Method for determining the filter coefficients of a digital time domain equalizer for a multicarrier frequency signal
AssigneeSiemens Aktiengesellschaft
InventorsThomas Blinn, Werner Kozek
Life of this patent
Estimating the term…
Abstract
A vector space comprising all of the filter coefficients (heq, opt) for different interfering signals (w(n)) is provided, based on an acquired impulse response (hchan). A linear vector sub-space (popt) comprising all of the optimal filter coefficients (heq, opt) for different interfering signals (w(n)) is established from said vector space using a vector space optimization method. The filter coefficients (heq, opt) are established from the vector sub-space according to the current interfering signal (w(n)) being detected, during ongoing data transmission and at the maximum transmission speed.
Claims7
A method for determining the filter coefficients (heq, opt) of a digital transversal filter (TEQ) for equalization of a multicarrier frequency signal (x(t)) which is transmitted via a dispersive transmission medium,
- in which a vector subspace (popt), which comprises all the filter coefficients (heq) for different disturbance signals (w(n)), is represented by an orthogonal base(e), based on a determined impulse response (hchan) and with the aid of a vector space optimization method, and
- in which the coefficients (ak, opt) which define the optimum filter coefficients (heq, opt) as an element of the vector subspace are determined as a function of the currently estimated disturbance signal (w(n).
The method as claimed in one of the preceding claims, characterized
- in that the linear vector subspace (popt) is defined as a solution of a partial eigen problem relating to the vector space.
Dependencies are inferred from the claim text.