Back to results
US 7,583,755 B2Granted
Systems, methods, and apparatus for mitigation of nonlinear distortion
AssigneeATI Technologies, Inc.
InventorsXiaoqiang Ma, Azzedine Touzni
Life of this patent
Estimating the term…
Abstract
A method among the embodiments includes calculating a value of a parameter of a nonlinear model of a signal as transmitted into a transmission channel, and applying the calculated value to obtain an estimate of data values carried by the signal. Applications to multicarrier signals are described.
Claims25
A method for estimating a set of data values carried by a received signal, the method performed by a receiver, the method comprising:
- estimating a response of a transmission channel by the receiver, the response estimated at each of a plurality of different carrier frequencies of the received signal;
- calculating a first estimate of a set of data values carried by the received signal by the receiver, the first estimate based on the estimated response of the transmission channel;
- calculating at least one value of a parameter of a nonlinear model of the signal by the receiver, the at least one value based on the first estimate;
- and
- calculating a second estimate of the set of data values by the receiver, the second estimate based on the calculated parameter.
2 more elements
A method for estimating a set of data values carried by a received signal, the method performed by a receiver, the method comprising:
- estimating a response of a transmission channel by the receiver, the response estimated at each of a plurality of different carrier frequencies of the received signal;
- calculating a first estimate of a set of data values carried by the received signal by the receiver, the first estimate based on the estimated response of the transmission channel;
- calculating at least one value of a parameter of a nonlinear model of the signal by the receiver, the at least one value based on the first estimate;
- and
- calculating a second estimate of the set of data values by the receiver, the second estimate based on the calculated parameter,
- wherein the received signal includes a nonlinearity introduced by an amplifier in the signal path, and
- wherein an effect of the nonlinearity is reduced in the second estimate as compared to an effect of the nonlinearity in the first estimate.
4 more elements
An apparatus comprising:
- a channel estimator configured to estimate a response of a transmission channel at each of a plurality of different carrier frequencies of a received signal;
- a first signal estimator configured to calculate a first estimate of a set of data values carried by the received signal based on the estimated response of the transmission channel;
- a parameter estimator configured to calculate a value of a parameter of a nonlinear model of the signal based on the first estimate;
- and
- a second signal estimator configured to calculate a second estimate of the set of data values based on the value of the parameter.
2 more elements
Dependencies are inferred from the claim text.