Exploiting Spatial Modulation for Strong PhaseNoise Mitigation in mmWave Massive MIMO
Abstract
This letter investigates phase noise (PN) mitigation in generalized receiver spatial modulation (GRSM) massive MIMO systems at mmWave under a common local oscillator (CLO). Under CLO, the received energy remains invariant relative to the no-PN scenario, enabling reliable energy-based spatial detection using the no-PN threshold. PN-sensitivity and geometry-based metrics are introduced to design compact, PN-resilient MQAM symbol pools with low detection complexity. PN robustness is further improved through an enhanced PN-aware GRSM-MQAM system that exploits spatial modulation (SM) to recover part of the MQAM bits and strategically maps spatial-pattern Hamming weights to reduce the effective PN impact. In addition, a practical single-stage PN estimation/compensation architecture is proposed, while a benchmark double-stage compensation is adopted to quantify the upper bound achievable via separate Tx/Rx PN mitigation. Results show that under PN, the overall BER is mainly dominated by MQAM symbol detection errors, especially for denser constellations, whereas spatial detection remains robust. The proposed single-stage compensation improves PN resilience, while the benchmark double-stage compensation approaches near PN-free performance.
Cite
@article{arxiv.2603.11030,
title = {Exploiting Spatial Modulation for Strong PhaseNoise Mitigation in mmWave Massive MIMO},
author = {Oshin Daoud and Haifa Fares and Amor Nafkha and Yahia Medjahdi and Laurent Clavier},
journal= {arXiv preprint arXiv:2603.11030},
year = {2026}
}