{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:Y6J6UUWIOICZYODUDO6DLSFQLW","short_pith_number":"pith:Y6J6UUWI","canonical_record":{"source":{"id":"1008.2750","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2010-08-16T19:52:04Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"f42edf5a336d5dfb54d1d18a0e2717ee770230bd78df4091b30138082657d337","abstract_canon_sha256":"20128d018e49d7068c76f92efb366e1b12b628fe633188fd5d9c3df08ce8e9f7"},"schema_version":"1.0"},"canonical_sha256":"c793ea52c872059c38741bbc35c8b05db366258bcd62b14b375a275d29a0adda","source":{"kind":"arxiv","id":"1008.2750","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.2750","created_at":"2026-05-18T03:30:03Z"},{"alias_kind":"arxiv_version","alias_value":"1008.2750v2","created_at":"2026-05-18T03:30:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.2750","created_at":"2026-05-18T03:30:03Z"},{"alias_kind":"pith_short_12","alias_value":"Y6J6UUWIOICZ","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_16","alias_value":"Y6J6UUWIOICZYODU","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_8","alias_value":"Y6J6UUWI","created_at":"2026-05-18T12:26:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:Y6J6UUWIOICZYODUDO6DLSFQLW","target":"record","payload":{"canonical_record":{"source":{"id":"1008.2750","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2010-08-16T19:52:04Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"f42edf5a336d5dfb54d1d18a0e2717ee770230bd78df4091b30138082657d337","abstract_canon_sha256":"20128d018e49d7068c76f92efb366e1b12b628fe633188fd5d9c3df08ce8e9f7"},"schema_version":"1.0"},"canonical_sha256":"c793ea52c872059c38741bbc35c8b05db366258bcd62b14b375a275d29a0adda","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:30:03.266350Z","signature_b64":"PdhMLguASHGaEeZN78wT/8YDiz5BtGKuQhjWN6DE5aHefTXhiwXZo+kPYxoqUA+BuoDgZQFAl2uvxs/R7zzRBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c793ea52c872059c38741bbc35c8b05db366258bcd62b14b375a275d29a0adda","last_reissued_at":"2026-05-18T03:30:03.265541Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:30:03.265541Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1008.2750","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":"2026-05-18T03:30:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gjZ5v+1ckXRNVJCV5N8/BheiChYQ6ik/uOzvB6tJZl7AUa4qTkebDU3ZyMlD+H80585P7CWACy1FVCXOPjx5BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:16:47.842699Z"},"content_sha256":"a72dc9453fec1c1a74997be0b47e7cb31d9e345a73cadb842ea0baabd2d91205","schema_version":"1.0","event_id":"sha256:a72dc9453fec1c1a74997be0b47e7cb31d9e345a73cadb842ea0baabd2d91205"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:Y6J6UUWIOICZYODUDO6DLSFQLW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On BICM receivers for TCM transmission","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Alex Alvarado, Erik Agrell, Leszek Szczecinski","submitted_at":"2010-08-16T19:52:04Z","abstract_excerpt":"Recent results have shown that the performance of bit-interleaved coded modulation (BICM) using convolutional codes in nonfading channels can be significantly improved when the interleaver takes a trivial form (BICM-T), i.e., when it does not interleave the bits at all. In this paper, we give a formal explanation for these results and show that BICM-T is in fact the combination of a TCM transmitter and a BICM receiver. To predict the performance of BICM-T, a new type of distance spectrum for convolutional codes is introduced, analytical bounds based on this spectrum are developed, and asymptot"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.2750","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":"2026-05-18T03:30:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yvP5DUK5ZHal0di/NT06e+pZZQgbHECJkQ7fWAI5Zo3axStfrMZj303vLtDpYTif5K00pdzY1Wc8EpDPcwJ8Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:16:47.843390Z"},"content_sha256":"f4bc600fd0af54a2796f092d55f44f7c74f8a5b5bca72a6fd865c692b3179047","schema_version":"1.0","event_id":"sha256:f4bc600fd0af54a2796f092d55f44f7c74f8a5b5bca72a6fd865c692b3179047"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y6J6UUWIOICZYODUDO6DLSFQLW/bundle.json","state_url":"https://pith.science/pith/Y6J6UUWIOICZYODUDO6DLSFQLW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y6J6UUWIOICZYODUDO6DLSFQLW/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":"2026-05-25T22:16:47Z","links":{"resolver":"https://pith.science/pith/Y6J6UUWIOICZYODUDO6DLSFQLW","bundle":"https://pith.science/pith/Y6J6UUWIOICZYODUDO6DLSFQLW/bundle.json","state":"https://pith.science/pith/Y6J6UUWIOICZYODUDO6DLSFQLW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y6J6UUWIOICZYODUDO6DLSFQLW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:Y6J6UUWIOICZYODUDO6DLSFQLW","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":"20128d018e49d7068c76f92efb366e1b12b628fe633188fd5d9c3df08ce8e9f7","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2010-08-16T19:52:04Z","title_canon_sha256":"f42edf5a336d5dfb54d1d18a0e2717ee770230bd78df4091b30138082657d337"},"schema_version":"1.0","source":{"id":"1008.2750","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.2750","created_at":"2026-05-18T03:30:03Z"},{"alias_kind":"arxiv_version","alias_value":"1008.2750v2","created_at":"2026-05-18T03:30:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.2750","created_at":"2026-05-18T03:30:03Z"},{"alias_kind":"pith_short_12","alias_value":"Y6J6UUWIOICZ","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_16","alias_value":"Y6J6UUWIOICZYODU","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_8","alias_value":"Y6J6UUWI","created_at":"2026-05-18T12:26:17Z"}],"graph_snapshots":[{"event_id":"sha256:f4bc600fd0af54a2796f092d55f44f7c74f8a5b5bca72a6fd865c692b3179047","target":"graph","created_at":"2026-05-18T03:30:03Z","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":"Recent results have shown that the performance of bit-interleaved coded modulation (BICM) using convolutional codes in nonfading channels can be significantly improved when the interleaver takes a trivial form (BICM-T), i.e., when it does not interleave the bits at all. In this paper, we give a formal explanation for these results and show that BICM-T is in fact the combination of a TCM transmitter and a BICM receiver. To predict the performance of BICM-T, a new type of distance spectrum for convolutional codes is introduced, analytical bounds based on this spectrum are developed, and asymptot","authors_text":"Alex Alvarado, Erik Agrell, Leszek Szczecinski","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2010-08-16T19:52:04Z","title":"On BICM receivers for TCM transmission"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.2750","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:a72dc9453fec1c1a74997be0b47e7cb31d9e345a73cadb842ea0baabd2d91205","target":"record","created_at":"2026-05-18T03:30:03Z","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":"20128d018e49d7068c76f92efb366e1b12b628fe633188fd5d9c3df08ce8e9f7","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2010-08-16T19:52:04Z","title_canon_sha256":"f42edf5a336d5dfb54d1d18a0e2717ee770230bd78df4091b30138082657d337"},"schema_version":"1.0","source":{"id":"1008.2750","kind":"arxiv","version":2}},"canonical_sha256":"c793ea52c872059c38741bbc35c8b05db366258bcd62b14b375a275d29a0adda","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c793ea52c872059c38741bbc35c8b05db366258bcd62b14b375a275d29a0adda","first_computed_at":"2026-05-18T03:30:03.265541Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:30:03.265541Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PdhMLguASHGaEeZN78wT/8YDiz5BtGKuQhjWN6DE5aHefTXhiwXZo+kPYxoqUA+BuoDgZQFAl2uvxs/R7zzRBg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:30:03.266350Z","signed_message":"canonical_sha256_bytes"},"source_id":"1008.2750","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a72dc9453fec1c1a74997be0b47e7cb31d9e345a73cadb842ea0baabd2d91205","sha256:f4bc600fd0af54a2796f092d55f44f7c74f8a5b5bca72a6fd865c692b3179047"],"state_sha256":"5e70a8d67f11755b1cc1bcbdcaa36860386536dca175422f373c6b8e7798764e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MZQiMR9mioG5VHqs2leA1ClEKCR+v+mShKJAnaCc2BMhM0hVsIz/FIE13hoTyf3GISvMhRfOVS2l/eu3pinqAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:16:47.846199Z","bundle_sha256":"2181637c0502ca7f0ed4a385fefbb0b962ffb35d3617209b998e3514c7a2fe9f"}}