Noise estimation in communication receivers
AssigneeMarvell International Ltd.
InventorsRonen Mayrench, Daniel Yellin, Yona Perets
Life of this patent
Estimating the term…
Abstract
A method includes receiving at a receiver a signal including reference symbols that is sent over a communication channel from a transmitter to the receiver. A response of the communication channel is estimated by applying one or more weighting values to the reference symbols. A noise correction factor is computed based on the weighting values. An estimate of a noise level in the received signal is computed based on the estimated response of the communication channel and the noise correction factor. The received signal is decoded based on the estimate of the noise level.
Claims18
A method, comprising:
- at a receiver, receiving a signal comprising reference symbols that is sent over a communication channel from a transmitter to the receiver;
- estimating a response of the communication channel by applying weighting values to the reference symbols;
- deriving a noise correction factor directly from the weighting values;
- computing an estimate of a noise level in the received signal based on the estimated response of the communication channel and the noise correction factor;
- and
- decoding the received signal based on the estimate of the noise level,
- wherein the weighting values are chosen by defining a maximum value for the noise correction factor, and adjusting the weighting values such that the noise correction factor does not exceed the maximum value, so as to improve the estimate of the noise level.
Apparatus, comprising:
- a receiver front-end, which is configured to receive a signal comprising reference symbols that is sent from a transmitter to the receiver over a communication channel;
- a channel estimation unit, which is configured to estimate a response of the communication channel by applying weighting values to the reference symbols;
- a correction unit, which is configured to derive a noise correction factor directly from the weighting values;
- and
- a noise estimation unit, which is configured to compute an estimate of a noise level in the received signal based on the estimated response of the communication channel and the noise correction factor,
- wherein the channel estimation unit is configured to choose the weighting values by defining a maximum value for the noise correction factor, and adjusting the weighting values such that the noise correction factor does not exceed the maximum value, so as to improve the estimate of the noise level.
Dependencies are inferred from the claim text.