Pith Number

pith:R2Y5C52M

pith:2026:R2Y5C52M63OMAK6JN2JJ56LLSZ

not attested not anchored not stored refs resolved

WHTDM: Walsh-Hadamard Transform Division Multiplexing for Doubly-Selective Channels

Chi Yonggang, Tan Chenxing, Wang Hao, Yuan Zhonghao, Yu Jiaxing, Zhang Kuang

Walsh-Hadamard transform division multiplexing outperforms OFDM in high-mobility channels while cutting transmitter complexity by 2.5 times and eliminating all complex multipliers.

arxiv:2605.14482 v1 · 2026-05-14 · eess.SP

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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

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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

WHTDM with CD-MAMP significantly outperforms conventional OFDM 1-tap MMSE at high mobility, achieving over an order of magnitude lower BER at 120 km/h.

C2weakest assumption

That the equivalent WHT-domain channel matrix remains sufficiently banded for the CD-MAMP equalizer to deliver the reported gains under the specific 3GPP TDL-C model at 28 GHz.

C3one line summary

WHTDM replaces FFT with Walsh-Hadamard transform in OFDM, cuts transmitter complexity 2.5x and eliminates complex multipliers while delivering over an order of magnitude lower BER than 1-tap MMSE OFDM at 120 km/h via CD-MAMP equalization.

References

22 extracted · 22 resolved · 0 Pith anchors

[1] Multicarrier modulation for data transmission: An idea whose time has come, 1990

[2] van Nee and R 1999

[3] Orthogonal time frequency space modu- lation, 2017

[4] Orthogonal time fre- quency space (OTFS) modulation for millimeter-wave communications systems, 2017

[5] Orthogonal time-frequency space modulation: A promising next-generation waveform, 2021

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-17T23:39:06.536039Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8eb1d1774cf6dcc02bc96e929ef96b967b228aef5ba70cde67f810897887ef20

Aliases

arxiv: 2605.14482 · arxiv_version: 2605.14482v1 · doi: 10.48550/arxiv.2605.14482 · pith_short_12: R2Y5C52M63OM · pith_short_16: R2Y5C52M63OMAK6J · pith_short_8: R2Y5C52M

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/R2Y5C52M63OMAK6JN2JJ56LLSZ \
  | 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: 8eb1d1774cf6dcc02bc96e929ef96b967b228aef5ba70cde67f810897887ef20

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f123f937adcb44104ff2ba2b3bc7fb4c1070bcd11c4b1e50734822f7223bfce4",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2026-05-14T07:23:22Z",
    "title_canon_sha256": "0caab10b9fe6065fce3c030960ad7228ed83c1c3e2182dcd02f1a26b59604ebe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.14482",
    "kind": "arxiv",
    "version": 1
  }
}