H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/2
H04J 1/00 (2006.01) H04J 1/05 (2006.01) H04J 4/00 (2006.01)
Patent
CA 1109973
ABSTRACT: TDM-FDM arrangement comprising a transfor- mation device for mutually mixing N digital-signals { xk(n) } k = 1,2,3,...N and for generating N con- version signals ?{ sm(n) } wherein: sm(n) = Image amk xk(n) m = 1,2,3,...N wherein amk represents an element of a constant value of an NxN-matrix A(N) = [amk] . Each of the conversion signals is applied to one of N sig- nal channels which each comprises a sampling rate increase element (SRI-element) and a digital filter having the transfer function Hm(W) wherein: Hm(W) = Image wherein: W1 arbitrary Image These signal channels are connected to an adder for adding the signals occurring in the various signal channels in order to obtain the FDM-signal. If the filter bank which is formed by the digital fil- ters in the various signal channels are described by the filtering matrix - 110 - ?(Wo) = Image and by the filtering matrix Image = Image then between the matrix A(N) and these filtering matrices the following relation exists Image if W1 = 0, and the relation Image A(N)T ?(Wo) = 2IN if W1 ? 0 wherein: A(N)? represents the complex conjugate of A(N); A(N)T represents the transposed matrix of A(N); M represents the increase factor of the SRI-elements; IN represents the NxN identity matrix. - 111 -
300017
Claasen Theodoor A. C. M.
Mecklenbrauker Wolfgang F. G.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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