This paper investigates the impact of devices under test (DUTs) with directional antennas on the recreated channel in the over-the-air (OTA) testing for massive multiple-input multiple-output (MIMO) devices using prefaded signal synthesis (PFS) technique. Assuming the uplink in real radio environments. the directional receiver (Rx) antenna patterns would affect the gains in different ... https://halohealthcarers.shop/product-category/first-aid-supplies/