# RLS Precoding for Massive MIMO Systems with Nonlinear Front-End

arXiv: https://arxiv.org/abs/1905.05227 · HTML: https://mlsanity.com/paper/1905.05227/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 13 May 2019.

## Built on by (most cited first, 1 of 1)

- [Towards Designing Optimal Sensing Matrices for Generalized Linear Inverse Problems](https://mlsanity.com/paper/2111.03237/) (2021)

## Abstract (arXiv)

To keep massive MIMO systems cost-efficient, power amplifiers with rather small output dynamic ranges are employed. They may distort the transmit signal and degrade the performance. This paper proposes a distortion aware precoding scheme for realistic scenarios in which RF chains have nonlinear characteristics. The proposed scheme utilizes the method of regularized least-squares (RLS) to jointly compensate the channel impacts and the distortion imposed by the RF chains. To construct the designed transmit waveform with low computational complexity, an iterative algorithm based on approximate message passing is developed. This algorithm is shown to track the achievable average signal distortion of the proposed scheme tightly, even for practical system dimensions. The results demonstrate considerable enhancement compared to the state of the art.