linear function of signal power in general, the separation brings a chance for achieving higher ABR. The proposed work proceeds along the above thinking and achieves higher bit-error-rat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08836","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.08836/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T23:59:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eKjfo8fc0fA5seVPQdo8Op/seM4uCUiJdHpUsyhySzy5xtCWdqm70POVIFHILcvYGv0RdDH+WfbtWrGxqtKYDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T07:37:38.385650Z"},"content_sha256":"dab3bf381d1264e13b26b0acc6a6b86918cba5b28a92ca301a16c2047d1df043","schema_version":"1.0","event_id":"sha256:dab3bf381d1264e13b26b0acc6a6b86918cba5b28a92ca301a16c2047d1df043"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DTTYAI64IZD6QEB3DJ6A3VRHJI/bundle.json","state_url":"https://pith.science/pith/DTTYAI64IZD6QEB3DJ6A3VRHJI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DTTYAI64IZD6QEB3DJ6A3VRHJI/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":"2026-08-16T07:37:38Z","links":{"resolver":"https://pith.science/pith/DTTYAI64IZD6QEB3DJ6A3VRHJI","bundle":"https://pith.science/pith/DTTYAI64IZD6QEB3DJ6A3VRHJI/bundle.json","state":"https://pith.science/pith/DTTYAI64IZD6QEB3DJ6A3VRHJI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DTTYAI64IZD6QEB3DJ6A3VRHJI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:DTTYAI64IZD6QEB3DJ6A3VRHJI","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":"5b0810f707fce90ea3c739e4b2a9794a82d2538a8b4a8f2adeb4245569b46f5b","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-08-23T14:11:08Z","title_canon_sha256":"c6559dae460dbb4f6cd840f9b70572cecbc66a18ccb545ce15dafec110ef4598"},"schema_version":"1.0","source":{"id":"1908.08836","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.08836","created_at":"2026-07-04T23:59:24Z"},{"alias_kind":"arxiv_version","alias_value":"1908.08836v1","created_at":"2026-07-04T23:59:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.08836","created_at":"2026-07-04T23:59:24Z"},{"alias_kind":"pith_short_12","alias_value":"DTTYAI64IZD6","created_at":"2026-07-04T23:59:24Z"},{"alias_kind":"pith_short_16","alias_value":"DTTYAI64IZD6QEB3","created_at":"2026-07-04T23:59:24Z"},{"alias_kind":"pith_short_8","alias_value":"DTTYAI64","created_at":"2026-07-04T23:59:24Z"}],"graph_snapshots":[{"event_id":"sha256:dab3bf381d1264e13b26b0acc6a6b86918cba5b28a92ca301a16c2047d1df043","target":"graph","created_at":"2026-07-04T23:59:24Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1908.08836/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The paper proposed a method that organizes a parallel transmission of two signals to be separated from each other at receiver through Hamming- to Euclidean space, where the conventional problem of achievable bit rate (ABR) is converted to that of the ABR's summation with respect to the two separated signals. Actually, the mutual information is separated accordingly into two. Since the mutual information is non-linear function of signal power in general, the separation brings a chance for achieving higher ABR. The proposed work proceeds along the above thinking and achieves higher bit-error-rat","authors_text":"Bingli Jiao, Dongsheng Zheng, Mingxi Yin, Yuli Yang","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-08-23T14:11:08Z","title":"Beyond the Channel Capacity of BPSK Input"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08836","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":"sha256:7bf32e3666408a21f094b9728dc57071bff1ef2fe56cabc3ddce39a829e3291b","target":"record","created_at":"2026-07-04T23:59:24Z","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":"5b0810f707fce90ea3c739e4b2a9794a82d2538a8b4a8f2adeb4245569b46f5b","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-08-23T14:11:08Z","title_canon_sha256":"c6559dae460dbb4f6cd840f9b70572cecbc66a18ccb545ce15dafec110ef4598"},"schema_version":"1.0","source":{"id":"1908.08836","kind":"arxiv","version":1}},"canonical_sha256":"1ce78023dc4647e8103b1a7c0dd6274a314cf39b07872637aae0caf723d708c7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1ce78023dc4647e8103b1a7c0dd6274a314cf39b07872637aae0caf723d708c7","first_computed_at":"2026-07-04T23:59:24.428595Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:59:24.428595Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b5HA4s0IaDQkMXxG6RSnF1jSN639IfR78S1pBAPHHCrtsR+0reZUK+/UBXrAZ3UA1K7ZfpgLwC7vn4YUEcMcDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T23:59:24.429005Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.08836","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7bf32e3666408a21f094b9728dc57071bff1ef2fe56cabc3ddce39a829e3291b","sha256:dab3bf381d1264e13b26b0acc6a6b86918cba5b28a92ca301a16c2047d1df043"],"state_sha256":"7dae542e7c21bc9071d36cb303da9eeb98771606528a0c765b4c23d5cbcf866d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0WGh4B9r4x21geelMgAEJgbM2WlA477F9q0TNanEKyxZuOWO7IpW+OQKj0MqRSs9JFKEUzPLQKAc6taKCqUQCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T07:37:38.390511Z","bundle_sha256":"bd3fe07327f569204942296ed5cf95ff5c67c2567465b854599f77b93282d62a"}}