METHOD AND APPARATUS FOR PERIODIC SOUNDING REFERENCE SIGNAL TRANSMISSION FROM MULTIPLE ANTENNAS IN A WIRELESS COMMUNICATION SYSTEM
First Claim
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1. A method for transmitting sounding reference signals from a user equipment having a plurality of antennas, the method comprising:
- transmitting a first sounding reference signal from one of the plurality of antennas, wherein transmitting the first sounding reference signal repeats at a first period; and
transmitting a second sounding reference signal from at least two of the plurality of antennas, wherein transmitting the second sounding reference signal repeats at a second period.
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Abstract
A method for transmitting sounding reference signals from a user equipment having multiple antennas is disclosed. The user equipment may concurrently send two periodic sounding reference signals. A first sounding reference signal is sent from a single antenna. A second sounding reference signal is sent from multiple antennas. Transmission of the sounding reference signal from multiple antennas is triggered when the user equipment receives activation signal from the network.
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Citations
20 Claims
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1. A method for transmitting sounding reference signals from a user equipment having a plurality of antennas, the method comprising:
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transmitting a first sounding reference signal from one of the plurality of antennas, wherein transmitting the first sounding reference signal repeats at a first period; and transmitting a second sounding reference signal from at least two of the plurality of antennas, wherein transmitting the second sounding reference signal repeats at a second period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless communication device comprising:
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a plurality of transmitters configured to supply radio-frequency signals; a plurality of antennas configured to receive the radio-frequency signals from the plurality of transmitters; a processor configured to execute a program; and a memory coupled to the processor for storing the program, wherein the program instructs the processor to; command transmission of a first sounding reference signal from one of the plurality of antennas, wherein transmitting the first sounding reference signal repeats at a first period; and command transmission of a second sounding reference signal from at least two of the plurality of antennas, wherein transmitting the second sounding reference signal repeats at a second period. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for transmitting sounding reference signals from a user equipment having a plurality of antennas, the method comprising:
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receiving downstream channel information having a DCI format; and transmitting a sounding reference signal when triggered by the DCI format, wherein the DCI format has an associated transmission time interval and the sounding reference signal is transmitted in the associated transmission time interval. - View Dependent Claims (17, 18, 19, 20)
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Specification