Weight calculation method, the weight calculation unit, adaptive array antenna, and radar equipment

摘要

PROBLEM TO BE SOLVED: To shorten the computation of a null matrix comparatively requiring the time while restraining the performance degradation of SINR characteristics, when a weight is computed for directing the unwanted-wave direction to zero in a time-space adaptive signal processing system by controlling the weight.;SOLUTION: The target reflecting signal of radar pulses obtained by an adaptive array antenna 11 is received and detected by a receiver 12, and stored at a corresponding-cell place along a receiving timing to the processing-range cell of a length corresponding to a specified distance prepared in a data storage 13. A time-space adaptive signal processor 17 arithmetically operates a covariance matrix from the data of range cells excepting the range cell assumed as the containing of a target signal, and carries out a weight control to an antenna receiving signal by an adaptive weight and uses the antenna receiving signal as an output data in a weight computing circuit 171. A computing system for the null matrix B_n is changed at every processing stage or by stages to a processing stage, the speed of a computing time is increased and the degradation of an SINR is suppressed.;COPYRIGHT: (C)2007,JPO&INPIT