Methods and apparatus for transmit IQ mismatch calibration
AssigneeSamsung Electronics Co., Ltd.
InventorsElina Nayebi, Pranav Dayal, Kee-Bong Song
Life of this patent
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Abstract
A method of pre-compensating for transmitter in-phase (I) and quadrature (Q) mismatch (IQMM) may include sending a signal through an up-converter of a transmit path to provide an up-converted signal, determining the up-converted signal, determining one or more IQMM parameters for the transmit path based on the determined up-converted signal, and determining one or more pre-compensation parameters for the transmit path based on the one or more IQMM parameters for the transmit path. In some embodiments, the up-converted signal may be determined through a receive feedback path. In some embodiments, the up-converted signal may be determined through an envelope detector.
Claims10
A method of pre-compensating for transmitter in-phase (I) and quadrature (Q) mismatch (IQMM), the method comprising:
- sending a signal through an up-converter of a transmit path to provide an up-converted signal;
- determining the up-converted signal through a down-converter of a receive feedback path;
- determining one or more IQMM parameters for the transmit path based on the determined up-converted signal;
- and
- determining one or more pre-compensation parameters for the transmit path based on the one or more IQMM parameters for the transmit path;
- wherein the signal comprises a first signal at a first frequency, the up-converted signal comprises a first up-converted signal, and the method further comprises:
- sending a second signal at a second frequency through the up-converter of the transmit path to provide a second up-converted signal;
- determining the second up-converted signal through the down-converter of the receive feedback path;
- and
- determining the one or more IQMM parameters for the transmit path based on the determined second up-converted signal.
A method of pre-compensating for transmitter in-phase (I) and quadrature (Q) mismatch (IQMM), the method comprising:
- sending a signal through an up-converter of a transmit path to provide an up-converted signal;
- determining the up-converted signal through a down-converter of a receive feedback path;
- determining one or more IQMM parameters for the transmit path based on the determined up-converted signal;
- and
- determining one or more pre-compensation parameters for the transmit path based on the one or more IQMM parameters for the transmit path;
- the method further comprising:
- sweeping a frequency of the signal sent through the up-converter of the transmit path to provide additional up-converted signals;
- determining the additional up-converted signals through the down-converter of the receive feedback path;
- and
- determining the one or more IQMM parameters for the transmit path based on the additional determined up-converted signals.
A method of pre-compensating for transmitter in-phase (I) and quadrature (Q) mismatch (IQMM), the method comprising:
- sending a signal through an up-converter of a transmit path to provide an up-converted signal;
- determining the up-converted signal through an envelope detector;
- determining one or more IQMM parameters for the transmit path based on the determined up-converted signal;
- and
- determining one or more pre-compensation parameters for the transmit path based on the one or more IQMM parameters for the transmit path;
- wherein determining the one or more IQMM parameters for the transmit path comprises:
- applying a first pre-compensation parameter to the transmit path;
- determining a first power of a component of the up-converted signal caused by transmit IQMM through the envelope detector based on the first pre-compensation parameter;
- applying a second pre-compensation parameter to the transmit path;
- and
- determining a second power of a component of the up-converted signal caused by transmit IQMM through the envelope detector based on the second pre-compensation parameter;
- and
- wherein determining the one or more IQMM parameters for the transmit path further comprises selecting one of the first pre-compensation parameter or the second pre-compensation parameter based on a lower of the first power and the second power.
A method of pre-compensating for transmitter in-phase (I) and quadrature (Q) mismatch (IQMM), the method comprising:
- sending a signal through an up-converter of a transmit path to provide an up-converted signal;
- determining the up-converted signal through an envelope detector;
- determining one or more IQMM parameters for the transmit path based on the determined up-converted signal;
- and
- determining one or more pre-compensation parameters for the transmit path based on the one or more IQMM parameters for the transmit path;
- wherein determining the one or more IQMM parameters for the transmit path comprises:
- applying a first pre-compensation parameter to the transmit path;
- determining a first power of a component of the up-converted signal caused by transmit IQMM through the envelope detector based on the first pre-compensation parameter;
- applying a second pre-compensation parameter to the transmit path;
- and
- determining a second power of a component of the up-converted signal caused by transmit IQMM through the envelope detector based on the second pre-compensation parameter;
- the method further comprising:
- sweeping a frequency of the signal sent through the up-converter of the transmit path to provide additional up-converted signals;
- determining the additional up-converted signals through the envelope detector;
- and
- determining the one or more IQMM parameters for the transmit path based on the additional determined up-converted signals.
A method of pre-compensating for transmitter in-phase (I) and quadrature (Q) mismatch (IQMM), the method comprising:
- sending a signal through an up-converter of a transmit path to provide an up-converted signal;
- determining the up-converted signal through an envelope detector;
- determining one or more IQMM parameters for the transmit path based on the determined up-converted signal;
- and
- determining one or more pre-compensation parameters for the transmit path based on the one or more IQMM parameters for the transmit path;
- wherein the signal comprises a first signal at a first frequency, the up-converted signal comprises a first up-converted signal, and the method further comprises:
- sending a second signal at a second frequency through the up-converter of the transmit path to provide a second up-converted signal;
- determining the second up-converted signal through the envelope detector, and
- determining the one or more IQMM parameters for the transmit path based on the determined second up-converted signal.
Dependencies are inferred from the claim text.