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PreprintarXiv licencearXiv

Efficient Transmit Waveform Design for MIMO-OFDM DFRC Systems with 1-Bit DACS

  • Chenfei Huang
  • Mingjie Shao
  • Ya-Feng Liu
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Abstract

This paper studies efficient waveform design for MIMO-OFDM dual-functional radar-communication (DFRC) systems with 1-bit digital-to-analog converters (DACs), which remains underexplored in the literature. We formulate the DFRC waveform design problem by maximizing the trace of the target angular Fisher information matrix (FIM), subject to symbol-error probability constraints realized via constructive interference (CI) and a time-domain 1-bit transmit alphabet constraint. The resulting problem is a large-scale nonlinear integer programming problem. We develop an inexact alternating direction method of multipliers (ADMM) algorithm with alternating time- and frequency-domain updates. The proposed scheme enables subcarrier-wise optimization in the frequency domain and closed-form primal and dual updates in the time domain. In particular, the CI constraints are deliberately retained in both the time- and frequency-domain subproblems to promote the feasibility of intermediate iterates and improve the convergence behavior of ADMM. Simulation results demonstrate promising DFRC performance.

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Cite

BibTeXRIS
BibTeX
@misc{huang2026efficient,
  title = {{Efficient Transmit Waveform Design for MIMO-OFDM DFRC Systems with 1-Bit DACS}},
  author = {Chenfei Huang and Mingjie Shao and Ya-Feng Liu},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.36745},
  eprint = {2609.36745},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.36745},
}
RIS
TY  - UNPB
TI  - Efficient Transmit Waveform Design for MIMO-OFDM DFRC Systems with 1-Bit DACS
AU  - Chenfei Huang
AU  - Mingjie Shao
AU  - Ya-Feng Liu
PY  - 2026
DA  - 2026/09/29
PB  - arXiv
DO  - 10.48550/arxiv.2609.36745
UR  - https://arxiv.org/abs/2609.36745
AB  - This paper studies efficient waveform design for MIMO-OFDM dual-functional radar-communication (DFRC) systems with 1-bit digital-to-analog converters (DACs), which remains underexplored in the literature. We formulate the DFRC waveform design problem by maximizing the trace of the target angular Fisher information matrix (FIM), subject to symbol-error probability constraints realized via constructive interference (CI) and a time-domain 1-bit transmit alphabet constraint. The resulting problem is a large-scale nonlinear integer programming problem. We develop an inexact alternating direction method of multipliers (ADMM) algorithm with alternating time- and frequency-domain updates. The proposed scheme enables subcarrier-wise optimization in the frequency domain and closed-form primal and dual updates in the time domain. In particular, the CI constraints are deliberately retained in both the time- and frequency-domain subproblems to promote the feasibility of intermediate iterates and improve the convergence behavior of ADMM. Simulation results demonstrate promising DFRC performance.
ER  -