Patent ID: 11894010
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 11:
12. The signal processing device according to claim 10 or 11, wherein
the estimation unit includes:
a matrix estimation unit that estimates an inverse matrix of a space-time covariance matrix of the first time interval on the basis of the frequency-divided observation signals, the power or estimated power of the target signals, and an inverse matrix of a space-time covariance matrix of the second time interval that is further in the past than the first time interval; and
a convolutional beamformer estimation unit that acquires the convolutional beamformer of the first time interval on the basis of the inverse matrix of the space-time covariance matrix of the first time interval and the estimated steering vector.