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

Claim 13:
14. The communication device of claim 13, wherein
the 4D transformation function (1,2,3,4)(·) is given by a 4D-DFT transformation and the codebook matrices Ωn, n=1,2,3,4 are given by oversampled DFT matrices, or
the 2D transformation/compression function (3,4)(·) is given by a 2D-DFT and the codebook matrices Ωn, n=3,4 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
a 1D transformation function F(3)(·) is given by a 1D-DFT transformation and the codebook matrix Ω3 is given by an oversampled DFT matrix, or
a 1D transformation function F(4)(·) is given by a 1D-DFT transformation and the codebook matrix Ω4 is given by an oversampled DFT matrix.