Title :
An adaptive predistorter for wireless LAN RFSoC with embedded PA and T/R switch in 55nm CMOS
Author :
MUHAMMAD, KHAIRUL SAFUAN ; Ming-Cho Chen ; Kai-Hung Wang ; Kuang-Ping Ma ; Yu-Lin Hiseh ; Wei-Show Hsu ; Yuan-Yu Fu ; Meng-Chang Lee ; Shuo-Yuan Hsiao ; Chih-Ming Hung
Author_Institution :
MStar Semicond. Inc., Chupei, Taiwan
Abstract :
We present an adaptive predistortion system for a WLAN transceiver in 55nm CMOS. The forward DSP path utilizes complex gain predistortion while the APD module in the feedback path computes AMAM and AMPM coefficients by comparing ideal transmit signal with the distorted signal from the receiver. This module operates with various calibration signals generated on-chip in addition to TX data. Measurement results show improvement of EVM by 1dB with the proposed approach. Improvement of P1dB of more than 3dB was obtained using fully automatic processing. The total solution utilizes 120k gates.
Keywords :
power amplifiers; system-on-chip; transceivers; wireless LAN; AMAM; AMPM; CMOS; DSP; RFSoC; T/R switch; WLAN transceiver; adaptive predistorter; embedded PA; gain predistortion; size 55 nm; wireless LAN; CMOS integrated circuits; Calibration; Distortion; Power generation; Predistortion; Transceivers; Wireless LAN; CMOS; DSP; Predistortion; VLSI;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2013 IEEE
Conference_Location :
San Jose, CA
DOI :
10.1109/CICC.2013.6658499
