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;
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 based on the signal characteristic of the first component carrier and the signal characteristic of the second component carrier;
determining whether modulation coding scheme scheduled on the second component carrier is subject to a specified level of interference from the first component carrier based on determining that the modulation coding scheme scheduled on the second component carrier is within a pre-determined range; and
providing signal interference information to a serving base station only when the determined interference level exceeds a predetermined value and when the modulation coding scheme scheduled on the second component carrier is subject to the specified level of interference.
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Accused Products
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
11 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; 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 based on the signal characteristic of the first component carrier and the signal characteristic of the second component carrier; determining whether modulation coding scheme scheduled on the second component carrier is subject to a specified level of interference from the first component carrier based on determining that the modulation coding scheme scheduled on the second component carrier is within a pre-determined range; and providing signal interference information to a serving base station only when the determined interference level exceeds a predetermined value and when the modulation coding scheme scheduled on the second component carrier is subject to the specified level of interference. - View Dependent Claims (2, 3, 4, 5)
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6. 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 an interference from a signal transmitted on a first component carrier to a signal transmitted on 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 wireless terminal determining whether modulation coding scheme scheduled on the second component carrier is subject to a specified level of interference from the first component carrier based on determining that the modulation coding scheme scheduled on the second component carrier is within a pre-determined range; wherein the wireless terminal transmitting the message indicating the interference to the base station only when the interference from the signal transmitted on the first component carrier to the signal transmitted on the second component carrier exceeds said certain level and when the modulation coding scheme scheduled on the second component carrier is subject to the specified level of interference; and configuring a third component carrier as a new primary cell component carrier in response to receiving the message. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification