Method and apparatus for interference cancellation by a user equipment using blind detection
First Claim
1. A method of wireless communication at a user equipment (UE), comprising:
- receiving a signal, the received signal comprising at least a first signal and a second signal, the first signal and the second signal originating from a same cell;
blindly estimating parameters associated with decoding the second signal, the blind estimation including blindly determining a transmission technique of the second cell signal based at least in part on blindly determining whether the second signal is based on a cell specific reference signal (CRS) and whether the second signal is based on a UE specific reference signal (UE-RS); and
processing the received signal based on the blindly estimated parameters.
1 Assignment
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Accused Products
Abstract
In order to cancel any interference due to the second signal (e.g., from a non-serving cell) from a signal received at a UE, without receiving additional control information, the UE blindly estimates parameters associated with decoding the second signal. This may include determining a metric based on sets of symbols associated with the signals in order to determine parameters for the second signal, e.g., the transmission mode, modulation format, and/or spatial scheme of the second signal. The parameters for the signal may be determined based on a comparison of the metric with a threshold. When a spatial scheme and a modulation format is unknown, the blind estimation may include determining a plurality of constellations of possible transmitted modulated symbols associated with a potential spatial scheme and modulation format combination. Interference cancellation can be performed using the constellations and a corresponding probability weight.
71 Citations
28 Claims
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1. A method of wireless communication at a user equipment (UE), comprising:
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receiving a signal, the received signal comprising at least a first signal and a second signal, the first signal and the second signal originating from a same cell; blindly estimating parameters associated with decoding the second signal, the blind estimation including blindly determining a transmission technique of the second cell signal based at least in part on blindly determining whether the second signal is based on a cell specific reference signal (CRS) and whether the second signal is based on a UE specific reference signal (UE-RS); and processing the received signal based on the blindly estimated parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for wireless communication, comprising:
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means for receiving a signal, the received signal comprising at least a first signal and a second signal, the first signal and the second signal originating from a same cell; means for blindly estimating parameters associated with decoding the second signal, wherein blindly estimating the parameters comprises blindly determining a transmission technique of the second cell signal based at least in part on blindly determining whether the second signal is based on a cell specific reference signal (CRS) and whether the second signal is based on a UE specific reference signal (UE-RS); and means for processing the received signal based on the blindly estimated parameters. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A non-transitory computer-readable medium storing computer executable code for:
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receiving a signal, the received signal comprising at least a first signal and a second signal, the first signal and the second signal originating from a same cell; blindly estimating parameters associated with decoding the second signal, wherein blindly estimating the parameters comprises blindly determining a transmission technique of the second signal based at least in part on determining whether the second signal is based on blindly determining whether the second signal is based on a cell specific reference signal (CRS) and whether the second signal is based on a UE specific reference signal (UE-RS); and processing the received signal based on the blindly estimated parameters. - View Dependent Claims (26)
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27. An apparatus for wireless communication, comprising:
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a memory; and at least one processor coupled to the memory and configured to; receive a signal, the received signal comprising at least a first signal and a second signal, the first signal and the second signal originating from a same cell; blindly estimate parameters associated with decoding the second signal, wherein blindly estimating the parameters comprises blindly determining a transmission technique of the second signal based at least in part on determining whether the second signal is based on blindly determining whether the second signal is based on a cell specific reference signal (CRS) and whether the second signal is based on a UE specific reference signal (UE-RS); and process the received signal based on the blindly estimated parameters. - View Dependent Claims (28)
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Specification