{
  "artifact": "covcollab_eve_detection",
  "schema_version": "1.0",
  "title": "Covert-Collaboration Eve-Detection Dataset (controlled factorial)",
  "created_utc": "2026-08-11T02:24:07Z",
  "reproducibility": "bit-identical within the pinned environment below (float reductions are BLAS-dependent, so cross-machine bit-identity is NOT claimed); run `--verify` to regenerate from the seed and assert the per-split Y SHA-256 matches",
  "environment": {
    "git_sha": "239fac6f654aaa817384556930c2776b08e3e43b",
    "numpy": "2.5.1",
    "torch": "2.13.0",
    "python": "3.14.2",
    "platform": "macOS-26.3-arm64-arm-64bit-Mach-O"
  },
  "generation": {
    "base_seed": 7000,
    "per_group": 16,
    "n_groups_core": 10,
    "n_groups_ood": 3,
    "sim_device": "cpu",
    "sim_dtype": "torch.complex128",
    "n_cells": 864,
    "n_optimized_policies_solved": 54,
    "optimized_psgd": {
      "surrogate": "sphericity",
      "steps": 40,
      "batch": 96,
      "n_eval": 256,
      "gamma_bob_sinr_floor_db": 0.0,
      "design_eve_snr_db": -10.0,
      "design_delta_db": -12.0,
      "design_bob_snr_db": 2.0
    },
    "wall_s": 76.49
  },
  "grid": {
    "formats": [
      "sc",
      "ofdm",
      "dfts_ofdm",
      "otfs",
      "afdm",
      "ofdm_comb"
    ],
    "arms": {
      "none": "no collaborative matrix (diagonal identity assignment, no cross-user mixing)",
      "random": "random feasible collaboration matrix W (fresh per group)",
      "optimized": "PSGD sphericity-covert W (designed once per cell at the reference point)"
    },
    "power_note": "all arms share ||W||_F^2 = P_W = M, so arms differ in structure not received energy",
    "M": {
      "multicarrier": [
        8,
        16,
        25
      ],
      "single_carrier": [
        8,
        12,
        16
      ],
      "note": "SC ZC pilots cap orthogonal M at 16; both grids are length-3 so per-format counts are equal"
    },
    "Kd_grid_K_d": [
      [
        2,
        1
      ],
      [
        2,
        2
      ],
      [
        4,
        1
      ],
      [
        2,
        4
      ]
    ],
    "channels_core": [
      {
        "family": "flat",
        "n_taps": 1,
        "eps": 0.0,
        "nu_max": 0.0
      },
      {
        "family": "multipath",
        "n_taps": 4,
        "eps": 0.0,
        "nu_max": 0.0
      },
      {
        "family": "doppler",
        "n_taps": 4,
        "eps": 0.1,
        "nu_max": 0.0015625
      }
    ],
    "channels_ood": [
      {
        "family": "doppler",
        "n_taps": 4,
        "eps": 0.25,
        "nu_max": 0.00390625
      }
    ],
    "n_rx_eve": 4,
    "eve_snr_db_grid": [
      -16.0,
      -12.0,
      -8.0,
      -4.0
    ],
    "delta_db_grid": [
      -20.0,
      -12.0,
      0.0,
      6.0
    ],
    "T_samples": 320
  },
  "splits": {
    "policy": "group-level: core cells split 80/10/10 of groups into train/val/test_iid so a split's policy realizations are disjoint; strong-Doppler cells -> test_ood (a distribution shift held out of the training channel distribution)",
    "counts": {
      "test_iid": 10368,
      "test_ood": 10368,
      "train": 82944,
      "val": 10368
    },
    "train": {
      "n": 82944,
      "n_H1": 41472,
      "by_format": {
        "afdm": 13824,
        "dfts_ofdm": 13824,
        "ofdm": 13824,
        "ofdm_comb": 13824,
        "otfs": 13824,
        "sc": 13824
      },
      "by_policy_arm": {
        "none": 27648,
        "optimized": 27648,
        "random": 27648
      },
      "by_regime": {
        "comparable": 20704,
        "covert": 41888,
        "detectable": 20352
      },
      "by_channel_family": {
        "doppler": 27648,
        "flat": 27648,
        "multipath": 27648
      }
    },
    "val": {
      "n": 10368,
      "n_H1": 5184,
      "by_format": {
        "afdm": 1728,
        "dfts_ofdm": 1728,
        "ofdm": 1728,
        "ofdm_comb": 1728,
        "otfs": 1728,
        "sc": 1728
      },
      "by_policy_arm": {
        "none": 3456,
        "optimized": 3456,
        "random": 3456
      },
      "by_regime": {
        "comparable": 2400,
        "covert": 5136,
        "detectable": 2832
      },
      "by_channel_family": {
        "doppler": 3456,
        "flat": 3456,
        "multipath": 3456
      }
    },
    "test_iid": {
      "n": 10368,
      "n_H1": 5184,
      "by_format": {
        "afdm": 1728,
        "dfts_ofdm": 1728,
        "ofdm": 1728,
        "ofdm_comb": 1728,
        "otfs": 1728,
        "sc": 1728
      },
      "by_policy_arm": {
        "none": 3456,
        "optimized": 3456,
        "random": 3456
      },
      "by_regime": {
        "comparable": 2528,
        "covert": 5248,
        "detectable": 2592
      },
      "by_channel_family": {
        "doppler": 3456,
        "flat": 3456,
        "multipath": 3456
      }
    },
    "test_ood": {
      "n": 10368,
      "n_H1": 5184,
      "by_format": {
        "afdm": 1728,
        "dfts_ofdm": 1728,
        "ofdm": 1728,
        "ofdm_comb": 1728,
        "otfs": 1728,
        "sc": 1728
      },
      "by_policy_arm": {
        "none": 3456,
        "optimized": 3456,
        "random": 3456
      },
      "by_regime": {
        "comparable": 2528,
        "covert": 5216,
        "detectable": 2624
      },
      "by_channel_family": {
        "doppler": 10368
      }
    }
  },
  "totals": {
    "n_samples": 114048,
    "n_cells": 864,
    "n_files": 7,
    "total_bytes": 1121412270,
    "total_MiB": 1069.462,
    "equal_per_format": true,
    "by_format": {
      "afdm": 19008,
      "dfts_ofdm": 19008,
      "ofdm": 19008,
      "ofdm_comb": 19008,
      "otfs": 19008,
      "sc": 19008
    },
    "by_policy_arm": {
      "none": 38016,
      "optimized": 38016,
      "random": 38016
    },
    "by_regime": {
      "comparable": 28160,
      "covert": 57488,
      "detectable": 28400
    }
  },
  "storage": {
    "format": "parquet (zstd), fixed_size_list<float32> Y",
    "reshape": "y_real / y_imag are length R*T=1280; reshape to (R,T)=(4,320); Y = y_real + 1j*y_imag",
    "features_note": "model input x=[Re,Im,|Y|^2] is recomputed from Y (per-minibatch energy scale); not stored"
  },
  "schema": [
    {
      "name": "label",
      "dtype": "B",
      "meaning": "hypothesis: 1 = H1 (collaboration signal present), 0 = H0 (noise only)"
    },
    {
      "name": "split",
      "dtype": "s",
      "meaning": "train | val | test_iid | test_ood"
    },
    {
      "name": "format",
      "dtype": "s",
      "meaning": "waveform family: sc | ofdm | dfts_ofdm | otfs | afdm | ofdm_comb"
    },
    {
      "name": "policy_arm",
      "dtype": "s",
      "meaning": "none (no collaborative matrix) | random | optimized"
    },
    {
      "name": "policy_kind",
      "dtype": "s",
      "meaning": "identity | random | optimized:sphericity"
    },
    {
      "name": "n_tx",
      "dtype": "i",
      "meaning": "M: number of collaborating transmit users"
    },
    {
      "name": "n_msg_users",
      "dtype": "i",
      "meaning": "K: number of message-bearing users"
    },
    {
      "name": "msg_dim",
      "dtype": "i",
      "meaning": "d: message length per user (Kd = K*d)"
    },
    {
      "name": "kd",
      "dtype": "i",
      "meaning": "Kd: total message dimension"
    },
    {
      "name": "n_rx_eve",
      "dtype": "i",
      "meaning": "N_E = R: Eve's antenna count (fixed = 4)"
    },
    {
      "name": "n_samples_t",
      "dtype": "i",
      "meaning": "T: samples per block (fixed = 320); reshape y_real/y_imag to (R,T)"
    },
    {
      "name": "eve_snr_db",
      "dtype": "f",
      "meaning": "Eve's average received SNR (dB) -- sets the observed noise level"
    },
    {
      "name": "bob_snr_db",
      "dtype": "f",
      "meaning": "Bob's average received SNR (dB) = eve_snr_db - delta_db"
    },
    {
      "name": "delta_db",
      "dtype": "f",
      "meaning": "Delta = SNR_E - SNR_B (dB); <0 covert (Eve weaker), >0 detectable"
    },
    {
      "name": "regime",
      "dtype": "s",
      "meaning": "covert | comparable | detectable (from delta_db)"
    },
    {
      "name": "policy_design_snr_db",
      "dtype": "f",
      "meaning": "optimized W design Eve-SNR (dB); NaN for none/random"
    },
    {
      "name": "channel_family",
      "dtype": "s",
      "meaning": "flat | multipath | doppler"
    },
    {
      "name": "n_taps",
      "dtype": "i",
      "meaning": "delay taps (1 = flat)"
    },
    {
      "name": "nu_max",
      "dtype": "f",
      "meaning": "max normalized Doppler (cycles/sample); 0 for flat/multipath"
    },
    {
      "name": "pdp_decay",
      "dtype": "f",
      "meaning": "exponential power-delay-profile decay"
    },
    {
      "name": "noise_kind",
      "dtype": "s",
      "meaning": "receiver noise model (white for this artifact)"
    },
    {
      "name": "nuisance",
      "dtype": "b",
      "meaning": "per-block RF nuisances (CFO/timing/phase/gain) applied"
    },
    {
      "name": "constellation",
      "dtype": "s",
      "meaning": "data constellation (qpsk)"
    },
    {
      "name": "cell_id",
      "dtype": "I",
      "meaning": "factorial cell index (0..n_cells-1)"
    },
    {
      "name": "group_id",
      "dtype": "i",
      "meaning": "group index within the cell"
    },
    {
      "name": "base_seed",
      "dtype": "L",
      "meaning": "master seed for the whole build"
    }
  ],
  "y_sha256_per_split": {
    "train": "ce98056ef5f92c160958b1b7d1c9ff042b2bdeed16b0d47f1d37f754f22b970f",
    "val": "b4b10bc37fdae0c73acf8a84bd32809a1a18092cef1fe9ee67cb83c68328c8d6",
    "test_iid": "dbb5768bf3397992111d69970862ecae9e9c65fe49a9a2c08894c179394d4375",
    "test_ood": "1ef71a5a69a9f4b7175a6e03c0e6e576e1c9945bfb8a0fcf6276b006a582011f"
  },
  "regeneration": {
    "generate": "uv run --extra hf covcollab-eve-controlled --out huggingface/covcollab-eve-detection --base-seed 7000 --per 16 --groups-core 10 --groups-ood 3 --opt-steps 40 --opt-batch 96",
    "verify": "uv run --extra hf covcollab-eve-controlled --out huggingface/covcollab-eve-detection --base-seed 7000 --per 16 --groups-core 10 --groups-ood 3 --opt-steps 40 --opt-batch 96 --verify"
  },
  "files": [
    {
      "file": "data/train-00000.parquet",
      "split": "train",
      "rows": 24576
    },
    {
      "file": "data/train-00001.parquet",
      "split": "train",
      "rows": 24576
    },
    {
      "file": "data/train-00002.parquet",
      "split": "train",
      "rows": 24576
    },
    {
      "file": "data/train-00003.parquet",
      "split": "train",
      "rows": 9216
    },
    {
      "file": "data/val-00000.parquet",
      "split": "val",
      "rows": 10368
    },
    {
      "file": "data/test_iid-00000.parquet",
      "split": "test_iid",
      "rows": 10368
    },
    {
      "file": "data/test_ood-00000.parquet",
      "split": "test_ood",
      "rows": 10368
    }
  ]
}