Receiver apparatus, and associated method, for receiving a receive signal transmitted upon a channel susceptible to interference

Claim 2

In a radio receiver operable to receive a receive signal, the receive signal formed of a wanted-signal component portion and at least one interfering-signal component portion, an improvement of apparatus for facilitating processing of the receive signal, said apparatus comprising: a quality measure determiner coupled to receive at least indications of the receive signal, said quality measure determiner for forming at least one quality measure of the receive signal; and an interference detector also coupled to receive the at least indications of the receive signal and indications of the at least one quality measure of the receive signal determined by said quality measure determiner, said interference detector for detecting the wanted signal-component portion of the receive signal and for selectively detecting also the at least one interfering signal component portion to permit selective suppression of the at least one interfering signal component portion.

Claim 3

The apparatus of claim 1 wherein said interference detector is further selectively operable to detect the wanted signal-component portion without detecting the at least one interfering signal component portion.

Claim 4

In a radio receiver operable to receive a receive signal, the receive signal formed of a wanted-signal component and an interfering-signal component, the wanted-signal component having a first training sequence associated therewith and the at least one interfering-signal component portion having at least a second training sequence associated therewith, the first and the at least second training sequences, respectively, selected from a set of training sequences, the first training sequence of a value known to the receiver at least when the receive signal is received at the receiver, an improvement of apparatus at least for determining the value of the at least second training sequence, said apparatus comprising: a channel estimator coupled to receive at least indications of the receive signal received at the receiver, said channel estimator for forming groups of channel estimates, the channel estimates of each group representative of characteristics of estimated channels, wherein said estimated channels are estimative of channels upon which the receive signal is transmitted to the receiver, the channel estimates of each group including estimates of channels upon which interfering signal component portions are transmitted, the interfering-signal component portions having associated therewith training sequences of the set of training sequences; a residual interference estimator coupled to receive indications of estimates formed by said channel estimator, said residual interference estimator for generating values of residual interference for each of the groups of channel estimates formed by said channel estimator; and a selector coupled to receive the values of the residual interference estimated by said residual interference estimator, said selector for selecting a group of channel estimates of the groups of channel estimates estimated by said channel estimator which exhibit a value of residual interference, estimated by said residual interference estimator, of a desired value, the training sequence associated with the group of channel estimates selected by said selector determined to be the value of the at least second training sequence.

Claim 5

In a radio receiver operable to receive a receive signal, the receive signal formed of a wanted-signal component and an interfering-signal component, the wanted-signal component having a first training sequence associated therewith and the at least one interfering-signal component portion having at least a second training sequence associated therewith, the first and the at least second training sequences, respectively, selected from a set of training sequences, the first training sequence of a value known to the receiver at least when the receive signal is received at the receiver, an improvement of apparatus at least for determining the value of the at least second training sequence, said apparatus comprising: a channel estimator coupled to receive at least indications of the receive signal received at the receiver, said channel estimator for forming groups of channel estimates, the channel estimates of each group representative of characteristics of estimated channels, wherein said estimated channels are estimative of channels upon which the receive signal is transmitted to the receiver, the channel estimates of each group including estimates of channels upon which interfering signal component portions are transmitted, the interfering-signal component portions having associated therewith training sequences of the set of training sequences; a residual interference estimator coupled to receive indications of estimates formed by said channel estimator, said residual interference estimator for generating values of residual interference for each of the groups of channel estimates formed by said channel estimator; and a selector coupled to receive the values of the residual interference estimated by said residual interference estimator, said selector for selecting a group of channel estimates of the groups of channel estimates estimated by said channel estimator which exhibit a value of residual interference, estimated by said residual interference estimator, of a desired value, the training sequence associated with the group of channel estimates selected by said selector determined to be the value of the at least second training sequence.

Claim 6

The apparatus of claim 3 wherein said channel estimator comprises a least mean square error estimator.

Claim 7

The apparatus of claim 4 wherein said least mean square estimator of which said channel estimator is formed calculates a least mean square channel estimate for an estimated-interfering signal having each training sequence of the set of training sequences but for the first training sequence associated with the wanted-signal component.

Claim 8

The apparatus of claim 3 wherein the groups of channel estimates estimated by said channel estimator comprise estimates of a wanted-signal component channel and interfering-signal component portion channels, the interfering-signal component portion channels estimative of channels upon which interfering-signal component portions having associated therewith training sequences of each training sequence of the group of training sequences but for the training sequence associated with the wanted-signal component.

Claim 9

The apparatus of claim 3 wherein said residual interference estimator estimates a value of residual interference for each of the groups of channel estimates.

Claim 10

The apparatus of claim 3 wherein said selector selects a group of channel estimates amongst the groups of the channel estimates which exhibits a lowest level of residual interference.

Claim 11

The apparatus of claim 3 further for suppressing the at least one interfering signal component portion, said apparatus further comprising: an interference suppressor coupled to receive the at least indications of the receive signal and to receive indications of the at least second training sequence associated with the group of channels selected by said select and channel estimates formed by said channel estimator, said interference suppressor for selectively suppressing the at least one interfering signal component portion.

Claim 12

The apparatus of claim 9 wherein said interference suppressor comprises a joint detector, said joint detector for jointly detecting the values of the wanted-signal component and the values of the interfering signal component portion having the second training sequence.

Claim 13

The apparatus of claim 9 wherein said channel estimator further estimates a wanted-signal estimated channel, the wanted-signal estimated channel estimative of only the channel upon which the wanted-signal component is transmitted to the receiver.

Claim 14

The apparatus of claim 11 wherein said residual interference estimator is further coupled to receive indications of the wanted-signal estimated channel, said residual interference estimator further for generating a value of residual interference for the wanted-signal estimated channel.

Claim 15

The apparatus of claim 12 wherein said selector is further coupled to receive the value of residual interference of the wanted-signal estimated channel generated by said residual interference estimator, the wanted-signal estimated channel associated therewith forming an additional group of the groups of channel estimates amongst which said selector selects.

Claim 16

The apparatus of claim 13 further for detecting values of the wanted-signal component exclusive of the interfering signal component, said apparatus further comprising: a wanted-signal detector coupled to receive the at least indications of the receive signal and to receive indications of selections by said selector selecting the wanted-signal estimated channel, said wanted-signal detector for detecting the values of the wanted-signal component.

Claim 17

The apparatus of claim 14 wherein said selector is further operable to select operation alternately of said joint detector and said wanted-signal detector.

Claim 18

The apparatus of claim 3 wherein the at least one interfering-signal component portion comprises a plurality of interfering-signal component portions and wherein the groups of channel estimates formed by said channel estimator include estimates of a plurality of channels upon which a plurality of interfering-signal component portions are transmitted.

Claim 19

In a method for receiving a receive signal at a radio receiver, the receive signal formed of a wanted-signal component portion and at least one interfering-signal component, the interfering-signal component formed of at least one interfering-signal component portion, the wanted-signal component portion having a first training sequence associated therewith and the at least one interfering-signal component portion having at least a second training sequence associated therewith, the first and second training sequences respectively, selected from a set of training sequences, the first training sequence of a value known to the receiver at least when the receive signal is received at the receiver, an improvement of a method for at least determining the value of the at least second training sequence, said method comprising the steps of: estimating groups of channel estimates responsive to indications of the receive signal received at the receiver, the channel estimates of each group representative of characteristics of estimated channels, wherein said estimated channels are estimative of channels upon which the receive signal is transmitted to the receiver, the channel estimates of each group including estimates of channels upon which interfering-signal component portions are transmitted, the interfering-signal component portions having associated therewith training sequences of the group of training sequences; generating values of residual interference for each of the groups of channel estimates estimated during said step of estimating; and selecting a group of channel estimates of the groups of channel estimates which exhibit a value of residual interference, generated during said step of generating values of residual interference of a desired value, the training sequence associated with the group of channel estimates determined to be the value of the at least second training sequence.

Claim 20

In a method for receiving a receive signal at a radio receiver, the receive signal formed of a wanted-signal component portion and at least one interfering-signal component, the interfering-signal component formed of at least one interfering-signal component portion, the wanted-signal component portion having a first training sequence associated therewith and the at least one interfering-signal component portion having at least a second training sequence associated therewith, the first and second training sequences respectively, selected from a set of training sequences, the first training sequence of a value known to the receiver at least when the receive signal is received at the receiver, an improvement of a method for at least determining the value of the at least second training sequence, said method comprising the steps of: estimating groups of channel estimates responsive to indications of the receive signal received at the receiver, the channel estimates of each group representative of characteristics of estimated channels, wherein said estimated channels are estimative of channels upon which the receive signal is transmitted to the receiver, the channel estimates of each group including estimates of channels upon which interfering-signal component portions are transmitted, the interfering-signal component portions having associated therewith training sequences of the group of training sequences; generating values of residual interference for each of the groups of channel estimates estimated during said step of estimating; and selecting a group of channel estimates of the groups of channel estimates which exhibit a value of residual interference, generated during said step of generating values of residual interference of a desired value, the training sequence associated with the group of channel estimates determined to be the value of the at least second training sequence.

Claim 21

In a radio receiver operable to receive a receive signal, the receive signal formed of a wanted-signal component and an interfering-signal component having at least one interfering-signal component portion, the wanted-signal component having a first training sequence associated therewith and the at least one interfering-signal component portion having at least a second training sequence associated therewith, the first and second training sequences respectively, selected from a group of training sequences, the first training sequence of a value known to the receiver at least when the receive signal is received at the receiver, an improvement of an apparatus for estimating a channel upon which the receive signal is transmitted to the radio receiver, said apparatus comprising: a joint detector selectably coupled to receive at least indications of the receive signal, said joint detector for jointly detecting the wanted-signal component transmitted upon a wanted-signal channel together with the at least one interfering component portion transmitted upon at least one interfering-signal channel; a wanted-signal detector selectably coupled to receive at least indications of the receive signal, said wanted signal detector for detecting the wanted-signal component transmitted upon the wanted-signal channel; and a selector for selectably coupling said joint detector and said wanted signal detector to receive the at least indications of the receive signal.

Claim 22

In a radio receiver operable to receive a receive signal, the receive signal formed of a wanted-signal component and an interfering-signal component having at least one interfering-signal component portion, the wanted-signal component having a first training sequence associated therewith and the at least one interfering-signal component portion having at least a second training sequence associated therewith, the first and second training sequences respectively, selected from a group of training sequences, the first training sequence of a value known to the receiver at least when the receive signal is received at the receiver, an improvement of an apparatus for estimating a channel upon which the receive signal is transmitted to the radio receiver, said apparatus comprising: a joint detector selectably coupled to receive at least indications of the receive signal, said joint detector for jointly detecting the wanted-signal component transmitted upon a wanted-signal channel together with the at least one interfering component portion transmitted upon at least one interfering-signal channel; a wanted-signal detector selectably coupled to receive at least indications of the receive signal, said wanted signal detector for detecting the wanted-signal component transmitted upon the wanted-signal channel; and a selector for selectably coupling said joint detector and said wanted signal detector to receive the at least indications of the receive signal.