Techniques for channel estimation
AssigneeQUALCOMM Incorporated
InventorsSeyedkianoush Hosseini, Wanshi Chen, Peter Gaal
Life of this patent
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Abstract
Techniques are described herein for performing channel estimation for both uplink and downlink channels. Additional reference signals may be allocated or assigned to various resource elements (REs) of a transmission time interval (TTI). The receiving device (e.g., a base station or a user equipment (UE)) may be configured to use the additional reference signals during channel estimation. The use of additional reference signals may improve the accuracy of the channel estimations. In downlink communications, a base station may allocate one or more channel state information reference signals (CSI-RSs) to a port of a UE. In uplink communications, a UE may transmit several sounding reference signals (SRSs) in a group.
Claims19
A method for wireless communication, comprising:
- identifying a level of accuracy for a channel estimation to be performed by a base station, the channel estimation associated with at least one communication with the base station;
- determining a quantity of sounding reference signals (SRSs) for transmitting during a transmission time interval (TTI) based at least in part on the level of accuracy for the channel estimation;
- assigning a plurality of symbols within a repetition window of the TTI, wherein the repetition window indicates a number of symbols used for transmitting the quantity of SRSs, and wherein assigning the plurality of symbols is based at least in part on determining the quantity of SRSs and on the level of accuracy for the channel estimation;
- and
- transmitting the quantity of SRSs in the TTI based at least in part on assigning the plurality of symbols.
A method for wireless communication, comprising:
- identifying a level of accuracy for a channel estimation to be performed by a base station, the channel estimation associated with at least one communication with a user equipment (UE);
- receiving, by the base station, a quantity of sounding reference signals (SRSs) from the UE during a transmission time interval (TTI) based at least in part on the level of accuracy for the channel estimation;
- receiving the quantity of SRSs via a plurality of symbols within a repetition window of the TTI, wherein the repetition window indicates a number of symbols used for receiving the quantity of SRSs, and wherein the plurality of symbols is based at least in part on the level of accuracy for the channel estimation;
- performing the channel estimation based at least in part on receiving the quantity of SRSs from the UE;
- and
- allocating resources to the UE based at least in part on performing the channel estimation.
An apparatus for wireless communication, comprising:
- one or more memories storing processor-executable code;
- and
- one or more processors coupled with the one or more memories and operable to execute the code to cause the apparatus to:
- identify a level of accuracy for a channel estimation to be performed by a base station, the channel estimation associated with at least one communication with the base station;
- determine a quantity of sounding reference signals (SRSs) for transmitting during a transmission time interval (TTI) based at least in part on the level of accuracy for the channel estimation;
- assign a plurality of symbols within a repetition window of the TTI, wherein the repetition window indicates a number of symbols used for transmitting the quantity of SRSs, and wherein assigning the plurality of symbols is based at least in part on determining the quantity of SRSs and on the level of accuracy for the channel estimation;
- and
- transmit the quantity of SRSs in the TTI based at least in part on assigning the plurality of symbols.
Dependencies are inferred from the claim text.