Simultaneous channel estimation of a carrier and an interferer
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorFredrik Huss
Life of this patent
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Abstract
Interference suppression in a receiver in a wireless network that utilizes training sequences for synchronization and channel estimation, wherein the training sequence of an interfering channel overlaps the training sequence of a desired channel to cause degraded channel estimation, by generating a channel estimate for a carrier part of a received signal; generating a residual signal where the carrier part has been removed from the received signal; generating covariance matrix estimates for interferer channel estimate candidates; selecting carrier and interferer channel estimates having the lowest energy in the covariance matrix; and, explicitly generating the selected interferer channel estimate.
Claims16
A method of interference suppression in a receiver in a wireless network that utilizes training sequences for synchronization and channel estimation, wherein the training sequence of an interfering channel overlaps the training sequence of a desired channel to cause degraded channel estimation, said method comprising the steps of:
- generating channel estimates for a carrier part of a received signal;
- generating residual signals where the carrier parts have been removed from the received signal;
- generating noise covariance matrix estimates for interferer channel estimate candidates;
- selecting carrier and interferer channel estimates having the lowest energy in the covariance matrix;
- and,
- explicitly generating the selected interferer channel estimate.
An apparatus for interference suppression in a receiver in a wireless network that utilizes training sequences for synchronization and channel estimation, wherein the training sequence of an interfering channel overlaps the training sequence of a desired channel to cause degraded channel estimation, said apparatus comprising:
- means for generating channel estimates for a carrier part of a received signal;
- means for generating residual signals where the carrier parts have been removed from the received signal;
- means for generating noise covariance matrix estimates for interferer channel estimate candidates;
- means for selecting carrier and interferer channel estimates having the lowest energy in the covariance matrix;
- and,
- means for explicitly generating the selected interferer channel estimate.
In a radio receiver operable to receive a radio signal, the received signal formed of a wanted-signal component portion and at least one interfering-signal component portion, an improved estimator circuit for facilitating processing of the radio signal, said estimator circuit comprising:
- processing circuitry, said processing circuitry operable to:
- generate channel estimated for a carrier part of said received signal;
- generate residual signals where the carrier parts have been removed from the received signal;
- generate noise covariance matrix estimates for interferer channel estimate candidates;
- select carrier and interferer channel estimates having the lowest energy in the covariance matrix;
- and,
- explicitly generate the selected interferer channel estimate.
Dependencies are inferred from the claim text.