Pith Number

pith:42OW6HBM

pith:2021:42OW6HBMNK2EF5AJYAEGYXK3UP

not attested not anchored not stored refs pending

Spatial Covariance Matrix Reconstruction for DOA Estimation in Hybrid Massive MIMO Systems with Multiple Radio Frequency Chains

Hongtao Duan, Li You, Wenji Wang, Yinsheng Liu, Yiwei Yan

arxiv:2106.10709 v1 · 2021-06-20 · cs.IT · eess.SP · 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{42OW6HBMNK2EF5AJYAEGYXK3UP}

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	2026-07-05T02:50:52.138635Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e69d6f1c2c6ab442f409c0086c5d5ba3fe17f2dda69c0f3fd64a89e85a54441f

Aliases

arxiv: 2106.10709 · arxiv_version: 2106.10709v1 · doi: 10.48550/arxiv.2106.10709 · pith_short_12: 42OW6HBMNK2E · pith_short_16: 42OW6HBMNK2EF5AJ · pith_short_8: 42OW6HBM

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/42OW6HBMNK2EF5AJYAEGYXK3UP \
  | 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: e69d6f1c2c6ab442f409c0086c5d5ba3fe17f2dda69c0f3fd64a89e85a54441f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88b3df508b102d830963060a71b2383b5569d48785ad46744ea6a433b06fd631",
    "cross_cats_sorted": [
      "eess.SP",
      "math.IT"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2021-06-20T15:09:32Z",
    "title_canon_sha256": "97f68f1e1733cdec1141da9efa3cb58663d6f3d3e7945e056293ee2dfb2de8d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.10709",
    "kind": "arxiv",
    "version": 1
  }
}