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该论文提出了一款4×4双频双并发WiFi 802.11ax收发器，集成了LNA、PA和T/R开关，支持多用户MIMO和OFDMA调制。采用55nm CMOS工艺，实现了+20dBm输出功率下1024-QAM调制的高EVM性能，解决了传统多芯片方案集成度低、功耗高的问题。
EVM Floor in 55nm CMOS Eric Lu1, Wen-Kai Li2, Zhiming Deng1, Edris Rostami1, Pi-An Wu2, Keng-Meng Chang2, Yu-Chen Chuang2, Chang-Ming Lai2, Yang-Chuan Chen1, Tzu-Hsuin Peng2, Tzung-Chuen Tsai2, Hui-Hsien Liu2, Chien-Chih Chiu2, Bryan Huang1, Yao-Chi Wang2, Jing-Hong Conan Zhan2, Osama Shanaa1 MediaTek, San Jose, CA, 2MediaTek, Hsinchu, Taiwan 1 The new WiFi 11ax standard carries several improvements compared to its 11g/ac predecessor. It supports multi-user MIMO and uses OFDMA modulation, which enables users to share the same channel via allocated Resource Units (RU). In addition, it provides transmit power adjustments for better operation in a dense environment. Furthermore, the standard calls for the support of MCS11 1024QAM modulation with target transmit (TX) EVM of -35dB, which results in nearly 25% higher throughput compared to MCS9 256QAM. In order to improve user experience to guarantee signal quality between walls and obstacles, a <-40dB
Transceiver with Integrated LNA, PA and T/R Switch, Achieving +20dBm 1024-QAM MCS11 Pout and -43dB