Interference cancellation in wireless relaying networks
First Claim
1. A method for detecting signal information in a wireless relaying network, said method comprising the steps of:
- a first network node storing, as a priori known signal information, previously received signal information representative of a first set of information including at least one data unit to be transmitted in total more than one time over at least one link;
said first network node subsequently receiving signal information representative of a second set of information, wherein a transmission of said at least one data unit by a second network node interferes with the reception of said second set of information; and
said first network node detecting at least part of said second set of information by interference cancellation based on the received signal information representative of said second set of information and at least part of said previously stored a priori known signal information,wherein said step of said first network node detecting at least part of said second set of information includes the step of processing a set {tilde over (D)}Σ
representative of previously detected data packets and the received signal information Ri according to;
{tilde over (D)}=ƒ
(Ri,{tilde over (D)}Σ
),where ƒ
is a predetermined objective function and {tilde over (D)} is the resulting set of detected data packets.
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Abstract
In accordance with the invention, signal information representative of a first set of information to be transmitted more than one time over at least one link is stored as a priori known signal information. This could be previously received and/or, detected information, own transmitted information or otherwise available relevant signal information in the node. Signal information representative of a second set of information is received, wherein a transmission of the first set of information interferes with the reception of the second set of information. In spite of the interference, at least part of the second set of information can still be successfully be detected by exploiting the received signal information and at least part of the previously stored a priori known signal information. The information is detected by interference cancellation based on the received signal information and relevant parts of the a priori known information. The set of priori known signal information is preferably updated by continuously storing newly detected information.
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Citations
35 Claims
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1. A method for detecting signal information in a wireless relaying network, said method comprising the steps of:
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a first network node storing, as a priori known signal information, previously received signal information representative of a first set of information including at least one data unit to be transmitted in total more than one time over at least one link; said first network node subsequently receiving signal information representative of a second set of information, wherein a transmission of said at least one data unit by a second network node interferes with the reception of said second set of information; and said first network node detecting at least part of said second set of information by interference cancellation based on the received signal information representative of said second set of information and at least part of said previously stored a priori known signal information, wherein said step of said first network node detecting at least part of said second set of information includes the step of processing a set {tilde over (D)}Σ
representative of previously detected data packets and the received signal information Ri according to;
{tilde over (D)}=ƒ
(Ri,{tilde over (D)}Σ
),where ƒ
is a predetermined objective function and {tilde over (D)} is the resulting set of detected data packets.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An arrangement for detecting signal information in a wireless relaying network, said arrangement comprising:
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means arranged in a first network node for storing, as a priori known signal information, previously received signal information representative of a first set of information, including at least one data unit to be transmitted more than one time over at least one link; means arranged in said first network node for receiving signal information representative of a second set of information, wherein a transmission of said at least one data unit by a second network node interferes with the reception of said second set of information; and means arranged in said first network node for detecting at least part of said second set of information by interference cancellation based on the received signal information representative of said second set of information and at least part of said previously stored a priori known signal information, wherein said means for detecting at least part of said second set of information includes means for processing a set {tilde over (D)}Σ
representative of previously detected data packets and the received signal information Ri according to;
{tilde over (D)}=ƒ
(Ri,{tilde over (D)}Σ
),where θ
is a predetermined objective function and {tilde over (D)} is the resulting set of detected data packets.- View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. Apparatus for detecting signal information in a wireless relaying network, comprising:
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memory arranged in a first network node for storing, as known signal information, previously received signal information representative of a first set of information including at least one data unit to be transmitted more than one time over a link; a receiver arranged in the first network node for receiving signal information representative of a second set of information, wherein a transmission of the one data unit by a second network node interferes with the reception of the second set of information; and a detector arranged in the first network node for detecting at least part of the second set of information by interference cancellation based on the received signal information representative of the second set of information and at least part of the stored known signal information, wherein the detector includes a data processor for processing a set {tilde over (D)}Σ
representative of previously detected data packets and the received signal information Ri according to;
{tilde over (D)}=ƒ
(Ri,{tilde over (D)}Σ
),where ƒ
is a predetermined objective function and {tilde over (D)} is the resulting set of detected data packets.- View Dependent Claims (31, 32, 33, 34, 35)
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Specification