{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:5RJZYO4DEC3ERXS4XFAA5OELIM","short_pith_number":"pith:5RJZYO4D","canonical_record":{"source":{"id":"2606.17737","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-06-16T09:56:11Z","cross_cats_sorted":[],"title_canon_sha256":"47ab6a0ba50d4f521130726aba7ede092c18b1d5bccf1e84e5f80d28457cdb83","abstract_canon_sha256":"3d6fb5efafc262cef1b3ea4ff9b31d22ff563c3e53724fcafff7497f67580aea"},"schema_version":"1.0"},"canonical_sha256":"ec539c3b8320b648de5cb9400eb88b43024f3b85ea33b39f985413e46bffba1f","source":{"kind":"arxiv","id":"2606.17737","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.17737","created_at":"2026-06-19T16:10:20Z"},{"alias_kind":"arxiv_version","alias_value":"2606.17737v1","created_at":"2026-06-19T16:10:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.17737","created_at":"2026-06-19T16:10:20Z"},{"alias_kind":"pith_short_12","alias_value":"5RJZYO4DEC3E","created_at":"2026-06-19T16:10:20Z"},{"alias_kind":"pith_short_16","alias_value":"5RJZYO4DEC3ERXS4","created_at":"2026-06-19T16:10:20Z"},{"alias_kind":"pith_short_8","alias_value":"5RJZYO4D","created_at":"2026-06-19T16:10:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:5RJZYO4DEC3ERXS4XFAA5OELIM","target":"record","payload":{"canonical_record":{"source":{"id":"2606.17737","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-06-16T09:56:11Z","cross_cats_sorted":[],"title_canon_sha256":"47ab6a0ba50d4f521130726aba7ede092c18b1d5bccf1e84e5f80d28457cdb83","abstract_canon_sha256":"3d6fb5efafc262cef1b3ea4ff9b31d22ff563c3e53724fcafff7497f67580aea"},"schema_version":"1.0"},"canonical_sha256":"ec539c3b8320b648de5cb9400eb88b43024f3b85ea33b39f985413e46bffba1f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-19T16:10:20.695264Z","signature_b64":"4NCgKCcSUAejnsOMa1OrX/WLuRT2qzinP5EzAqEWGBkSfyIe62PKCIGtKOzUsOIOtB46VoQ6fh++1WaNxobQAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ec539c3b8320b648de5cb9400eb88b43024f3b85ea33b39f985413e46bffba1f","last_reissued_at":"2026-06-19T16:10:20.694937Z","signature_status":"signed_v1","first_computed_at":"2026-06-19T16:10:20.694937Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.17737","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":"2026-06-19T16:10:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gucyCEDygVhkxn9cb8+rcGuKg7o9quGMDVK0KfVE3TwJP7Y2kqVXqmCzHN7E3InTo379hsYEGlb8B+aF3XRdBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T16:57:27.100340Z"},"content_sha256":"9fc0cbaac0e854849703fe0974b38f45c583b479366488c5913e4e43f237093a","schema_version":"1.0","event_id":"sha256:9fc0cbaac0e854849703fe0974b38f45c583b479366488c5913e4e43f237093a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:5RJZYO4DEC3ERXS4XFAA5OELIM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deep CSI Feedback for FDD Massive MIMO Systems: A Curvelet Learning Approach","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Huiqiang Xie, Jiancun Fan, Kai Xie, Mengli Tao","submitted_at":"2026-06-16T09:56:11Z","abstract_excerpt":"Downlink channel state information (CSI) feedback plays a key role in frequency division duplex (FDD) massive multiple-input multiple-output (mMIMO) systems. The growth of antennas in ultra-massive MIMO increases the difficulty and overhead of CSI feedback, which poses significant challenges for conventional downlink CSI feedback mechanisms. To address the limitations of existing CSI feedback approaches, this paper proposes a novel curvelet learning based framework termed SwinCANet, comprising a frequency-domain information processing module and a denoising module. The frequency-domain informa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.17737","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/2606.17737/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":"2026-06-19T16:10:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FpysE++Lp1sO9E02gPlmc4YdLZnzbWxtNstl8CGpIvqJY2K8HCtNGuYotM0gzATwTic0AGRM6CXyIH9gkwEcCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T16:57:27.100719Z"},"content_sha256":"9666f7d01e945bb8cc94fe73f882564d897f1784a8902e835fe04a1cb1a53c98","schema_version":"1.0","event_id":"sha256:9666f7d01e945bb8cc94fe73f882564d897f1784a8902e835fe04a1cb1a53c98"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5RJZYO4DEC3ERXS4XFAA5OELIM/bundle.json","state_url":"https://pith.science/pith/5RJZYO4DEC3ERXS4XFAA5OELIM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5RJZYO4DEC3ERXS4XFAA5OELIM/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":"2026-06-26T16:57:27Z","links":{"resolver":"https://pith.science/pith/5RJZYO4DEC3ERXS4XFAA5OELIM","bundle":"https://pith.science/pith/5RJZYO4DEC3ERXS4XFAA5OELIM/bundle.json","state":"https://pith.science/pith/5RJZYO4DEC3ERXS4XFAA5OELIM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5RJZYO4DEC3ERXS4XFAA5OELIM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:5RJZYO4DEC3ERXS4XFAA5OELIM","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":"3d6fb5efafc262cef1b3ea4ff9b31d22ff563c3e53724fcafff7497f67580aea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-06-16T09:56:11Z","title_canon_sha256":"47ab6a0ba50d4f521130726aba7ede092c18b1d5bccf1e84e5f80d28457cdb83"},"schema_version":"1.0","source":{"id":"2606.17737","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.17737","created_at":"2026-06-19T16:10:20Z"},{"alias_kind":"arxiv_version","alias_value":"2606.17737v1","created_at":"2026-06-19T16:10:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.17737","created_at":"2026-06-19T16:10:20Z"},{"alias_kind":"pith_short_12","alias_value":"5RJZYO4DEC3E","created_at":"2026-06-19T16:10:20Z"},{"alias_kind":"pith_short_16","alias_value":"5RJZYO4DEC3ERXS4","created_at":"2026-06-19T16:10:20Z"},{"alias_kind":"pith_short_8","alias_value":"5RJZYO4D","created_at":"2026-06-19T16:10:20Z"}],"graph_snapshots":[{"event_id":"sha256:9666f7d01e945bb8cc94fe73f882564d897f1784a8902e835fe04a1cb1a53c98","target":"graph","created_at":"2026-06-19T16:10:20Z","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/2606.17737/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Downlink channel state information (CSI) feedback plays a key role in frequency division duplex (FDD) massive multiple-input multiple-output (mMIMO) systems. The growth of antennas in ultra-massive MIMO increases the difficulty and overhead of CSI feedback, which poses significant challenges for conventional downlink CSI feedback mechanisms. To address the limitations of existing CSI feedback approaches, this paper proposes a novel curvelet learning based framework termed SwinCANet, comprising a frequency-domain information processing module and a denoising module. The frequency-domain informa","authors_text":"Huiqiang Xie, Jiancun Fan, Kai Xie, Mengli Tao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-06-16T09:56:11Z","title":"Deep CSI Feedback for FDD Massive MIMO Systems: A Curvelet Learning Approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.17737","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":"sha256:9fc0cbaac0e854849703fe0974b38f45c583b479366488c5913e4e43f237093a","target":"record","created_at":"2026-06-19T16:10:20Z","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":"3d6fb5efafc262cef1b3ea4ff9b31d22ff563c3e53724fcafff7497f67580aea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-06-16T09:56:11Z","title_canon_sha256":"47ab6a0ba50d4f521130726aba7ede092c18b1d5bccf1e84e5f80d28457cdb83"},"schema_version":"1.0","source":{"id":"2606.17737","kind":"arxiv","version":1}},"canonical_sha256":"ec539c3b8320b648de5cb9400eb88b43024f3b85ea33b39f985413e46bffba1f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ec539c3b8320b648de5cb9400eb88b43024f3b85ea33b39f985413e46bffba1f","first_computed_at":"2026-06-19T16:10:20.694937Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-19T16:10:20.694937Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4NCgKCcSUAejnsOMa1OrX/WLuRT2qzinP5EzAqEWGBkSfyIe62PKCIGtKOzUsOIOtB46VoQ6fh++1WaNxobQAQ==","signature_status":"signed_v1","signed_at":"2026-06-19T16:10:20.695264Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.17737","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9fc0cbaac0e854849703fe0974b38f45c583b479366488c5913e4e43f237093a","sha256:9666f7d01e945bb8cc94fe73f882564d897f1784a8902e835fe04a1cb1a53c98"],"state_sha256":"ab00bb598eb25ce5de08b23ca489b7aa823daa6d5c0ccb8bf12a337c3e5535bb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ep3/5U0OLMHjhsTrAKNjRNAnY+ERCUbSBkDejzkKPwZw5Cscmkmw4Z6AOTDzQYdFUBSbTHPDOLz0vqg0j4NACA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T16:57:27.102738Z","bundle_sha256":"eeee1ed68f2ef8e1bc3b6d324e151f5e47a1e129cee2331bacc35ed28b57fc82"}}