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US 8,995,592 B2Granted
Signaling to support advanced wireless receivers and related devices and methods
AssigneeFuturewei Technologies, Inc.
InventorsNgoc Dung Dao, Aaron Callard, Mohammadhadi Baligh, Hang Zhang, Ho Ting Cheng
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Abstract
Various devices and methods are provided that use signaling to support advanced wireless receivers. For example, a method includes receiving an input signal at a user equipment. The input signal includes a desired signal and an interfering signal, where the desired signal defines symbols using constellations. The method also includes obtaining information identifying a wireless channel used by the interfering signal and a modulation type used to modulate data in the interfering signal. The method further includes recovering the symbols from the desired signal using the information.
Claims18
An apparatus comprising:
- at least one receiver configured to receive an input signal, the input signal comprising a desired signal transmitted from a base station and an interfering signal, the desired signal defining symbols using constellations and the interfering signal defining symbols using constellations;
- and
- at least one processing unit configured to:
- receive a Precoding Matrix Indicator (PMI) or a predefined demodulation reference signal (DMRS) sequence of the interfering signal, the PMI or DMRS being transmitted by the base station, and
- blindly determine additional information including a type of symbol used in the interfering signal, wherein parameters associated with the additional information are stored in a memory coupled to the processing unit prior to receipt of the input signal, and
- jointly decode the symbols in the desired signal and the interfering signal using only the PMI or DMRS, and the additional information.
3 more elements
A method comprising:
- receiving an input signal at a user equipment, the input signal comprising a desired signal transmitted from a base station and an interfering signal, the desired signal defining symbols using constellations;
- receiving, at the user equipment, a Precoding Matrix Indicator (PMI) or a predefined demodulation reference signal (DMRS) sequence of the interfering signal, the PMI or DMRS being transmitted by the base station;
- blindly determining, by the user equipment, additional information including a modulation type used to modulate data in the interfering signal, wherein parameters that enable the user equipment to determine the modulation type are stored in a memory in the user equipment prior to receipt of the input signal;
- removing, at the user equipment, at least a portion of the interfering signal from the input signal using only the PMI or DMRS, and the additional information to generate a modified input signal, wherein said removing comprises:
- calculating a receiver value to decode the interfering signal,
- calculating an estimated symbol using the receiver value, and
- subtracting a scaled version of the estimated symbol from the input signal to generate the modified input signal;
- and
- recovering the symbols from the modified input signal.
6 more elements
An apparatus comprising:
- at least one receiver configured to receive an input signal, the input signal comprising a desired signal transmitted from a base station and an interfering signal, the desired signal defining symbols using constellations;
- and
- at least one processing unit configured to:
- receive a Precoding Matrix Indicator (PMI) or a predefined demodulation reference signal (DMRS) sequence of the interfering signal, the PMI or DMRS being transmitted by the base station,
- blindly determine additional information including a type of symbol used in the interfering signal, wherein parameters associated with the additional information are stored in a memory coupled to the processing unit prior to receipt of the input signal, and
- remove at least a portion of the interfering signal from the input signal using only the PMI or DMRS, and the additional information to generate a modified input signal, wherein to remove comprises:
- calculate a receiver value to decode the interfering signal,
- calculate an estimated symbol using the receiver value, and
- subtract a scaled version of the estimated symbol from the input signal to generate the modified input signal, and
- recover the symbols from the modified input signal.
7 more elements
Dependencies are inferred from the claim text.