Channel estimation with effective co-channel interference suppression
AssigneeQUALCOMM Incorporated
InventorsPeter Gaal, Tao Luo, Yongbin Wei
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Abstract
A method for a wireless communication system is provided. The method includes isolating a set of pilot signals, where the pilot signals are associated with multiple base stations or multiple sectors of a single base station. This includes nulling a subset of the pilot signals to mitigate co-channel interference and to perform channel estimation in accordance with at least one of the pilot signals.
Claims26
A method, comprising:
- transforming received signals from a time domain to a frequency domain to generate a plurality of pilot signals and associated data in the frequency domain;
- nulling the associated data to isolate the plurality of pilot signals;
- converting the isolated plurality of pilot signals to the time domain;
- isolating a particular pilot signal in the time domain by zeroing each pilot signal of the isolated plurality of pilot signals except the particular pilot signal;
- and
- performing channel estimation using the particular pilot signal.
A communications apparatus comprising:
- a processor;
- and
- a memory storing instructions executable by the processor to perform operations comprising:
- transforming received signals from a time domain to a frequency domain to generate a plurality of pilot signals and associated data in the frequency domain;
- nulling the associated data to isolate the plurality of pilot signals;
- converting the isolated plurality of pilot signals to the time domain;
- isolating a particular pilot signal in the time domain by zeroing each pilot signal of the isolated plurality of pilot signals except the particular pilot signal;
- and
- performing channel estimation using the particular pilot signal.
A communications apparatus comprising:
- means for transforming received signals from a time domain to a frequency domain to generate a plurality of pilot signals and associated data in the frequency domain;
- means for nulling the associated data to isolate the plurality of pilot signals;
- means for converting the isolated plurality of pilot signals to the time domain;
- means for isolating a particular pilot signal in the time domain by zeroing each pilot signal of the isolated plurality of pilot signals except the particular pilot signal;
- means for generating a channel estimate using the particular pilot signal;
- and
- means for transforming the channel estimate to the frequency domain for frequency domain processing.
The apparatus 16, wherein each pilot signal of the plurality of pilot signals is associated with a different base station of multiple base stations.
A non-transitory computer-readable medium comprising instructions that, when executed by a processor, cause the processor to,
- null data channels associated with orthogonal base stations or sectors to isolate a plurality of pilot tones
- isolate a single pilot tone from among the plurality of isolated pilot tones in a time domain by zeroing each pilot tone of the isolated plurality of pilot tones except the single pilot tone, wherein a subset of the isolated plurality of pilot tones is associated with a first transmission source and a second transmission source, and wherein the single pilot tone is associated with a third transmission source;
- and
- perform a channel estimation using the single pilot tone.
An apparatus comprising:
- a processor;
- and
- a memory storing instructions executable by the processor to perform operations comprising:
- nulling data channels associated with orthogonal base stations or sectors to isolate a plurality of pilot signals;
- isolating a particular pilot signal of the isolated plurality of pilot signals in a time domain by zeroing each pilot signal of the isolated plurality of pilot signals except the particular pilot signal;
- performing channel estimation using the the particular pilot signal.
Dependencies are inferred from the claim text.