Pith Number

pith:2PTOLPVB

pith:2026:2PTOLPVBGEOAE5DXRBM2OEP43H

not attested not anchored not stored refs pending

Baseband-Efficient WMMSE Precoding: From a Signal Weighting Cost Perspective

Fan Xu, Lei Qiu, Mian Li, Qingjiang Shi, Shuai Gao, Xinzhi Ning, Ye Yang

Sparse row-sparse precoding architectures within the WMMSE framework reduce signal weighting operations in MU-MIMO while preserving near-optimal sum rate via a proven low-dimensional subspace property.

arxiv:2605.18368 v1 · 2026-05-18 · eess.SP

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\usepackage{pith}
\pithnumber{2PTOLPVBGEOAE5DXRBM2OEP43H}

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Record completeness

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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.

Claims

C1strongest claim

We rigorously prove, for the first time, that the optimal precoder under both sparse architectures strictly resides in a specific low-dimensional subspace determined by the channel matrices, thereby reducing the dimensionality of the optimization variables.

C2weakest assumption

The assumption that the mixed-integer non-linear program remains tractable and that the alternating optimization with penalty-based MM converges to a solution whose sum-rate loss is negligible when the subspace reduction is applied; this is invoked in the transition from the MINLP formulation to the WMMSE alternating algorithm.

C3one line summary

Receipt and verification

First computed	2026-05-20T00:05:57.591939Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3e6e5bea1311c0274778859a711fcd9fda2ee2cc04b5548678a7bf125914daa

Aliases

arxiv: 2605.18368 · arxiv_version: 2605.18368v1 · doi: 10.48550/arxiv.2605.18368 · pith_short_12: 2PTOLPVBGEOA · pith_short_16: 2PTOLPVBGEOAE5DX · pith_short_8: 2PTOLPVB

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/2PTOLPVBGEOAE5DXRBM2OEP43H \
  | 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: d3e6e5bea1311c0274778859a711fcd9fda2ee2cc04b5548678a7bf125914daa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1aa0a2b12a8721cf6f116ffd73119685ac5212610bae763ede2c53d3c5238a9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2026-05-18T13:18:30Z",
    "title_canon_sha256": "316be2f933222a1b6b9ad85af99c3e7f3fb26ebecadec9e06c0f3b43589f9cf5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.18368",
    "kind": "arxiv",
    "version": 1
  }
}