Self-test using internal feedback for transmit signal quality estimation
AssigneeQUALCOMM Incorporated
InventorsLi GAO, Abhishek Kumar AGRAWAL, Douglas GROVER, Chalin Chac LEE, Jarir Muhammad FADLULLAH, Dongbo ZHANG, Rema VAIDYANATHAN
Life of this patent
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Abstract
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus correlates the feedback signal to a reference transmit signal to correct time misalignments between the transmit chain and the feedback loop, wherein the reference transmit signal is generated in digital domain at an input to a transmit chain and estimates a transmit signal quality value based on the correlation.
Claims16
A method for self-testing a user equipment to determine transmit signal quality based on a feedback signal sample retrieved at output of a transmit chain, comprising:
- correlating the feedback signal to a reference transmit signal to correct time misalignments between the transmit chain and the feedback loop, wherein the reference transmit signal is generated in digital domain at an input to a transmit chain;
- and
- estimating a transmit signal quality value based on the correlation.
An apparatus for self-testing a user equipment to determine transmit signal quality based on a feedback signal sample retrieved at output of a transmit chain, comprising:
- means for correlating the feedback signal to a reference transmit signal to correct time misalignments between the transmit chain and the feedback loop, wherein the reference transmit signal is generated in digital domain at an input to a transmit chain;
- and
- means for estimating a transmit signal quality value based on the correlation.
An apparatus for wireless communication, comprising:
- a memory;
- and
- at least one processor coupled to the memory and configured to:
- correlate the feedback signal to a reference transmit signal to correct time misalignments between the transmit chain and the feedback loop, wherein the reference transmit signal is generated in digital domain at an input to a transmit chain;
- and
- estimate a transmit signal quality value based on the correlation.
A computer program product, comprising:
- a computer-readable medium comprising executable code for:
- correlating the feedback signal to a reference transmit signal to correct time misalignments between the transmit chain and the feedback loop, wherein the reference transmit signal is generated in digital domain at an input to a transmit chain;
- and
- estimating a transmit signal quality value based on the correlation.
Dependencies are inferred from the claim text.