Mapped ADMM: A Robust Algorithm for 1-Bit mMIMO Detection

Recently, it has been reported that one-bit massive MIMO (mMIMO) detection is equivalent to a binary classification problem that can be solved efficiently using support vector machine (SVM).

Inspired by this result, we first reformulate SVM in a decentralized form consisting of multiple classifiers.

This enables the use of the consensus alternating direction method of multipliers (CADMM), a technique that can improve robustness and performance through its inherent consensus making.

We further update CADMM to output only valid constellation points and achieve significantly improved detection performance.

In our method, by changing the size of the grouped classifiers, we balance the number of classifiers for consensus accuracy with sufficient data per group to ensure classifier robustness.

Ultimately, we demonstrate that our proposed method significantly outperforms existing practically feasible methods for one-bit mMIMO detection.