Regularized Ising Formulation for Near-Optimal MIMO Detection using Quantum Inspired Solvers
Abhishek Kumar Singh, Kyle Jamieson, Peter L. McMahon, Davide Venturelli · GLOBECOM 2022 - 2022 IEEE Global Communications Conference · 2022
Optimal MIMO detection is one of the most computationally challenging tasks in wireless systems. We show that the quantum-inspired computing approach based on Coherent Ising Machines (CIMs) is a promising candidate for performing near-optimal MIMO detection. We propose a novel regularized Ising formulation for MIMO detection that mitigates a common error floor issue in the direct approach adopted in the existing literature on MIMO detection using Quantum Annealing. We evaluate our methods using a simplified, quantum-inspired model and show that our methods can achieve a near-optimal performance for several Large MIMO systems, like$16\times 16,20\times 20$, and$24\times 24$MIMO with BPSK modulation.