Frequency offset estimation and reduction
AssigneeNokia Solutions and Networks Oy
InventorsToni Aleksi Levanen, Carlos Baquero Barneto
Life of this patent
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Abstract
This document discloses a solution for reducing a frequency offset. According to an aspect, a method comprises: acquiring a signal distorted by the frequency offset; estimating a frequency offset estimate describing the frequency offset; computing coefficients for a frequency-domain filter on the basis of a relation between the frequency offset estimate and a combination of the frequency offset estimate and an index of the frequency-domain filter; and performing frequency-domain filtering of the signal by using the computed coefficients.
Claims12
An apparatus comprising:
- at least one processor;
- and
- at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus to perform:
- acquiring a signal distorted by a frequency offset;
- estimating a frequency offset estimate describing the frequency offset;
- computing coefficients for a frequency-domain filter on the basis of a relation between the frequency offset estimate and a combination of the frequency offset estimate and an index of the frequency-domain filter, wherein the relation is defined as
- Carrier
-
- frequency
-
- offset
-
- estimate
- Carrier
-
- frequency
-
- offset
-
- estimate
- +
- filter
-
- index
- ;
- performing frequency-domain filtering of the signal by using the computed coefficients.
A method comprising:
- acquiring a signal distorted by a frequency offset;
- estimating a frequency offset estimate describing the frequency offset;
- computing coefficients for a frequency-domain filter on the basis of a relation between the frequency offset estimate and a combination of the frequency offset estimate and an index of the frequency-domain filter, wherein the relation is defined as
- Carrier
-
- frequency
-
- offset
-
- estimate
- Carrier
-
- frequency
-
- offset
-
- estimate
- +
- filter
-
- index
- ;
- performing frequency-domain filtering of the signal by using the computed coefficients.
A computer program product embodied on a non-transitory computer-readable medium and comprising a computer program code readable by a computer, wherein the computer program code configures the computer to carry out a computer process comprising:
- acquiring a signal distorted by a frequency offset;
- estimating a frequency offset estimate describing the frequency offset;
- computing coefficients for a frequency-domain filter on the basis of a relation between the frequency offset estimate and a combination of the frequency offset estimate and an index of the frequency-domain filter, wherein the relation is defined as
- Carrier
-
- frequency
-
- offset
-
- estimate
- Carrier
-
- frequency
-
- offset
-
- estimate
- +
- filter
-
- index
- ;
- and
- performing frequency-domain filtering of the signal by using the computed coefficients.
Dependencies are inferred from the claim text.