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arXiv · 2609.30129

Study of Iterative Detection and Decoding for {Mixed Near- and Far-Field} XL-MIMO Systems

Nayyab Haider·Rodrigo C. de Lamare
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Abstract

Extra-large multiple-input multiple-output (XL-MIMO) systems {serving users across near-field and far-field regions} experience spherical wavefront propagation that provides enhanced spatial resolution over traditional far-field systems. In this work, we propose a novel weighted rate (WR) ordering-based successive interference cancellation (SIC) scheme that exploits the spatial degrees of freedom inherent in near-field propagation. We also develop an iterative detection and decoding (IDD) framework that integrates the proposed WR ordering with low-density parity-check (LDPC) coding and channel estimation. We then analyze the information rates and the impact of near-field channel characteristics. Numerical results show that the proposed WR-SIC and the IDD scheme outperform existing approaches.

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Nayyab Haider, Rodrigo C. de Lamare. 2026-09-24. Study of Iterative Detection and Decoding for {Mixed Near- and Far-Field} XL-MIMO Systems. https://arxiv.org/abs/2609.30129

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