Pith Number

pith:NQCS7TGU

pith:2019:NQCS7TGU4LVKI4S4L2WNSQWF7G

not attested not anchored not stored refs pending

Optimal Preamble Length for Spectral Efficiency in Grant-Free RA with Massive MIMO

Daiming Qu, Hao Jiang, Jie Ding

arxiv:1905.00005 v1 · 2019-04-30 · eess.SP · cs.IT · math.IT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NQCS7TGU4LVKI4S4L2WNSQWF7G}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:47:15.347601Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c052fccd4e2eaa4725c5eacd942c5f9a83e209c3498521a4de8e86c2f8ef90b

Aliases

arxiv: 1905.00005 · arxiv_version: 1905.00005v1 · doi: 10.48550/arxiv.1905.00005 · pith_short_12: NQCS7TGU4LVK · pith_short_16: NQCS7TGU4LVKI4S4 · pith_short_8: NQCS7TGU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NQCS7TGU4LVKI4S4L2WNSQWF7G \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 6c052fccd4e2eaa4725c5eacd942c5f9a83e209c3498521a4de8e86c2f8ef90b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9c2cf24fa2c0b986a5d9b2fe135b2e62a14688264325cd443d6e6bb8e1467b3a",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2019-04-30T00:18:32Z",
    "title_canon_sha256": "6686c9338599517e0bd2983e3fec8f3c9f06fba1c91870f842b45cd554370a8b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.00005",
    "kind": "arxiv",
    "version": 1
  }
}