Frequency domain training of prefilters for receivers
AssigneeTexas Instruments Incorporated
InventorsSirikiat L. Ariyavisitakul, Manoneet Singh
Life of this patent
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Abstract
A prefilter is trained as follows. The frequency response B of a conditioned channel is determined without reference to the prefilter, and the frequency response W of the prefilter is computed from the frequency response B of the conditioned channel.
Claims50
A method for operating a receiver to recover data contained in a signal received from a communications channel, the method comprising:
- determining a frequency response of a conditioned channel without reference to a prefilter, wherein the conditioned channel has a delay spread that is shorter than a delay spread of the communications channel;
- determining a frequency response of the communications channel;
- computing a frequency response of the prefilter from the frequency response of the conditioned channel and the frequency response of the communications channel;
- receiving the signal transmitted across the communications channel;
- applying the prefilter to the received signal;
- and
- processing the prefiltered signal to estimate the data contained in the signal.
A receiver for receiving a signal transmitted across a communications channel, the signal containing data, the receiver comprising:
- a training module comprising:
- a first module for determining a frequency response of a conditioned channel without reference to a prefilter, wherein the conditioned channel has a delay spread that is shorter than a delay spread of the communications channel;
- and
- a second module for computing a frequency response of the prefilter from the frequency response of the conditioned channel and a frequency response of the communications channel;
- a prefilter module coupled to the training module for applying the prefilter to the received signal transmitted across the communications channel;
- and
- circuitry for recovering data from the prefiltered signal.
A receiver for receiving a signal transmitted across a communications channel, the signal containing data, the receiver comprising:
- means for determining a frequency response of a conditioned channel without reference to a prefilter, wherein the conditioned channel has a delay spread that is shorter than a delay spread of the communications channel;
- means for computing a frequency response of the prefilter from the frequency response of the conditioned channel and a frequency response of the communications channel;
- and
- means for applying the prefilter to the received signal;
- and
- means for recovering data from the prefiltered signal.
Dependencies are inferred from the claim text.