Details

Autor(en) / Beteiligte

• Lu, Eric
• Li, Wen-Kai
• Deng, Zhiming
• Rostami, Edris
• Wu, Pi-An
• Chang, Keng-Meng
• Chuang, Yu-Chen
• Lai, Chang-Ming
• Chen, Yang-Chuan
• Peng, Tzu-Hsuin
• Tsai, Tzung-Chuen
• Liu, Hui-Hsien
• Chiu, Chien-Chih
• Huang, Bryan
• Wang, Yao-Chi
• Zhan, Jing-Hong Conan
• Shanaa, Osama

Titel

10.4 A 4×4 Dual-Band Dual-Concurrent WiFi 802.11ax Transceiver with Integrated LNA, PA and T/R Switch Achieving +20dBm 1024-QAM MCS11 Pout and −43dB EVM Floor in 55nm CMOS

Ist Teil von

• 2020 IEEE International Solid- State Circuits Conference - (ISSCC), 2020, p.178-180

Ort / Verlag

IEEE

Erscheinungsjahr

2020

Quelle

IEEE/IET Electronic Library

Beschreibungen/Notizen

• 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 1024-QAM 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 receive (RX) EVM is required for 1024-QAM signals derived by fading-channel model emulation and field measurements. Such new features have posed stringent requirements to in-band distortion/noise of both TX and RX as well as the TX emission, especially in the RU case (minimum 2MHz) due to higher power density.