QuadRF uses Raspberry Pi 5 for 4×4 MIMO SDR, RF visualization, and scalable phased-array support (opens in new tab)

Crowd Supply recently featured QuadRF, a 4x4 MIMO software-defined radio platform designed for spatial RF visualization, beamforming, and phased-array experimentation. The platform includes four coherent transmit/receive channels, swappable dual-polarization antennas, an integrated Raspberry Pi 5, and a browser-based interface for viewing nearby wireless activity. QuadRF uses four coherent antennas to measure differences in signal arrival time and generate a live…