A Three-Dimensional Matrix Pencil Algorithm Based on Beamspace

For reducing the computational complexity and ensuring the parameter estimation accuracy, a beamspace based three-dimensional (3D) matrix pencil (3D-BMP) algorithm is proposed, which decomposes three-dimensional poles into three one-dimensional poles and estimates the poles of each dimension separately. After pairing the estimated multipath channel poles, the angle-of-arrival (AoA), time-of-flight (ToF) and Doppler frequency shift (DFS) of each effective path are obtained. Experiments demonstrate that the proposed 3D-BMP algorithm has an outstanding performance, both in terms of accuracy and complexity.