INTERFERENCE CANCELLATION FOR WIRELESS COMMUNICATIONS
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Accused Products
Abstract
Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users'"'"' signals to improve the probability of decoding a given user'"'"'s frames, as well as techniques for traffic channel demodulation using channel re-estimation.
24 Citations
32 Claims
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1-4. -4. (canceled)
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5. A method for processing a power control command for an access terminal in soft handoff, the method comprising:
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receiving power control commands from each base station of a plurality of base stations communicating with the access terminal in soft handoff, wherein each power control command corresponds to a first power control group in a frame of multiple power control groups; and decreasing a transmit power of the access terminal in response to at least one of the power control commands instructing the access terminal to decrease the transmit power. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. An apparatus for processing a power control command for an access terminal in soft handoff, the apparatus comprising:
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a receiver for receiving power control commands from each base station of a plurality of base stations communicating with the access terminal in soft handoff, wherein each power control command corresponds to a first power control group in a frame of multiple power control groups; and a power control module for decreasing a transmit power of the access terminal in response to at least one of the power control commands instructing the access terminal to decrease the transmit power. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. An apparatus for processing a power control command for an access terminal in soft handoff, the apparatus comprising:
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means for receiving power control commands from each base station of a plurality of base stations communicating with the access terminal in soft handoff, wherein each power control command corresponds to a first power control group in a frame of multiple power control groups; and means for decreasing a transmit power of the access terminal in response to at least one of the power control commands instructing the access terminal to decrease the transmit power. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A non-transitory computer readable medium for processing a power control command for an access terminal in soft handoff, the non-transitory computer readable medium comprising operational instructions that, when executed by a processor, cause the processor to perform operations including:
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receiving power control commands from each base station of a plurality of base stations communicating with the access terminal in soft handoff, wherein each power control command corresponds to a first power control group in a frame of multiple power control groups; and decreasing a transmit power of the access terminal in response to at least one of the power control commands instructing the access terminal to decrease the transmit power. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification