Quasi co-located antenna ports for channel estimation
An antenna port, quasi-colocation technology, used in channel estimation, transmission path sub-channel allocation, wireless communication, etc.
Active Publication Date: 2015-06-03
TELEFON AB LM ERICSSON (PUBL)
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However, advanced network architectures (e.g., heterogeneous network architectures) and downlink CoMP lead to issues that must be addressed
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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.
Description
related application This application claims the benefit of Provisional Patent Application Serial No. 61 / 679,335, filed August 3, 2012, the disclosure of which is hereby incorporated by reference in its entirety. technical field The present disclosure relates to quasi-colocated antenna ports in cellular communication networks that can be used to estimate large-scale or long-term channel properties. Background technique The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) uses Orthogonal Frequency Division Multiplexing (OFDM) in the downlink and uses Discrete Fourier Transform (DFT) to spread OFDM in the uplink. The underlying LTE physical resources can thus be viewed as a time-frequency grid as illustrated in Fig. 1, where each resource element (RE) corresponds to one subcarrier on a particular antenna port during one OFDM symbol interval. The antenna ports are defined such that the channel on which a symbol on an antenna port is delivered can be inferr...
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IPC IPC(8): H04L5/00H04L25/02
CPCH04L5/0023H04L5/0035H04L5/0048H04L5/0091H04L25/0204H04W72/23H04W84/042
Inventor M.弗伦内E.埃里克松S.索伦蒂诺
Owner TELEFON AB LM ERICSSON (PUBL)