Predistortion Techniques for Vector Perturbation Precoding of One-Bit Massive-MIMO
Résumé
Massive MIMO aims to build wireless base stations with hundreds of coherently operating antennas serving tens of single antenna users in order to improve the capacity by a factor of 10-50 and the energy-efficiency trade-off by up to a thousand times. One-bit quantized precoding has been proposed to efficiently handle the RF front-end when the array is implemented with so many antennas. In this paper, we modify signal dynamic range reduction techniques such as active constellation extension (ACE) to perform symbol vector perturbation prior to the one-bit quantization. The resulting one-bit quantization of the perturbed vector provides a non-linear precoding with low complexity. Our simulations show that the proposed vector precoding outperforms both one-bit quantized Zero-Forcing and the much more complex vector perturbation precoding.
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