Method and system for providing a time equalizer for multiline transmission in communication systems

• US 20110206108A1
• Filed: 06/06/2003
• Published: 08/25/2011
• Est. Priority Date: 06/07/2002
• Status: Active Grant

• Current Assignee: Michail Tsatsanis, Ming Gu, Thorkell Dahmann
• Original Assignee: Michail Tsatsanis, Ming Gu, Thorkell Dahmann
• Inventors: Gu, Ming, Tsatsanis, Michail, Gudmundsson, Thorkell
• Granted Patent: US 8,139,658 B2
• Time in Patent Office: Days
• US Class Current: 375/229
• CPC Class Codes: H04B 3/32 Reducing cross-talk, e.g. by compensating
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 2025/03426 transmission using multiple-input and multiple-output channels
• CPC Class Codes: H04L 2025/03445 Time domain
• CPC Class Codes: H04L 2025/03522 Frequency domain
• CPC Class Codes: H04L 2025/03605 Block algorithms
• CPC Class Codes: H04L 25/0248 Eigen-space methods
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 27/0002 analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line duplex arrangements H04L5/143
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601

Abstract

A method and system for multiline transmission in communications systems are described. Eigenvalues are calculated to maximize equalized channel impulse response (1010). Eigenvectors associated with dominant eigenvalues are identified (1020). The eigenvectors are combined into a subspace. Optimization is performed over the subspace to calculate subspace time equalizer coefficients (1030).

Claims

1. A method for multiline transmission, comprising:

calculating eigenvalues to maximize equalized channel impulse response;

identifying eigenvectors associated with dominant eigenvalues;

combining the eigenvectors into a subspace; and

performing optimization over the subspace to calculate subspace time equalizer coefficients.