An adaptive predistorter for wireless LAN RFSoC with embedded PA and T/R switch in 55nm CMOS
Custom Integrated Circuits Conference（2013）
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.
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Key words
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,DSP,Predistortion,VLSI
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