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

fYear

2013

fDate

22-25 Sept. 2013

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference (CICC), 2013 IEEE

Conference_Location

San Jose, CA

Type

conf

DOI

10.1109/CICC.2013.6658499

Filename

6658499