Technique for automatic gain control in a multi-carrier communication system
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsPeter Alriksson, Joakim Axmon
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Abstract
A technique for performing Automatic Gain Control (AGC) in a multi-carrier communication system in which transmission gaps are scheduled on a serving carrier to enable temporary tuning to another carrier by a served device is described. A method embodiment of this technique comprises: performing a first AGC procedure in relation to a first signal received on a first carrier during a first transmission gap; determining an AGC configuration for a second procedure based on at least one of channel conditions in relation to the first carrier and a lapsed time since the first transmission gap; and determining if the second AGC procedure can be skipped.
Claims32
A method of performing Automatic Gain Control (AGC) in a multi-carrier communication system in which transmission gaps are scheduled on a serving carrier to enable temporary tuning to another carrier by a served device, the method comprising the following steps performed by the served device:
- performing a first AGC procedure in relation to a first signal received on a first carrier during a first transmission gap, wherein the first AGC procedure delivers a first gain value;
- determining an AGC configuration for a second AGC procedure based on channel conditions in relation to the first carrier or based on a lapsed time since the first transmission gap, or both, the determination comprising selecting a specific AGC algorithm or a specific AGC parameter or a specific AGC parameter set;
- and
- performing the second AGC procedure in relation to a second signal received on the first carrier during a second transmission gap, wherein the second AGC procedure is based on the AGC configuration using the first gain value as a starting point.
A method of performing Automatic Gain Control (AGC) in a multi-carrier communication system in which transmission gaps are scheduled on a serving carrier to enable temporary tuning to another carrier by a served device, the method comprising the following steps performed by the served device:
- performing a first AGC procedure in relation to a first signal received on a first carrier during a first transmission gap, wherein the first AGC procedure delivers a first gain value;
- determining that a second AGC procedure in relation to a second signal received on the first carrier during a second transmission gap can be skipped, wherein the determination is based on channel conditions in relation to the first carrier and/or a lapsed time since the first transmission gap;
- and
- skipping the second AGC procedure using the first gain value for the second signal.
An apparatus for performing Automatic Gain Control, or AGC, in a multi-carrier communication system in which transmission gaps are scheduled on a serving carrier to enable temporary tuning to another carrier by a served device,
- the apparatus comprising:
- an AGC component configured to perform an AGC procedure;
- and
- a selector coupled to the AGC component and configured to determine an AGC configuration for the AGC procedure, the determination comprising selecting a specific AGC algorithm or a specific AGC parameter or a specific AGC parameter set;
- wherein the AGC component is further configured
- to perform a first AGC procedure in relation to a first signal received on a first carrier during a first transmission gap, wherein the first AGC procedure delivers a first gain value;
- and
- to perform a second AGC procedure in relation to a second signal received on the first carrier during a second transmission gap, wherein the second AGC procedure uses the first gain value as a starting point and is based on an AGC configuration determined by the selector based on channel conditions in relation to the first carrier or based on a lapsed time since the first transmission gap, or both.
An apparatus for performing Automatic Gain Control, or AGC, in a multi-carrier communication system in which transmission gaps are scheduled on a serving carrier to enable temporary tuning to another carrier by a served device,
- the apparatus comprising:
- an AGC component configured to perform an AGC procedure;
- and
- a determinator coupled to the AGC component and configured to determine that an AGC procedure can be skipped based on channel conditions in relation to the first carrier or based on a lapsed time since the first transmission gap, or both;
- wherein the AGC component is further configured
- to perform a first AGC procedure in relation to a first signal received on a first carrier during a first transmission gap, wherein the first AGC procedure delivers a first gain value;
- and
- to skip, under control of the determinator, a second AGC procedure in relation to a second signal received on the first carrier during a second transmission gap;
- and
- wherein the apparatus is configured to use the first gain value for the second signal.
Dependencies are inferred from the claim text.