1. Power Efficiency Model for MIMO Transmitters Including Memory Polynomial Digital Predistortion
- Author
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Bram Nauta, Joep Zanen, Eric A.M. Klumperink, and Integrated Circuit Design
- Subjects
Beamforming ,Computer science ,Amplifier ,020208 electrical & electronic engineering ,MIMO ,Transmitter ,020206 networking & telecommunications ,Efficiency ,02 engineering and technology ,Digital signal processing ,Precoding ,Predistortion ,Digital predistortion ,Power consumption ,Power amplifier ,0202 electrical engineering, electronic engineering, information engineering ,Electronic engineering ,Array gain ,Electrical and Electronic Engineering ,Electrical efficiency - Abstract
Multiple-input multiple-output (MIMO) beamforming array gain can make multi-antenna transmitters (TXs) more power efficient. However, these MIMO TXs require more complex digital predistortion (DPD). In this work, analytical expressions are derived for the power consumption of both MIMO power amplifier (PA) arrays and their respective DPD, taking into account the effects of precoding on PA output power and peak-toaverage power ratio (PAPR). It is shown that for complex DPD algorithms such as cross-over DPD (CO-DPD) in combination with wide bandwidths, the overall DPD power consumption can exceed the overall PA power consumption already for TXs for scenarios with more than two antennas.
- Published
- 2021