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US 7,610,031 B2Granted
Error correction in receiver of radio system
AssigneeNokia Corporation
InventorsNiko Kiukkonen, Jari Junell
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Abstract
The invention relates to a receiver in a radio system that contains receiving means for receiving a signal, amplification means for amplifying the received signal with an amplification step, and means for limiting the frequency band of the amplified signal. The receiver also contains correction means for correcting the step response of the limiting means by using step response information defined in advance. The invention also relates to a method for correcting the step response.
Claims24
A method, comprising:
- receiving a signal at a receiver;
- defining correction coefficients based at least partly on a step response of a filter that is used to filter the received signal;
- changing the amplification value used in the receiver to amplify the received signal by increasing or decreasing the amplification value by an amplification step prior to filtering the received signal;
- filtering the amplified signal;
- and
- correcting a step response distortion caused by the filtering operation and correcting the amplification step when the amplification of the received signal is changed by increasing or decreasing the amplification value by the amplification step, wherein said correcting the step response and the amplification step are performed using the correction coefficients defined in advance.
3 more elements
An apparatus, comprising:
- a definer configured to define correction coefficients, based at least partly on a step response of a filter used to filter a received signal;
- and
- a processor configured to change the amplification value used to amplify the received signal by increasing or decreasing the amplification value by an amplification step prior to filtering the received signal, wherein the processor is further configured to filter the amplified signal, and correct a step response distortion caused by the filtering operation and correcting the amplification step when the amplification of the received signal is changed by increasing or decreasing the amplification value by the amplification step, wherein said correcting the step response and the amplification step are performed using the correction coefficients defined in advance.
An apparatus, comprising:
- receiving means for receiving a signal;
- defining means for defining correction coefficients based at least partly on a step response of a filter that is used to filter the received signal;
- amplification means for changing the amplification value used in the receiver to amplify the received signal by increasing or decreasing the amplification value by an amplification step prior to filtering the received signal;
- filtering means for filtering the received signal;
- correction means for correcting the step response distortion caused by the filtering operation and correcting the amplification step when the amplification of the received signal is changed by increasing or decreasing the amplification value by the amplification step, wherein said correcting the step response and the amplification step are performed using the correction coefficients defined in advance.
2 more elements
Dependencies are inferred from the claim text.