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US 8,571,160 B2Granted
Frequency estimation
AssigneeNokia Corporation
InventorTeemu Taneli Sipila
Life of this patent
Estimating the term…
Abstract
For estimating a difference between a frequency of a base station and a locally generated frequency of a mobile equipment in a mobile communications network, wherein at least a signal in a plurality of signals transmitted from the base station and received by the mobile equipment comprises a plurality of symbols each of which includes a cyclic prefix, a correlation between a symbol and its cyclic prefix is used for estimating the frequency difference.
Claims38
A method, comprising:
- determining a correlation between a symbol received from a transmitter and a cyclic prefix of the symbol and outputting a result indicative thereof, wherein the correlation is determined based at least in part on the correlation between a late frequency difference estimate and an early frequency difference estimate;
- and
- estimating a frequency difference between a frequency of the transmitter and a locally generated frequency of a receiver according to the result of the correlation between the late frequency difference estimate and the early frequency difference estimate.
An apparatus, comprising:
- correlation determining means for determining a correlation between a symbol received from a transmitter and a cyclic prefix of the symbol and for outputting a result indicative thereof, wherein the correlation is determined based at least in part on the correlation between a late frequency difference estimate and an early frequency difference estimate;
- and
- estimating means for estimating a frequency difference between a frequency of the transmitter and a locally generated frequency of a receiver according to the result of the correlation between the late frequency difference estimate and the early frequency difference estimate.
An apparatus, comprising:
- a processor;
- and
- a memory including computer program code, the memory and the computer program code configured to, with the processor, cause the apparatus at least to determine a correlation between a symbol received from a transmitter and a cyclic prefix of the symbol and output a result indicative thereof, wherein the correlation is determined based at least in part on the correlation between a late frequency difference estimate and an early frequency difference estimate, and
- estimate a frequency difference between a frequency of the transmitter and a locally generated frequency of a receiver according to the result of the correlation between the late frequency difference estimate and the early frequency difference estimate.
1 more element
An apparatus, comprising:
- a processor;
- and
- a memory including computer program code, the memory and the computer program code configured to, with the processor, cause the apparatus at least to generate a correlation between a symbol received from a transmitter and a cyclic prefix of the symbol and output a result indicative thereof, wherein the correlation is determined based at least in part on the correlation between a late frequency difference estimate and an early frequency difference estimate, and
- estimate a frequency difference between a frequency of the transmitter and a locally generated frequency of a receiver according to the result of the correlation between the late frequency difference estimate and the early frequency difference estimate.
1 more element
A mobile equipment, comprising:
- a correlation determiner configured to determine a correlation between a symbol received from a transmitter and a cyclic prefix of the symbol and output a result indicative thereof, wherein the correlation is determined based at least in part on the correlation between a late frequency difference estimate and an early frequency difference estimate;
- and
- an estimator configured to estimate a frequency difference between a frequency of the transmitter and a locally generated frequency of the mobile equipment according to the result of the correlation between the late frequency difference estimate and the early frequency difference estimate.
A mobile equipment, comprising:
- correlation determining means for determining a correlation between a symbol received from a transmitter and a cyclic prefix of the symbol and for outputting a result indicative thereof, wherein the correlation is determined based at least in part on the correlation between a late frequency difference estimate and an early frequency difference estimate;
- and
- estimating means for estimating a frequency difference between a frequency of the transmitter and a locally generated frequency of a mobile equipment according to the result of the correlation between the late frequency difference estimate and the early frequency difference estimate.
A computer program embodied on a computer readable medium, the computer program being configured to control a processor to perform:
- determining a correlation between a symbol received from a transmitter and a cyclic prefix of the symbol and outputting a result indicative thereof, wherein the correlation is determined based at least in part on the correlation between a late frequency difference estimate and an early frequency difference estimate;
- and
- estimating a frequency difference between a frequency of the transmitter and a locally generated frequency of a receiver according to the result of the correlation between the late frequency difference estimate and the early frequency difference estimate.
Dependencies are inferred from the claim text.