{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:6LXBFUVN4XWFEYOXUADBOJ4VD7","short_pith_number":"pith:6LXBFUVN","canonical_record":{"source":{"id":"1705.05217","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-05-03T01:49:40Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"efac42ee66f23944cc78054f023507f6252f6dabe4d4bda40d30a1533106fe1b","abstract_canon_sha256":"fd16b1df10b07d83ce96940cc3e1033ad3da644fa9741165af7fcaf53c059b30"},"schema_version":"1.0"},"canonical_sha256":"f2ee12d2ade5ec5261d7a0061727951fe09db0de0b76e06006c92219512d1075","source":{"kind":"arxiv","id":"1705.05217","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.05217","created_at":"2026-05-18T00:32:01Z"},{"alias_kind":"arxiv_version","alias_value":"1705.05217v2","created_at":"2026-05-18T00:32:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.05217","created_at":"2026-05-18T00:32:01Z"},{"alias_kind":"pith_short_12","alias_value":"6LXBFUVN4XWF","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6LXBFUVN4XWFEYOX","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6LXBFUVN","created_at":"2026-05-18T12:31:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:6LXBFUVN4XWFEYOXUADBOJ4VD7","target":"record","payload":{"canonical_record":{"source":{"id":"1705.05217","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-05-03T01:49:40Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"efac42ee66f23944cc78054f023507f6252f6dabe4d4bda40d30a1533106fe1b","abstract_canon_sha256":"fd16b1df10b07d83ce96940cc3e1033ad3da644fa9741165af7fcaf53c059b30"},"schema_version":"1.0"},"canonical_sha256":"f2ee12d2ade5ec5261d7a0061727951fe09db0de0b76e06006c92219512d1075","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:32:01.114853Z","signature_b64":"8EdQ0Ap3o9olIjiVoOMAM218LaI67luNupqd56w0WQIBvSSLGlNoN2qEgrq2CdMfv4gJgwimegoWbku9d+2mCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f2ee12d2ade5ec5261d7a0061727951fe09db0de0b76e06006c92219512d1075","last_reissued_at":"2026-05-18T00:32:01.114454Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:32:01.114454Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.05217","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:32:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YWJsmANnNVtghPJBgHs4YFgjM0e9FrA/C+vwFAakuc2sdD3GCNYsxs4YW56YgQyJtlSQcMr2DgMgGJilaHmJDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T16:53:07.409824Z"},"content_sha256":"638a2cc49467112e27ffbb74001540db6af24d45e1f647eaf335e92d601b9eb2","schema_version":"1.0","event_id":"sha256:638a2cc49467112e27ffbb74001540db6af24d45e1f647eaf335e92d601b9eb2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:6LXBFUVN4XWFEYOXUADBOJ4VD7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Complex Block Floating-Point Format with Box Encoding For Wordlength Reduction in Communication Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Alan Gatherer, Brian L. Evans, Yeong Foong Choo","submitted_at":"2017-05-03T01:49:40Z","abstract_excerpt":"We propose a new complex block floating-point format to reduce implementation complexity. The new format achieves wordlength reduction by sharing an exponent across the block of samples, and uses box encoding for the shared exponent to reduce quantization error. Arithmetic operations are performed on blocks of samples at time, which can also reduce implementation complexity. For a case study of a baseband quadrature amplitude modulation (QAM) transmitter and receiver, we quantify the tradeoffs in signal quality vs. implementation complexity using the new approach to represent IQ samples. Signa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.05217","kind":"arxiv","version":2},"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":"2026-05-18T00:32:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ciHRGSu1+CKJbyDjHt4LaoorulKw5rtJB0MczsTdkVdQD7i2hMoOhECxXqyJJnkzOJrIQtqtevfN6NOiobucBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T16:53:07.410174Z"},"content_sha256":"2f956b25eec470354327c005e06652002db91bc1572ab2e01d127ab65ac0ab24","schema_version":"1.0","event_id":"sha256:2f956b25eec470354327c005e06652002db91bc1572ab2e01d127ab65ac0ab24"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6LXBFUVN4XWFEYOXUADBOJ4VD7/bundle.json","state_url":"https://pith.science/pith/6LXBFUVN4XWFEYOXUADBOJ4VD7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6LXBFUVN4XWFEYOXUADBOJ4VD7/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":"2026-06-21T16:53:07Z","links":{"resolver":"https://pith.science/pith/6LXBFUVN4XWFEYOXUADBOJ4VD7","bundle":"https://pith.science/pith/6LXBFUVN4XWFEYOXUADBOJ4VD7/bundle.json","state":"https://pith.science/pith/6LXBFUVN4XWFEYOXUADBOJ4VD7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6LXBFUVN4XWFEYOXUADBOJ4VD7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:6LXBFUVN4XWFEYOXUADBOJ4VD7","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":"fd16b1df10b07d83ce96940cc3e1033ad3da644fa9741165af7fcaf53c059b30","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-05-03T01:49:40Z","title_canon_sha256":"efac42ee66f23944cc78054f023507f6252f6dabe4d4bda40d30a1533106fe1b"},"schema_version":"1.0","source":{"id":"1705.05217","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.05217","created_at":"2026-05-18T00:32:01Z"},{"alias_kind":"arxiv_version","alias_value":"1705.05217v2","created_at":"2026-05-18T00:32:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.05217","created_at":"2026-05-18T00:32:01Z"},{"alias_kind":"pith_short_12","alias_value":"6LXBFUVN4XWF","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6LXBFUVN4XWFEYOX","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6LXBFUVN","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:2f956b25eec470354327c005e06652002db91bc1572ab2e01d127ab65ac0ab24","target":"graph","created_at":"2026-05-18T00:32:01Z","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 propose a new complex block floating-point format to reduce implementation complexity. The new format achieves wordlength reduction by sharing an exponent across the block of samples, and uses box encoding for the shared exponent to reduce quantization error. Arithmetic operations are performed on blocks of samples at time, which can also reduce implementation complexity. For a case study of a baseband quadrature amplitude modulation (QAM) transmitter and receiver, we quantify the tradeoffs in signal quality vs. implementation complexity using the new approach to represent IQ samples. Signa","authors_text":"Alan Gatherer, Brian L. Evans, Yeong Foong Choo","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-05-03T01:49:40Z","title":"Complex Block Floating-Point Format with Box Encoding For Wordlength Reduction in Communication Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.05217","kind":"arxiv","version":2},"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":"sha256:638a2cc49467112e27ffbb74001540db6af24d45e1f647eaf335e92d601b9eb2","target":"record","created_at":"2026-05-18T00:32:01Z","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":"fd16b1df10b07d83ce96940cc3e1033ad3da644fa9741165af7fcaf53c059b30","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-05-03T01:49:40Z","title_canon_sha256":"efac42ee66f23944cc78054f023507f6252f6dabe4d4bda40d30a1533106fe1b"},"schema_version":"1.0","source":{"id":"1705.05217","kind":"arxiv","version":2}},"canonical_sha256":"f2ee12d2ade5ec5261d7a0061727951fe09db0de0b76e06006c92219512d1075","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2ee12d2ade5ec5261d7a0061727951fe09db0de0b76e06006c92219512d1075","first_computed_at":"2026-05-18T00:32:01.114454Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:01.114454Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8EdQ0Ap3o9olIjiVoOMAM218LaI67luNupqd56w0WQIBvSSLGlNoN2qEgrq2CdMfv4gJgwimegoWbku9d+2mCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:01.114853Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.05217","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:638a2cc49467112e27ffbb74001540db6af24d45e1f647eaf335e92d601b9eb2","sha256:2f956b25eec470354327c005e06652002db91bc1572ab2e01d127ab65ac0ab24"],"state_sha256":"4e621c1f123ca20e03d8a847f9246d7d930a2a17cc2d7c9afd97b62e5b218069"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R2Edn5lfqb9ugPFHkuzEetUHEMUk1prQsowOjjz7dK6ur9LwRPu5iWCiwOb6cKMudKN9Jz2nQ7makZaD5p5CCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T16:53:07.412160Z","bundle_sha256":"0065061295f389b922b7f79ac28e837605d0640f3a6b72321af1d80f65e75b00"}}