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US 8,553,524 B2Granted
Signal reception apparatus, systems, and methods
AssigneeIntel Corporation
InventorsQinghua Li, Xintian E. Lin
Life of this patent
Estimating the term…
Abstract
An apparatus and a system, as well as a method and article, may operate to separate, in the frequency domain, a combined plurality of asynchronous data streams received at substantially the same time into a separated plurality of data streams, converting to the time domain for detection, synchronizing, and decoding.
Claims20
A method comprising:
- computing, by a wireless access point, a channel matrix that is representative of a channel response for each of a plurality of channels, said computing based at least in part on training signals received over two or more antennas from multiple stations;
- receiving from multiple stations, at the wireless access point, a plurality of uplinked spatial division multiple access (SDMA) data streams that are out of synchronism;
- converting the plurality of SDMA data streams from a first time domain to a frequency domain;
- separating, with a spatial demapper, the plurality of SDMA data streams in the frequency domain into a separated plurality of data streams in the frequency domain based at least in part on the channel matrix;
- converting the separated plurality of data streams from the frequency domain to a second time domain;
- and
- synchronizing the separated plurality of data streams in the second time domain.
4 more elements
A non-transitory storage medium having instructions that, when executed, cause an apparatus to:
- compute a channel response for each of a plurality of channels based on training signals received over two or more antennas from multiple stations, the computed channel response to include at least a channel matrix;
- convert a plurality of spatial division multiple access (SDMA) data streams from a first time domain to a frequency domain after the plurality of SDMA data streams have been received as a plurality of uplinked SDMA data streams that are out of synchronism;
- separate the plurality of SDMA data streams in the frequency domain into a separated plurality of data streams in the frequency domain based on the channel matrix;
- convert the separated plurality of data streams from the frequency domain to a second time domain;
- and
- synchronizing the separated plurality of data streams in the second time domain.
3 more elements
An apparatus, including:
- a separation module to separate a plurality of spatial division multiple access (SDMA) data streams into a plurality of separated data streams, in a frequency domain, after the plurality of SDMA data streams have been converted from a first time domain to the frequency domain, wherein the separation module is configured to separate the plurality of SDMA data streams in the frequency domain based at least in part on a channel matrix, and wherein the plurality of SDMA data streams have been received as a plurality of uplinked SDMA data streams that are out of synchronism;
- and
- a synchronization module to synchronize the separated plurality of data streams in a second time domain after the separated plurality of data streams have been converted from the frequency domain to the second time domain.
A system, comprising:
- a separation module to separate a plurality of spatial division multiple access (SDMA) data streams into a plurality of separated data streams, in a frequency domain, after the plurality of SDMA data streams have been converted from a first time domain to the frequency domain, wherein the separation module is configured to separate the plurality of SDMA data streams in the frequency domain based at least in part on a channel matrix, and wherein the plurality of SDMA data streams have been received as a plurality of uplinked SDMA data streams that are out of synchronism;
- a synchronization module to synchronize the separated plurality of data streams in a second time domain after the separated plurality of data streams have been converted from the frequency domain to the second time domain;
- and
- a wireless access point coupled to a plurality of antennas to receive the plurality of SDMA data streams.
1 more element
Dependencies are inferred from the claim text.