Time domain equalization using frequency domain operations
US7623578B2 · kind B2 · utility
3Cited by
2References
16Claims
0Family size
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Key dates
| Filing date | May 19, 2003 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Oct 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2647
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.