Patent ID: 11876589
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. The communication device of any one of claim 11, wherein
the 3D transformation function (1,2,3)(·) is given by a two-dimensional Discrete Cosine transformation (2D-DCT) and a 1D-DFT transformation with respect to the space and frequency dimension of the channel tensor, respectively, the codebook matrices Ωn, n=1,2 are given by oversampled DCT matrices, and the codebook matrix Ω3 is given by an oversampled DFT matrix, or
the 3D transformation function (1,2,3)(·) is given by a 3D-DFT transformation and the codebook matrices Ωn, n=1,2,3 are given by oversampled DFT matrices, or
the 2D transformation function (1,2)(·) is given by a 2D-Discrete Cosine transformation (DCT) and the codebook matrices Ωn, n=1,2 are given by oversampled DCT matrices, or
the 1D transformation function (3)(·) is given by a 1D-DFT transformation and the codebook matrix Ω3 is given by an oversampled DFT matrix.