Device and method for increasing the bandwidth in a line-connected multicarrier system
AssigneeSiemens Aktiengesellschaft
InventorRobert Klinski
Life of this patent
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Abstract
The invention relates to a device and a method for increasing the bandwidth in a line-connected multicarrier system, the characteristic properties, estimated by a channel estimator of a transmission channel being interpolated/extrapolated by an interpolating/extrapolating device. An equalizer device performs additional equalization of affected carriers in dependence on these interpolated/extrapolated properties, a bit loading device being adapted in dependence on the additional equalization. In this manner, further carriers are available for the data transmission which increases a bandwidth.
Claims9
A device for increasing the bandwidth in a lineconnected multicarrier system, comprising:
- a channel estimator to estimate characteristic properties of a transmission channel;
- a decision stage to correlate a decision stage input data value with a value of a predetermined set of values of a transmission format;
- a bit allocation table to specify an amount of information to be decoded/coded on a carrier of the multicarrier system;
- a bit loading device to change the bit allocation table;
- a noise variance determining device to drive the bit loading device based on a noise variance prevailing on the carriers;
- an interpolation/extrapolation device to interpolate/extrapolate the estimated characteristic properties of the transmission channel;
- and
- an equalizer device to perform additional equalization of carriers in dependence on the interpolated/extrapolated characteristic properties, the bit loading device being driven based on the additional equalization in the equalizer device.
A method for increasing the bandwidth in a line-connected multicarrier system, comprising:
- estimating characteristic properties of a transmission channel;
- interpolating/extrapolating the estimated characteristic properties of the transmission channel for disturbed carriers;
- determining equalizer coefficients for disturbed carriers based on the interpolated/extrapolated characteristic properties;
- modifying a bit loading algorithm based on the equalizer coefficients;
- and
- performing the modified bit loading algorithm for specifying an amount of information to be decoded/coded on a carrier of the multicarrier system.
Dependencies are inferred from the claim text.