Efficient method for forming and sharing impairment covariance matrix
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsDouglas A. Cairns, Yi-Pin Eric Wang, Håkan Bjorkegen
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Abstract
The technology comprises method(s) and apparatus for operating a telecommunications system. In its basic form the method comprises providing plural channelization codes for potential use by an uplink receiver; using unused channelization codes of the plural codes to generate an estimate of an impairment covariance matrix; and using the estimate of the impairment covariance matrix to form a processing parameter. For example, the processing parameter can be one or more weight values which, in turn, are can be used for generating a combined output signal.
Claims21
A method of operating a telecommunications system comprising:
- providing plural channelization codes for potential use by an uplink receiver;
- using unused codes of the plural channelization codes to generate an estimate of an impairment covariance matrix associated with an anchor uplink receiver by:
- obtaining delay values from plural uplink receivers;
- forming a superset comprising the delay values;
- associating fingers with each of the delay values in the superset;
- determining the impairment covariance matrix using unused codes over all delay values in the superset;
- obtaining from the impairment covariance matrix a first subset of the impairment covariance matrix, the first subset pertaining to the delay values for an anchor uplink receiver;
- using the first subset of the impairment covariance matrix to form a processing parameter for the anchor uplink receiver.
A method of operating a telecommunications system comprising:
- providing plural channelization codes for potential use by an uplink receiver;
- using unused codes of the plural channelization codes to generate an estimate of an impairment covariance matrix associated with an anchor uplink receiver by:
- obtaining a maximum delay value and a minimum delay value from plural uplink receivers;
- forming a grid spanning the maximum delay value and the minimum delay value across the plural users;
- forming a set of delay values comprising plural delays of the grid;
- determining the impairment covariance matrix using unused codes over the plural delay values in the grid;
- interpolating between entries of the impairment covariance matrix to create an interpolated impairment covariance matrix corresponding to the delay values for the anchor uplink receiver;
- using the interpolated impairment covariance matrix to form a processing parameter for the anchor uplink receiver.
A node of a telecommunications system which is provided with plural channelization codes, the node comprising:
- a processor which is configured to use unused codes of the plural channelization codes to generate an estimate of an impairment covariance matrix associated with an anchor uplink receiver by:
- obtaining delay values from plural uplink receivers;
- forming a superset comprising the delay values;
- associating fingers with each of the delay values in the superset;
- determining the impairment covariance matrix using unused codes over all delay values in the superset;
- obtaining from the impairment covariance matrix a first subset of the impairment covariance matrix, the first subset pertaining to the delay values for an anchor uplink receiver;
- using the first subset of the impairment covariance matrix to form a processing parameter for the anchor uplink receiver.
A node of a telecommunications system which is provided with plural channelization codes, the node comprising:
- a processor which is configured to use unused codes of the plural channelization codes to generate an estimate of an impairment covariance matrix associated with an anchor uplink receiver by:
- obtaining a maximum delay value and a minimum delay value from plural uplink receivers;
- forming a grid spanning the maximum delay value and the minimum delay value across the plural users;
- forming a set of delay values comprising plural delays of the grid;
- determining the impairment covariance matrix using unused codes over the plural delay values in the grid;
- interpolating between entries of the impairment covariance matrix to create an interpolated impairment covariance matrix corresponding to the delay values for the anchor uplink receiver;
- using the interpolated impairment covariance matrix to form a processing parameter for the anchor uplink receiver.
Dependencies are inferred from the claim text.