{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:PX7XEJSA6PTJULAE4KX2HSIETL","short_pith_number":"pith:PX7XEJSA","canonical_record":{"source":{"id":"1712.09435","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-12-26T21:56:55Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"1f8e290ccc625718373a231467f89d122be8ec18547f3c47f8e22794dedda981","abstract_canon_sha256":"9d5436f374e9eac68ee6cbe38f97b32d34cd1b302928b8ab806550b7dfa3157b"},"schema_version":"1.0"},"canonical_sha256":"7dff722640f3e69a2c04e2afa3c9049aed6d8d9e7f5e4561054a37c985dbeac5","source":{"kind":"arxiv","id":"1712.09435","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.09435","created_at":"2026-05-18T00:27:08Z"},{"alias_kind":"arxiv_version","alias_value":"1712.09435v1","created_at":"2026-05-18T00:27:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.09435","created_at":"2026-05-18T00:27:08Z"},{"alias_kind":"pith_short_12","alias_value":"PX7XEJSA6PTJ","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PX7XEJSA6PTJULAE","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PX7XEJSA","created_at":"2026-05-18T12:31:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:PX7XEJSA6PTJULAE4KX2HSIETL","target":"record","payload":{"canonical_record":{"source":{"id":"1712.09435","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-12-26T21:56:55Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"1f8e290ccc625718373a231467f89d122be8ec18547f3c47f8e22794dedda981","abstract_canon_sha256":"9d5436f374e9eac68ee6cbe38f97b32d34cd1b302928b8ab806550b7dfa3157b"},"schema_version":"1.0"},"canonical_sha256":"7dff722640f3e69a2c04e2afa3c9049aed6d8d9e7f5e4561054a37c985dbeac5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:08.438799Z","signature_b64":"hWW43UhOplVdKwFLO2721JLtlctKZkr4zM5iDZggpzzNHp60kW6CWBe7o+qt9LCxG2llYoKi4MnH2+thlpftBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7dff722640f3e69a2c04e2afa3c9049aed6d8d9e7f5e4561054a37c985dbeac5","last_reissued_at":"2026-05-18T00:27:08.438164Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:08.438164Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.09435","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":"2026-05-18T00:27:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HZl8totGE5clBaAeF++yI3p0SQev9WlH/FjGo79GhhNZAYDAuiNA5NKCLdFKdAiyso3Fequbfh1IgjhJWxhpBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:57:17.024811Z"},"content_sha256":"2cd8e57c046b6ed6acc5a44ced7ab59f59890d8a81e35dea10a5c5e3c50a9512","schema_version":"1.0","event_id":"sha256:2cd8e57c046b6ed6acc5a44ced7ab59f59890d8a81e35dea10a5c5e3c50a9512"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:PX7XEJSA6PTJULAE4KX2HSIETL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the Frequency Dependency of Radio Channel's Delay Spread: Analyses and Findings From mmMAGIC Multi-frequency Channel Sounding","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Aki Karttunen, Aliou Bamba, Cheikh Diakhate, Jean-Marc Conrat, Jonas Medbo, Katsuyuki Haneda, Michael Peter, Naveed Iqbal, Raffaele D'Errico, Sinh L. H. Nguyen","submitted_at":"2017-12-26T21:56:55Z","abstract_excerpt":"This paper analyzes the frequency dependency of the radio propagation channel's root mean square (rms) delay spread (DS), based on the multi-frequency measurement campaigns in the mmMAGIC project. The campaigns cover indoor, outdoor, and outdoor-to-indoor (O2I) scenarios and a wide frequency range from 2 to 86 GHz. Several requirements have been identified that define the parameters which need to be aligned in order to make a reasonable comparison among the different channel sounders employed for this study. A new modelling approach enabling the evaluation of the statistical significance of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.09435","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":""},"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":"2026-05-18T00:27:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NE1lJp0sBsmUbPbRhtxIXL4mZkztMzFqCpfHZjFHQllHBnXq3Apsb/mJmuiaGYJJQzLZz2cfSjUTPlHU/0ARDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:57:17.025184Z"},"content_sha256":"cf2945b49be509e4ada407263b1bf067a14f5ebcc26804ae1a26d776aaddfe9f","schema_version":"1.0","event_id":"sha256:cf2945b49be509e4ada407263b1bf067a14f5ebcc26804ae1a26d776aaddfe9f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PX7XEJSA6PTJULAE4KX2HSIETL/bundle.json","state_url":"https://pith.science/pith/PX7XEJSA6PTJULAE4KX2HSIETL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PX7XEJSA6PTJULAE4KX2HSIETL/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":"2026-06-02T21:57:17Z","links":{"resolver":"https://pith.science/pith/PX7XEJSA6PTJULAE4KX2HSIETL","bundle":"https://pith.science/pith/PX7XEJSA6PTJULAE4KX2HSIETL/bundle.json","state":"https://pith.science/pith/PX7XEJSA6PTJULAE4KX2HSIETL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PX7XEJSA6PTJULAE4KX2HSIETL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:PX7XEJSA6PTJULAE4KX2HSIETL","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":"9d5436f374e9eac68ee6cbe38f97b32d34cd1b302928b8ab806550b7dfa3157b","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-12-26T21:56:55Z","title_canon_sha256":"1f8e290ccc625718373a231467f89d122be8ec18547f3c47f8e22794dedda981"},"schema_version":"1.0","source":{"id":"1712.09435","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.09435","created_at":"2026-05-18T00:27:08Z"},{"alias_kind":"arxiv_version","alias_value":"1712.09435v1","created_at":"2026-05-18T00:27:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.09435","created_at":"2026-05-18T00:27:08Z"},{"alias_kind":"pith_short_12","alias_value":"PX7XEJSA6PTJ","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PX7XEJSA6PTJULAE","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PX7XEJSA","created_at":"2026-05-18T12:31:37Z"}],"graph_snapshots":[{"event_id":"sha256:cf2945b49be509e4ada407263b1bf067a14f5ebcc26804ae1a26d776aaddfe9f","target":"graph","created_at":"2026-05-18T00:27:08Z","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":"This paper analyzes the frequency dependency of the radio propagation channel's root mean square (rms) delay spread (DS), based on the multi-frequency measurement campaigns in the mmMAGIC project. The campaigns cover indoor, outdoor, and outdoor-to-indoor (O2I) scenarios and a wide frequency range from 2 to 86 GHz. Several requirements have been identified that define the parameters which need to be aligned in order to make a reasonable comparison among the different channel sounders employed for this study. A new modelling approach enabling the evaluation of the statistical significance of th","authors_text":"Aki Karttunen, Aliou Bamba, Cheikh Diakhate, Jean-Marc Conrat, Jonas Medbo, Katsuyuki Haneda, Michael Peter, Naveed Iqbal, Raffaele D'Errico, Sinh L. H. Nguyen","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-12-26T21:56:55Z","title":"On the Frequency Dependency of Radio Channel's Delay Spread: Analyses and Findings From mmMAGIC Multi-frequency Channel Sounding"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.09435","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":"sha256:2cd8e57c046b6ed6acc5a44ced7ab59f59890d8a81e35dea10a5c5e3c50a9512","target":"record","created_at":"2026-05-18T00:27:08Z","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":"9d5436f374e9eac68ee6cbe38f97b32d34cd1b302928b8ab806550b7dfa3157b","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-12-26T21:56:55Z","title_canon_sha256":"1f8e290ccc625718373a231467f89d122be8ec18547f3c47f8e22794dedda981"},"schema_version":"1.0","source":{"id":"1712.09435","kind":"arxiv","version":1}},"canonical_sha256":"7dff722640f3e69a2c04e2afa3c9049aed6d8d9e7f5e4561054a37c985dbeac5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7dff722640f3e69a2c04e2afa3c9049aed6d8d9e7f5e4561054a37c985dbeac5","first_computed_at":"2026-05-18T00:27:08.438164Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:08.438164Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hWW43UhOplVdKwFLO2721JLtlctKZkr4zM5iDZggpzzNHp60kW6CWBe7o+qt9LCxG2llYoKi4MnH2+thlpftBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:08.438799Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.09435","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2cd8e57c046b6ed6acc5a44ced7ab59f59890d8a81e35dea10a5c5e3c50a9512","sha256:cf2945b49be509e4ada407263b1bf067a14f5ebcc26804ae1a26d776aaddfe9f"],"state_sha256":"8463f72edaf0b5f62242ffb2e0438faf7d9e534767777be33b7423c4099000b0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aOm0E0VSXz47WxbER28NvdZmAyx41DHvfDTyai5wdaz30XXXCusAk3UcfiYJnaL7n47GwtrMb2+mngJJCDDbCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T21:57:17.027247Z","bundle_sha256":"f9101765c45e17e9699f5b40192ac14d1faaacfd8014438f7cd0b9b6a7350836"}}