IQ imbalance image compensation in multi-carrier wireless communication systems
First Claim
Patent Images
1. A method in a wireless communication terminal, the method comprising:
- receiving, at the terminal, an aggregated carrier including a first component carrier and a second component carrier belonging to a same base station;
determining a signal characteristic of the first component carrier and a signal characteristic of the second component carrier;
determining a level of interference from a signal received on the first component carrier to a signal on the second component carrier, belonging to the same base station, based on one of a ratio and comparison of a difference of a logarithm of the signal characteristic of the first component carrier with respect to the signal characteristic of the second component carrier; and
providing signal interference information to a serving base station when the determined interference level satisfies a condition.
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Abstract
A method in a wireless communication terminal includes receiving an aggregated carrier including a first component carrier and a second component carrier, determining a level of interference from a signal received on the first component carrier to a signal on the second component carrier based on a signal characteristic of the first component carrier and a signal characteristic of the second component carrier, and providing signal interference information to a serving base station if the determined interference level satisfies a condition.
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Citations
16 Claims
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1. A method in a wireless communication terminal, the method comprising:
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receiving, at the terminal, an aggregated carrier including a first component carrier and a second component carrier belonging to a same base station; determining a signal characteristic of the first component carrier and a signal characteristic of the second component carrier; determining a level of interference from a signal received on the first component carrier to a signal on the second component carrier, belonging to the same base station, based on one of a ratio and comparison of a difference of a logarithm of the signal characteristic of the first component carrier with respect to the signal characteristic of the second component carrier; and providing signal interference information to a serving base station when the determined interference level satisfies a condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method in a base station configured to transmit an aggregated signal that includes at least two component carriers, the method comprising:
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receiving a message from a wireless terminal being served by the base station indicating that interference from a signal transmitted on a first component carrier to a signal transmitted on the second component carrier based on one of a ratio and comparison of a difference of a logarithm of the signal characteristic of the first component carrier with respect to the signal characteristic of the second component carrier exceeds a certain level due to receiver impairment in the wireless terminal, wherein the second component carrier is a secondary cell component carrier and the first component carrier is a primary cell component carrier, wherein the first component carrier and the second component carrier belong, to the base station; and configuring a third component carrier for which an image does not fall upon the second component carrier as a new primary cell component carrier in response to receiving the message. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification