Switch-DFT: Adaptive Waveform and MIMO Switching for Energy-Efficient Base Stations
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866911639394058240 |
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| author | Park, Jaebum Chae, Chan-Byoung Heath Jr, Robert W. |
| author_facet | Park, Jaebum Chae, Chan-Byoung Heath Jr, Robert W. |
| contents | Energy efficiency has emerged as a critical challenge in modern base stations (BSs), as the power amplifier (PA) consumes a substantial portion of the total power due to its limited efficiency. We investigate waveform and mode adaptation to enhance the energy efficiency of BSs. We propose Switch-DFT, an adaptive switching framework that selects between cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) and discrete Fourier transform-spread-OFDM (DFT-s-OFDM) waveforms, as well as between single-input multiple-output (SIMO) and multiple-input multiple-output (MIMO) modes. Switch-DFT improves efficiency by reducing PA backoff with DFT-s-OFDM and achieves the target rate at lower power by leveraging higher MIMO throughput. This results in superior energy efficiency over a wide range of the spectral efficiencies compared with static configurations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_27192 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Switch-DFT: Adaptive Waveform and MIMO Switching for Energy-Efficient Base Stations Park, Jaebum Chae, Chan-Byoung Heath Jr, Robert W. Signal Processing Energy efficiency has emerged as a critical challenge in modern base stations (BSs), as the power amplifier (PA) consumes a substantial portion of the total power due to its limited efficiency. We investigate waveform and mode adaptation to enhance the energy efficiency of BSs. We propose Switch-DFT, an adaptive switching framework that selects between cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) and discrete Fourier transform-spread-OFDM (DFT-s-OFDM) waveforms, as well as between single-input multiple-output (SIMO) and multiple-input multiple-output (MIMO) modes. Switch-DFT improves efficiency by reducing PA backoff with DFT-s-OFDM and achieves the target rate at lower power by leveraging higher MIMO throughput. This results in superior energy efficiency over a wide range of the spectral efficiencies compared with static configurations. |
| title | Switch-DFT: Adaptive Waveform and MIMO Switching for Energy-Efficient Base Stations |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2603.27192 |