Time-domain broadband spatial matrix filter designing method

A designing method of time-domain broadband matrix spatial pre-filtering was investigated. Firstly, the matrixes of matrix spatial pre-filter for frequency bins were deduced by optimal-designing-method. Secondly, the volumes of all weighting matrixes corresponding to the same output were put together to construct N groups of weighting vectors. Then, spatial broadband FIR filters corresponding to group of weighting vectors were designed. Finally, these N spatial broadband FIR filters were synthesized to construct the time domain broadband matrix filter. Using it, element-data can be spatial pre-filter in time-domain. So it can improve real-time probability of system. Results of simulation and lake-experiments verify the approach developed.