The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 2006
Filed:
Apr. 04, 2000
Aleksandar Purkovic, Potomac, MD (US);
Steven A. Tretter, Silver Spring, MD (US);
Aleksandar Purkovic, Potomac, MD (US);
Steven A. Tretter, Silver Spring, MD (US);
Nortel Networks Ltd, , CA;
Abstract
A system, device, and method for time-domain equalizer training uses a two-pass auto-regressive moving average model. A communication channel is first modeled using ppoles and qzeros to form a first shortened channel impulse response having a first approximation H(z)=B(z)/1+A(z), wherein q, is greater than a predetermined cyclic prefix length. A time-mirrored image of the first shortened channel impulse response is then formed, and the resulting time-mirrored image of the first shortened channel impulse response is modeled using ppoles and qzeros to form a second shortened channel impulse response having a second approximation H(z)=B(z)/1+A(z), wherein qis less than or equal to the predetermined cyclic prefix length. The time-domain equalizer coefficients are determined by combining A(z) and A(1/z) with an appropriate amount of delay.