Quasi co-located antenna ports for channel estimation
First Claim
1. A wireless device configured to operate in a cellular communications network, comprising:
- a radio subsystem; and
a processing subsystem associated with the radio subsystem configured to;
receive, via the radio subsystem, a downlink subframe comprising a downlink control channel from the cellular communications network, a search space of the wireless device with respect to the downlink control channel comprising one or more sets of downlink control channel physical resources; and
estimate a channel for an antenna port of interest in one of the one or more sets based on an assumption by the wireless device that one or more other antenna ports in the same one of the one or more sets are quasi co-located with respect to the antenna port of interest.
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Abstract
Systems and methods are disclosed for estimating one or more channel properties of a downlink from a cellular communications network based on quasi co-located antenna ports with respect to the one or more channel properties. In one embodiment, a wireless device receives a downlink subframe including a downlink control channel from the cellular communications network. The wireless device estimates one or more large-scale channel properties for an antenna port of interest in the downlink control channel based on a subset of reference signals that correspond to antenna ports in the cellular communications network that are quasi co-located with the antenna port of interest with respect to the one or more large-scale channel properties. As a result of using the quasi co-located antenna ports, estimation of the one or more large-scale channel properties is substantially improved.
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Citations
20 Claims
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1. A wireless device configured to operate in a cellular communications network, comprising:
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a radio subsystem; and a processing subsystem associated with the radio subsystem configured to; receive, via the radio subsystem, a downlink subframe comprising a downlink control channel from the cellular communications network, a search space of the wireless device with respect to the downlink control channel comprising one or more sets of downlink control channel physical resources; and estimate a channel for an antenna port of interest in one of the one or more sets based on an assumption by the wireless device that one or more other antenna ports in the same one of the one or more sets are quasi co-located with respect to the antenna port of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operation of a wireless device in a cellular communications network, comprising:
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receiving a downlink subframe from the cellular communications network, the downlink subframe comprising a downlink control channel from the cellular communications network, a search space of the wireless device with respect to the downlink control channel comprising one or more sets of downlink control channel physical resources; and estimating a channel for an antenna port of interest in one of the one or more sets based on an assumption by the wireless device that one or more other antenna ports in the same one of the one or more sets are quasi co-located with respect to the antenna port of interest. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification