A 39-Ghz CMOS Bi-Directional Doherty Phased-Array Beamformer Using Shared-LUT DPD with Inter-Element Mismatch Compensation Technique for 5G Base-Station

Zheng Li,Jian Pang,Yi Zhang,Yudai Yamazaki,Qiaoyu Wang,Peng Luo,Weichu Chen,Yijing Liao,Minzhe Tang, Zhongling Guo,Yun Wang,Xi Fu,Dongwon You,Naoki Oshima, Shingo Hori, Kazuaki Kunihiro,Atsushi Shirane, Kei Okada

2022 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits)（2022）

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摘要

This work demonstrates a 39-GHz CMOS phased-array beamformer with the bi-directional Doherty PA-LNA. An inter-element mismatch compensation technique is introduced for improving the shared-LUT DPD performance over the PVT variations. By utilizing the proposed mismatch compensation, the measured 64-QAM OFDMA-mode EVM and ACLR with the shared-LUT DPD are improved from −22.4dB to −25.0dB and from −28.7dBc to −32.1dBc, respectively.

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