Time domain equalization using frequency domain operations

Details Time domain equalization using frequency domain operations Time domain equalization using frequency domain operations

2003-05-19

2009-11-24

Ghayour, Mohammad H (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S232000, C375S350000

Reexamination Certificate

active

07623578

ABSTRACT:
An equalizer for a multi carrier transmission system, converts a transmitted multi carrier signal into sampled frequency domain signals, and suppresses time domain delay dispersion, on the sampled frequency domain signals. It exploits circulant decomposition of a Toeplitz matrix to enable the computationally heavy evaluation of a matrix multiplied by a vector, to be avoided. Increased precision arises from the frequency domain processing being equivalent to a longer time domain FIR filter than is normally practical. The amount of compensation for different carriers can be adjusted, which can lead to increased precision.

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International Search Report from corresponding International Application No. PCT/BE03/00087, filed May 19, 2003.
International Search Report from related International Application No. PCT/BE03/00088, filed May 19, 2003.
Van Acker, K et al.,Frequency Domain Equalization with Tone Grouping in DMT/ADSL-Receivers, Signals, Systems, and Computers, 1999, Conference Record of the Thirty-Third Asilomar Conference n Oct. 24-27, 1999, Piscataway, NJ. pp. 1067-1070, XP010373800.
Van Acker, K et al.,Per Tone Equalization for DMT-Based Systems, IEEE Transactions on Communications, vol. 49, No. 1, Jan. 2001, pp. 109-119, XP001038829.

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