Methods and apparatus for generation and use of reference signals in a communications system
AssigneeQUALCOMM Incorporated
InventorsJuan Montojo, Amir Farajidana, Alexei Y. Goroknov, Kapil Bhattad, Ravi Palanki
Life of this patent
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Abstract
Apparatus and methods for generation and use of reference signals in a wireless communications system are described. A group-specific reference signal pattern may be generated for provision to a group of UEs or terminals in communication with an eNodeB or base station. The reference signal may be generated based on system parameters. Reference signals may be generated to span multiple contiguous physical resource blocks.
Claims91
A method for transmitting reference signals in a communications system, the method comprising:
- transmitting a first reference signal specific to a first group of user devices;
- and
- transmitting a common reference signal to a second group of user devices, wherein the second group of user devices includes the first group of user devices.
An apparatus for use in a communications system, the apparatus comprising:
- a reference signal selection module configured to select a first reference signal specific to a first group of user devices and a common reference signal specific to a second group of user devices, wherein the second group of user devices includes the first group of user devices;
- and
- a transmit module configured to transmit the first reference signal and the common reference signal.
A method for signal reception in a communications system, the method comprising:
- receiving, at a user device, a first reference signal specific to a group of user devices;
- receiving, at the user device, a second reference signal specific to the user device;
- and
- deriving a channel estimate based on at least the first reference signal and the second reference signal.
An apparatus for use in a communications system, the apparatus comprising:
- a receiver module configured to receive a first reference signal specific to a group of user devices and a second reference signal specific to a user device;
- and
- a channel estimation module configured to derive a channel estimate based on at least the first reference signal and the second reference signal.
A computer program product comprising a computer-readable medium including codes for causing a computer to:
- transmit a first reference signal specific to a first group of user devices;
- and
- transmit a common reference signal to a second group of user devices, wherein the second group of user devices includes the first group of user devices.
An apparatus for use in a communications system, the apparatus comprising:
- means for selecting a first reference signal specific to a first group of user devices and a common reference signal specific to a second group of user devices, wherein the second group of user devices includes the first group of user devices;
- and
- means for transmitting the first reference signal and the common reference signal.
A computer program product comprising a computer-readable medium including codes for causing a computer to:
- receive, at a user device, a first reference signal specific to a group of user devices;
- receive, at the user device, a second reference signal specific to the user device;
- and
- derive a channel estimate based on at least the first reference signal and the second reference signal.
An apparatus for use in a communications system, the apparatus comprising:
- means for receiving a first reference signal specific to a group of user devices and a second reference signal specific to a user device;
- and
- means for deriving a channel estimate based on at least the first reference signal and the second reference signal.
Dependencies are inferred from the claim text.