Year: 2025
Type: article
Abstract: Applying quantum annealing or current quantum- and physics-inspired algorithms for multiple-input multiple-output (MIMO) detection always abandon the direct Gray-coded bit-to-symbol mapping in order to obtain Ising form, leading to inconsistency errors. This often results in slow convergence rates and error floor, particularly with high-order-modulations. We propose HOPbit, an alternative MIMO detector designed to address this issue by transforming the MIMO detection problem into a higher-order Ising problem while maintaining Gray-coded bit-to-symbol mapping. The method then employs the simulated probabilistic bits (p-bits) algorithm to directly solve higher-order Ising problem without degradation. This innovative strategy enables HOPbit to achieve rapid convergence and attain near-optimal maximum-likelihood performance in most scenarios, even those involving high-order-modulations. The experiments show that HOPbit surpasses ParaMax by several orders of magnitude in terms of bit error rate (BER) in the context of 12-user massive and large MIMO systems even with less computing resources. In addition, HOPbit achieves lower BER rates compared to other traditional detectors.
Source: Physical Review Applied
DOI: 10.1103/zmgv-m2ql
Authors: Qing-Guo Zeng, Xiao-Peng Cui, Xian-Zhe Tao, Jia-Qi Hu, Shi-Jie Pan, Wei E.I. Sha, Man-Hong Yung
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4414091923