Massive MIMO Detector

MMSE based detector having binary structure reduces computational latency for Massive MIMO

Massive multi-user multiple-input multiple-output (MU-MIMO) relies on large antenna arrays that serve tens of user equipments in the same time-frequency resource. The presence of hundreds of antenna elements and radio-frequency (RF) chains at the base station (BS) enables high spectral efficiency via fine-grained beamforming, but poses significant practical implementation challenges. In particular, conventional linear equalization algorithms used in the massive MU-MIMO uplink (users transmit to the BS), such as zero-forcing, typically require centralized architectures, which cause excessively high computational complexity and interconnect bandwidth between the baseband processing unit and the RF chains. Binary structured MMSE mitigates the complexity and bandwidth bottlenecks.