{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:4HBNUZQTH5QFWJDBBKGXWCUMYD","short_pith_number":"pith:4HBNUZQT","canonical_record":{"source":{"id":"2106.14671","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-06-28T12:51:10Z","cross_cats_sorted":[],"title_canon_sha256":"b400e19470e5ccd12344c4151e09e7d73680f3d0fc2c6f61cee5dabe5e960103","abstract_canon_sha256":"a896e91eaf76a5f73232b48753ae893ba83186a0c0e733c78fd4d40e8ae9510b"},"schema_version":"1.0"},"canonical_sha256":"e1c2da66133f605b24610a8d7b0a8cc0f41818deec77b6251f87ce429966634a","source":{"kind":"arxiv","id":"2106.14671","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.14671","created_at":"2026-07-05T03:40:39Z"},{"alias_kind":"arxiv_version","alias_value":"2106.14671v1","created_at":"2026-07-05T03:40:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.14671","created_at":"2026-07-05T03:40:39Z"},{"alias_kind":"pith_short_12","alias_value":"4HBNUZQTH5QF","created_at":"2026-07-05T03:40:39Z"},{"alias_kind":"pith_short_16","alias_value":"4HBNUZQTH5QFWJDB","created_at":"2026-07-05T03:40:39Z"},{"alias_kind":"pith_short_8","alias_value":"4HBNUZQT","created_at":"2026-07-05T03:40:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:4HBNUZQTH5QFWJDBBKGXWCUMYD","target":"record","payload":{"canonical_record":{"source":{"id":"2106.14671","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-06-28T12:51:10Z","cross_cats_sorted":[],"title_canon_sha256":"b400e19470e5ccd12344c4151e09e7d73680f3d0fc2c6f61cee5dabe5e960103","abstract_canon_sha256":"a896e91eaf76a5f73232b48753ae893ba83186a0c0e733c78fd4d40e8ae9510b"},"schema_version":"1.0"},"canonical_sha256":"e1c2da66133f605b24610a8d7b0a8cc0f41818deec77b6251f87ce429966634a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:40:39.139006Z","signature_b64":"+QFcg3YfL9L+96MP6pORR4Jni47nKeyWHHf5p8QXK5kgzTXRnCec7ib0Z4t/Ez9lPYIkXnfGjX3aYzcEgzp6Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e1c2da66133f605b24610a8d7b0a8cc0f41818deec77b6251f87ce429966634a","last_reissued_at":"2026-07-05T03:40:39.138598Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:40:39.138598Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2106.14671","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":"2026-07-05T03:40:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/e5C0pyI42G5p0Cn/9Owxa/0n7Ze4koQzy/2Bk9bqWBzRWrbnIwYlZKa9LdQuc63fwiGgHvfWmIQkI5hiYASAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:14:21.705905Z"},"content_sha256":"81d94e29b40f2e207ad30c80475746ce701892c1e92575cef9551e1e7eb2af6a","schema_version":"1.0","event_id":"sha256:81d94e29b40f2e207ad30c80475746ce701892c1e92575cef9551e1e7eb2af6a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:4HBNUZQTH5QFWJDBBKGXWCUMYD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"FRaC: FMCW-Based Joint Radar-Communications System via Index Modulation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Dingyou Ma, Nir Shlezinger, Tianyao Huang, Yimin Liu, Yonina C. Eldar","submitted_at":"2021-06-28T12:51:10Z","abstract_excerpt":"Dual function radar communications (DFRC) systems are attractive technologies for autonomous vehicles, which utilize electromagnetic waves to constantly sense the environment while simultaneously communicating with neighbouring devices. An emerging approach to implement DFRC systems is to embed information in radar waveforms via index modulation (IM). Implementation of DFRC schemes in vehicular systems gives rise to strict constraints in terms of cost, power efficiency, and hardware complexity. In this paper, we extend IM-based DFRC systems to utilize sparse arrays and frequency modulated cont"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.14671","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/2106.14671/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":"2026-07-05T03:40:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"33IjL0ZK/CXapbWJTsLvx+N4ZXw2rfUJ7oCGtjdn6+1oWx7W/L/SalwHZ3qmQeRBthICIUolqCdb/0Sq9nHhAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:14:21.706405Z"},"content_sha256":"da843c4b265ef9a258d0303e3839dae497cb6fea66625f488511ed7bb706b177","schema_version":"1.0","event_id":"sha256:da843c4b265ef9a258d0303e3839dae497cb6fea66625f488511ed7bb706b177"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4HBNUZQTH5QFWJDBBKGXWCUMYD/bundle.json","state_url":"https://pith.science/pith/4HBNUZQTH5QFWJDBBKGXWCUMYD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4HBNUZQTH5QFWJDBBKGXWCUMYD/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":"2026-08-07T06:14:21Z","links":{"resolver":"https://pith.science/pith/4HBNUZQTH5QFWJDBBKGXWCUMYD","bundle":"https://pith.science/pith/4HBNUZQTH5QFWJDBBKGXWCUMYD/bundle.json","state":"https://pith.science/pith/4HBNUZQTH5QFWJDBBKGXWCUMYD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4HBNUZQTH5QFWJDBBKGXWCUMYD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:4HBNUZQTH5QFWJDBBKGXWCUMYD","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":"a896e91eaf76a5f73232b48753ae893ba83186a0c0e733c78fd4d40e8ae9510b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-06-28T12:51:10Z","title_canon_sha256":"b400e19470e5ccd12344c4151e09e7d73680f3d0fc2c6f61cee5dabe5e960103"},"schema_version":"1.0","source":{"id":"2106.14671","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.14671","created_at":"2026-07-05T03:40:39Z"},{"alias_kind":"arxiv_version","alias_value":"2106.14671v1","created_at":"2026-07-05T03:40:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.14671","created_at":"2026-07-05T03:40:39Z"},{"alias_kind":"pith_short_12","alias_value":"4HBNUZQTH5QF","created_at":"2026-07-05T03:40:39Z"},{"alias_kind":"pith_short_16","alias_value":"4HBNUZQTH5QFWJDB","created_at":"2026-07-05T03:40:39Z"},{"alias_kind":"pith_short_8","alias_value":"4HBNUZQT","created_at":"2026-07-05T03:40:39Z"}],"graph_snapshots":[{"event_id":"sha256:da843c4b265ef9a258d0303e3839dae497cb6fea66625f488511ed7bb706b177","target":"graph","created_at":"2026-07-05T03:40:39Z","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/2106.14671/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Dual function radar communications (DFRC) systems are attractive technologies for autonomous vehicles, which utilize electromagnetic waves to constantly sense the environment while simultaneously communicating with neighbouring devices. An emerging approach to implement DFRC systems is to embed information in radar waveforms via index modulation (IM). Implementation of DFRC schemes in vehicular systems gives rise to strict constraints in terms of cost, power efficiency, and hardware complexity. In this paper, we extend IM-based DFRC systems to utilize sparse arrays and frequency modulated cont","authors_text":"Dingyou Ma, Nir Shlezinger, Tianyao Huang, Yimin Liu, Yonina C. Eldar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-06-28T12:51:10Z","title":"FRaC: FMCW-Based Joint Radar-Communications System via Index Modulation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.14671","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":"sha256:81d94e29b40f2e207ad30c80475746ce701892c1e92575cef9551e1e7eb2af6a","target":"record","created_at":"2026-07-05T03:40:39Z","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":"a896e91eaf76a5f73232b48753ae893ba83186a0c0e733c78fd4d40e8ae9510b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2021-06-28T12:51:10Z","title_canon_sha256":"b400e19470e5ccd12344c4151e09e7d73680f3d0fc2c6f61cee5dabe5e960103"},"schema_version":"1.0","source":{"id":"2106.14671","kind":"arxiv","version":1}},"canonical_sha256":"e1c2da66133f605b24610a8d7b0a8cc0f41818deec77b6251f87ce429966634a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e1c2da66133f605b24610a8d7b0a8cc0f41818deec77b6251f87ce429966634a","first_computed_at":"2026-07-05T03:40:39.138598Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:40:39.138598Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+QFcg3YfL9L+96MP6pORR4Jni47nKeyWHHf5p8QXK5kgzTXRnCec7ib0Z4t/Ez9lPYIkXnfGjX3aYzcEgzp6Aw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:40:39.139006Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.14671","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:81d94e29b40f2e207ad30c80475746ce701892c1e92575cef9551e1e7eb2af6a","sha256:da843c4b265ef9a258d0303e3839dae497cb6fea66625f488511ed7bb706b177"],"state_sha256":"f46ebdef47ffa7ea0a86e1c99aa35203557852912ae618c0efe054782f731cca"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XXL+xKqlgDqTtscXop/ioxAGHFta4CyExMSvwsEFAf6iwXAA9nZMZ9mUfv41nMNm2k5YYRUDE+uds4FrZwLyAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T06:14:21.711305Z","bundle_sha256":"990daf8e266fac71ae08c5e8265769bda8807c309b675892c26989298597d393"}}