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US 8,428,159 B2Granted
MIMO receiver using maximum likelihood detector in combination with QR decomposition
AssigneeQUALCOMM Incorporated
InventorsGeert A. Atwater, Brian Wong
Life of this patent
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AssigneeQUALCOMM Incorporated
InventorsGeert A. Atwater, Brian Wong
Estimating the term…
A MIMO receiver is provided with a preprocessor for performing QR decomposition of a channel matrix H wherein the factored reduced matrix R is used in place of H and Q*y is used in place of the received vector y in a maximum likelihood detector (“MLD”). The maximum likelihood detector might be a hard-decision MLD or a soft-decision MLD. A savings of computational complexity can be used to provide comparable results more quickly, using less circuitry, and/or requiring less consumed energy, or performance can be improved for a fixed amount of time, circuitry and/or energy. Where the MLD uses approximations, such as finite resolution calculations (fixed point or the like) or L1 Norm approximations, the reduced number of operations resulting from using the reduced matrix results in improved approximations as a result of the finite resolution operations. Other methods of reducing the channel matrix might be used for suitable and/or cumulative advantages.
A wireless receiver that receives a signal from a wireless multiple-input, multiple-output (MIMO) channel and detects from the received signal a maximum likelihood for a corresponding transmitted signal, the wireless receiver comprising:
In a wireless receiver that receives a signal from a wireless multiple-input, multiple-output (MIMO) channel and detects from the received signal a maximum likelihood for a corresponding transmitted signal based on operations performed by the wireless receiver, a method of reducing an average number of operations per received symbol comprising:
Dependencies are inferred from the claim text.