{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:VHEH6BOVIIBMIA2C5SUHKCNHPN","short_pith_number":"pith:VHEH6BOV","canonical_record":{"source":{"id":"1711.09214","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-11-25T08:08:29Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"40b2af8e66483f94f86433b24f6a788a1bf849f6ddc238f0496a4565aa71665b","abstract_canon_sha256":"4c76453b542dd77e8d037924dda7e0bbf778b27eac3818a97c9e435c97c227cd"},"schema_version":"1.0"},"canonical_sha256":"a9c87f05d54202c40342eca87509a77b7c61bf5222e8e2d58fc9134437600ec9","source":{"kind":"arxiv","id":"1711.09214","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.09214","created_at":"2026-05-17T23:44:59Z"},{"alias_kind":"arxiv_version","alias_value":"1711.09214v1","created_at":"2026-05-17T23:44:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.09214","created_at":"2026-05-17T23:44:59Z"},{"alias_kind":"pith_short_12","alias_value":"VHEH6BOVIIBM","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VHEH6BOVIIBMIA2C","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VHEH6BOV","created_at":"2026-05-18T12:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:VHEH6BOVIIBMIA2C5SUHKCNHPN","target":"record","payload":{"canonical_record":{"source":{"id":"1711.09214","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-11-25T08:08:29Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"40b2af8e66483f94f86433b24f6a788a1bf849f6ddc238f0496a4565aa71665b","abstract_canon_sha256":"4c76453b542dd77e8d037924dda7e0bbf778b27eac3818a97c9e435c97c227cd"},"schema_version":"1.0"},"canonical_sha256":"a9c87f05d54202c40342eca87509a77b7c61bf5222e8e2d58fc9134437600ec9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:59.954441Z","signature_b64":"aZy7UfIB7BPd863Mfw7zB7CWZy/ohedyd5QYiVtLIBCqh95tp07vC6oRlDWQ+shVJMYPFr5o3jkA8l7KPuw4AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a9c87f05d54202c40342eca87509a77b7c61bf5222e8e2d58fc9134437600ec9","last_reissued_at":"2026-05-17T23:44:59.953927Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:59.953927Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.09214","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":"2026-05-17T23:44:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gys8rk3pEKspfaXPwtLwkISaIB91EjEXIwEFh336FIAT1n6ZLX/tsdl4Ryd1pXGb+Z/YKhnTPILxRQ+MkuDCBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:03:49.421808Z"},"content_sha256":"18ae41663c42e7d0d88962b3a333e4cd47b11c77bed0b67628ff280577f4b387","schema_version":"1.0","event_id":"sha256:18ae41663c42e7d0d88962b3a333e4cd47b11c77bed0b67628ff280577f4b387"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:VHEH6BOVIIBMIA2C5SUHKCNHPN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Outage Analysis of Ambient Backscatter Communication Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Chintha Tellambura, Gongpu Wang, Saman Atapattu, Wenjing Zhao","submitted_at":"2017-11-25T08:08:29Z","abstract_excerpt":"This paper addresses the problem of outage characterization of an ambient backscatter communication system with a pair of passive tag and reader. In particular, an exact expression for the effective channel distribution is derived. Then, the outage probability at the reader is analyzed rigorously. Since the expression contains an infinite sum, a tight truncation error bound has been derived to facilitate precise numerical evaluations. Furthermore, an asymptotic expression is provided for high signal-to-noise ratio (SNR) regime."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.09214","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":"2026-05-17T23:44:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t+pIYSqatBHGVqQHMccr4pi3x39O+W4Os9Zoae1/MrXw2ewmeeGMt5IztypFtOwVeMDIhH5GiR+fMu6+Ttw9DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:03:49.422152Z"},"content_sha256":"1087c13f0fc34698ca564cedcd044f2b846b79296fe5e5db06a77390735b079e","schema_version":"1.0","event_id":"sha256:1087c13f0fc34698ca564cedcd044f2b846b79296fe5e5db06a77390735b079e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VHEH6BOVIIBMIA2C5SUHKCNHPN/bundle.json","state_url":"https://pith.science/pith/VHEH6BOVIIBMIA2C5SUHKCNHPN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VHEH6BOVIIBMIA2C5SUHKCNHPN/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":"2026-05-28T15:03:49Z","links":{"resolver":"https://pith.science/pith/VHEH6BOVIIBMIA2C5SUHKCNHPN","bundle":"https://pith.science/pith/VHEH6BOVIIBMIA2C5SUHKCNHPN/bundle.json","state":"https://pith.science/pith/VHEH6BOVIIBMIA2C5SUHKCNHPN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VHEH6BOVIIBMIA2C5SUHKCNHPN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:VHEH6BOVIIBMIA2C5SUHKCNHPN","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":"4c76453b542dd77e8d037924dda7e0bbf778b27eac3818a97c9e435c97c227cd","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-11-25T08:08:29Z","title_canon_sha256":"40b2af8e66483f94f86433b24f6a788a1bf849f6ddc238f0496a4565aa71665b"},"schema_version":"1.0","source":{"id":"1711.09214","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.09214","created_at":"2026-05-17T23:44:59Z"},{"alias_kind":"arxiv_version","alias_value":"1711.09214v1","created_at":"2026-05-17T23:44:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.09214","created_at":"2026-05-17T23:44:59Z"},{"alias_kind":"pith_short_12","alias_value":"VHEH6BOVIIBM","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VHEH6BOVIIBMIA2C","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VHEH6BOV","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:1087c13f0fc34698ca564cedcd044f2b846b79296fe5e5db06a77390735b079e","target":"graph","created_at":"2026-05-17T23:44:59Z","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 addresses the problem of outage characterization of an ambient backscatter communication system with a pair of passive tag and reader. In particular, an exact expression for the effective channel distribution is derived. Then, the outage probability at the reader is analyzed rigorously. Since the expression contains an infinite sum, a tight truncation error bound has been derived to facilitate precise numerical evaluations. Furthermore, an asymptotic expression is provided for high signal-to-noise ratio (SNR) regime.","authors_text":"Chintha Tellambura, Gongpu Wang, Saman Atapattu, Wenjing Zhao","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-11-25T08:08:29Z","title":"Outage Analysis of Ambient Backscatter Communication Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.09214","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":"sha256:18ae41663c42e7d0d88962b3a333e4cd47b11c77bed0b67628ff280577f4b387","target":"record","created_at":"2026-05-17T23:44:59Z","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":"4c76453b542dd77e8d037924dda7e0bbf778b27eac3818a97c9e435c97c227cd","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-11-25T08:08:29Z","title_canon_sha256":"40b2af8e66483f94f86433b24f6a788a1bf849f6ddc238f0496a4565aa71665b"},"schema_version":"1.0","source":{"id":"1711.09214","kind":"arxiv","version":1}},"canonical_sha256":"a9c87f05d54202c40342eca87509a77b7c61bf5222e8e2d58fc9134437600ec9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a9c87f05d54202c40342eca87509a77b7c61bf5222e8e2d58fc9134437600ec9","first_computed_at":"2026-05-17T23:44:59.953927Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:59.953927Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aZy7UfIB7BPd863Mfw7zB7CWZy/ohedyd5QYiVtLIBCqh95tp07vC6oRlDWQ+shVJMYPFr5o3jkA8l7KPuw4AQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:59.954441Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.09214","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:18ae41663c42e7d0d88962b3a333e4cd47b11c77bed0b67628ff280577f4b387","sha256:1087c13f0fc34698ca564cedcd044f2b846b79296fe5e5db06a77390735b079e"],"state_sha256":"cb6c6a8ba309e11a5580db065a1376d6757d63c77c3e5cfbde9ed51ed6323c32"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WDYAnOYhAw6sHnylN8S7XLnW35S6vxByM5OnsM4VanlpIQuDoZ2euhPEWt64N6rNfAJ5P1TiHQ8xBv+lI8toBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T15:03:49.424150Z","bundle_sha256":"19776085cb8ea70dc409bc973c84ae61d7be73eb479592b784704be5b10a0644"}}