{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:JO6RLHMZCPIFTHGKG7RUXVGN3P","short_pith_number":"pith:JO6RLHMZ","canonical_record":{"source":{"id":"1707.00324","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-07-02T17:22:41Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"a7a0ae8252249178c19d15e0965228a1d46b660a9a2825bd7e3a281effc51fbc","abstract_canon_sha256":"2b4fb3b9c4bd2c0b4d84633ccbc0e10d12dc29f2463d831b61395eb5d1c122be"},"schema_version":"1.0"},"canonical_sha256":"4bbd159d9913d0599cca37e34bd4cddbe3a64afce040ff36eaffb30fd87fc5e2","source":{"kind":"arxiv","id":"1707.00324","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.00324","created_at":"2026-05-18T00:39:56Z"},{"alias_kind":"arxiv_version","alias_value":"1707.00324v2","created_at":"2026-05-18T00:39:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.00324","created_at":"2026-05-18T00:39:56Z"},{"alias_kind":"pith_short_12","alias_value":"JO6RLHMZCPIF","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"JO6RLHMZCPIFTHGK","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"JO6RLHMZ","created_at":"2026-05-18T12:31:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:JO6RLHMZCPIFTHGKG7RUXVGN3P","target":"record","payload":{"canonical_record":{"source":{"id":"1707.00324","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-07-02T17:22:41Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"a7a0ae8252249178c19d15e0965228a1d46b660a9a2825bd7e3a281effc51fbc","abstract_canon_sha256":"2b4fb3b9c4bd2c0b4d84633ccbc0e10d12dc29f2463d831b61395eb5d1c122be"},"schema_version":"1.0"},"canonical_sha256":"4bbd159d9913d0599cca37e34bd4cddbe3a64afce040ff36eaffb30fd87fc5e2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:56.415537Z","signature_b64":"xqW0Kuo9NfQ7TrkgYGYZtbhHSuTH41MOBf1kNNDxvCuHOmNMMgFgYiI0rNmsx7pPzW6KQlpB1TOaCyrAK7ycDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4bbd159d9913d0599cca37e34bd4cddbe3a64afce040ff36eaffb30fd87fc5e2","last_reissued_at":"2026-05-18T00:39:56.415095Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:56.415095Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.00324","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":"2026-05-18T00:39:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"crK6kSEDHbrCHBa+rJRddxrJ3q+nRm1ZPB4Z38nnGuBgLsKHaWYCEDKfjvtoq0lRQCf/Pg12DCYVZJ9nnNr6Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:37:59.204563Z"},"content_sha256":"06b58883290ff1dd44fc73c617d1ed7a71fddf2e46351e8bfac16dca4efd66e7","schema_version":"1.0","event_id":"sha256:06b58883290ff1dd44fc73c617d1ed7a71fddf2e46351e8bfac16dca4efd66e7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:JO6RLHMZCPIFTHGKG7RUXVGN3P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Efficient Spectrum Availability Information Recovery for Wideband DSA Networks: A Weighted Compressive Sampling Approach","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Bassem Khalfi, Bechir Hamdaoui, Mohsen Guizani, Nizar Zorba","submitted_at":"2017-07-02T17:22:41Z","abstract_excerpt":"Compressive sampling has great potential for making wideband spectrum sensing possible at sub-Nyquist sampling rates. As a result, there have recently been research efforts that leverage compressive sampling to enable efficient wideband spectrum sensing. These efforts consider homogenous wideband spectrum, where all bands are assumed to have similar PU traffic characteristics. In practice, however, wideband spectrum is not homogeneous, in that different spectrum bands could present different PU occupancy patterns. In fact, the nature of spectrum assignment, in which applications of similar typ"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.00324","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":"2026-05-18T00:39:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wlD9fdAJDYKS/Eho4yCNwYZuCFVG8+IdJYFjjnkSJ5eayEbtipS3qV0qKcgb1O+XJzffwiwSOSMpzb6vy26vCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:37:59.205279Z"},"content_sha256":"68620907cdecf7aa41a943ff3ea28dad157017f83bd7cb176a327f543168cc1e","schema_version":"1.0","event_id":"sha256:68620907cdecf7aa41a943ff3ea28dad157017f83bd7cb176a327f543168cc1e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JO6RLHMZCPIFTHGKG7RUXVGN3P/bundle.json","state_url":"https://pith.science/pith/JO6RLHMZCPIFTHGKG7RUXVGN3P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JO6RLHMZCPIFTHGKG7RUXVGN3P/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":"2026-05-26T19:37:59Z","links":{"resolver":"https://pith.science/pith/JO6RLHMZCPIFTHGKG7RUXVGN3P","bundle":"https://pith.science/pith/JO6RLHMZCPIFTHGKG7RUXVGN3P/bundle.json","state":"https://pith.science/pith/JO6RLHMZCPIFTHGKG7RUXVGN3P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JO6RLHMZCPIFTHGKG7RUXVGN3P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:JO6RLHMZCPIFTHGKG7RUXVGN3P","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":"2b4fb3b9c4bd2c0b4d84633ccbc0e10d12dc29f2463d831b61395eb5d1c122be","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-07-02T17:22:41Z","title_canon_sha256":"a7a0ae8252249178c19d15e0965228a1d46b660a9a2825bd7e3a281effc51fbc"},"schema_version":"1.0","source":{"id":"1707.00324","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.00324","created_at":"2026-05-18T00:39:56Z"},{"alias_kind":"arxiv_version","alias_value":"1707.00324v2","created_at":"2026-05-18T00:39:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.00324","created_at":"2026-05-18T00:39:56Z"},{"alias_kind":"pith_short_12","alias_value":"JO6RLHMZCPIF","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"JO6RLHMZCPIFTHGK","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"JO6RLHMZ","created_at":"2026-05-18T12:31:24Z"}],"graph_snapshots":[{"event_id":"sha256:68620907cdecf7aa41a943ff3ea28dad157017f83bd7cb176a327f543168cc1e","target":"graph","created_at":"2026-05-18T00:39:56Z","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":"Compressive sampling has great potential for making wideband spectrum sensing possible at sub-Nyquist sampling rates. As a result, there have recently been research efforts that leverage compressive sampling to enable efficient wideband spectrum sensing. These efforts consider homogenous wideband spectrum, where all bands are assumed to have similar PU traffic characteristics. In practice, however, wideband spectrum is not homogeneous, in that different spectrum bands could present different PU occupancy patterns. In fact, the nature of spectrum assignment, in which applications of similar typ","authors_text":"Bassem Khalfi, Bechir Hamdaoui, Mohsen Guizani, Nizar Zorba","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-07-02T17:22:41Z","title":"Efficient Spectrum Availability Information Recovery for Wideband DSA Networks: A Weighted Compressive Sampling Approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.00324","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":"sha256:06b58883290ff1dd44fc73c617d1ed7a71fddf2e46351e8bfac16dca4efd66e7","target":"record","created_at":"2026-05-18T00:39:56Z","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":"2b4fb3b9c4bd2c0b4d84633ccbc0e10d12dc29f2463d831b61395eb5d1c122be","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-07-02T17:22:41Z","title_canon_sha256":"a7a0ae8252249178c19d15e0965228a1d46b660a9a2825bd7e3a281effc51fbc"},"schema_version":"1.0","source":{"id":"1707.00324","kind":"arxiv","version":2}},"canonical_sha256":"4bbd159d9913d0599cca37e34bd4cddbe3a64afce040ff36eaffb30fd87fc5e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4bbd159d9913d0599cca37e34bd4cddbe3a64afce040ff36eaffb30fd87fc5e2","first_computed_at":"2026-05-18T00:39:56.415095Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:39:56.415095Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xqW0Kuo9NfQ7TrkgYGYZtbhHSuTH41MOBf1kNNDxvCuHOmNMMgFgYiI0rNmsx7pPzW6KQlpB1TOaCyrAK7ycDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:39:56.415537Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.00324","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:06b58883290ff1dd44fc73c617d1ed7a71fddf2e46351e8bfac16dca4efd66e7","sha256:68620907cdecf7aa41a943ff3ea28dad157017f83bd7cb176a327f543168cc1e"],"state_sha256":"3e148e711b59f4520a77e6d8c8f967d3dfbf71d1e9bd9ffa65e3865e6e366548"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m1RNJLrQvhlwda47jAN8PEWvxYP/TLLkeW4WHoGCirG+ChWY2MQ1Xk8A7DCaZF2Api7eIM+O4EniRjWOACx3CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T19:37:59.209188Z","bundle_sha256":"438c4e94cb794a3adb1f005ae034337b1ddba364018de549a88eff81b7a56268"}}