A Primal-Dual Interior Point Method for Efficient Probe Weighting in MIMO OTA Testing

In over-the-air (OTA) performance testing, the pre-faded synthesis (PFS) method is widely used to reconstruct the spatial profiles of the target channel by assigning appropriate power weights to each probe. Most research uses general-purpose solvers, e.g., CVX, for accurate probe weighting. These off-the-shelf solvers use various interior point methods (IPMs) to solve convex problems but at the cost of consuming significant amounts of time due to their general-purpose nature. This paper presents a specific probe weighting algorithm based on the primal-dual IPM (PD-IPM). The simulation results demonstrate that the proposed algorithm achieves high computational efficiency for probe weighting with the same level of accuracy as CVX.