Pith Number

pith:SR3Z6LBZ

pith:2015:SR3Z6LBZQQY3PEUSXXJOWMM2RP

not attested not anchored not stored refs pending

A Simple DFT-aided Spatial Basis Expansion Model and Channel Estimation Strategy for TDD/FDD Massive MIMO Systems

Feifei Gao, Hongxiang Xie, Shi Jin, Shun Zhang

arxiv:1511.04841 v6 · 2015-11-16 · cs.IT · math.IT

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SR3Z6LBZQQY3PEUSXXJOWMM2RP}

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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	2026-05-18T01:23:07.895819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

94779f2c398431b79292bdd2eb319a8bc4accad35789980f1d7e8798993c0d00

Aliases

arxiv: 1511.04841 · arxiv_version: 1511.04841v6 · doi: 10.48550/arxiv.1511.04841 · pith_short_12: SR3Z6LBZQQY3 · pith_short_16: SR3Z6LBZQQY3PEUS · pith_short_8: SR3Z6LBZ

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/SR3Z6LBZQQY3PEUSXXJOWMM2RP \
  | 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: 94779f2c398431b79292bdd2eb319a8bc4accad35789980f1d7e8798993c0d00

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52c6df10ae5dd5b0ab7fc0ef808bb219fc2a9ac61d1e47e69b72abd5538b7528",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-11-16T06:34:42Z",
    "title_canon_sha256": "5584bec1ad68c62ff8bfc6f68daa4937789e383917ac305cca9ae9044903c6e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.04841",
    "kind": "arxiv",
    "version": 6
  }
}