Pith Number

pith:BDRS4MU2

pith:2018:BDRS4MU2H6LOZKTMFZFMZIMXV5

not attested not anchored not stored refs pending

Non-data-aided SNR Estimation for QPSK Modulation in AWGN Channel

Ahmed Badawy, Amr Mohamed, Tamer Khattab, Tara Salman, Tarek M. Elfouly

arxiv:1810.09937 v1 · 2018-10-20 · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BDRS4MU2H6LOZKTMFZFMZIMXV5}

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	2026-05-18T00:02:28.904007Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08e32e329a3f96ecaa6c2e4acca197af65e80ee1a6d58b2db90166a2b462fa73

Aliases

arxiv: 1810.09937 · arxiv_version: 1810.09937v1 · doi: 10.48550/arxiv.1810.09937 · pith_short_12: BDRS4MU2H6LO · pith_short_16: BDRS4MU2H6LOZKTM · pith_short_8: BDRS4MU2

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/BDRS4MU2H6LOZKTMFZFMZIMXV5 \
  | 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: 08e32e329a3f96ecaa6c2e4acca197af65e80ee1a6d58b2db90166a2b462fa73

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3c0a5bcb278dcce32630b259cc1d7719de7c1cfe08a17c82d3b0d5211fdee3e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2018-10-20T18:01:02Z",
    "title_canon_sha256": "e1783ddc22599d1504c258a81e384ca4b284526881c4adae34597a39c3909fb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.09937",
    "kind": "arxiv",
    "version": 1
  }
}