Multiple-input multiple-output (MIMO) transmission with...

Details Multiple-input multiple-output (MIMO) transmission with... Multiple-input multiple-output (MIMO) transmission with...

2011-08-09

2011-08-09

Torres, Juan A (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

07995671

ABSTRACT:
Techniques for performing rank-dependent precoding for a multiple-input multiple-output (MIMO) transmission are described. Each rank may be associated with a set of at least one precoding vector or matrix that can provide good performance for that rank. A transmitter may obtain a precoding vector for a rank-1 transmission from a first set containing at least one column vector of a unitary matrix, e.g., a Fourier matrix. The transmitter may perform precoding for the rank-1 transmission based on the precoding vector. The transmitter may obtain a precoding matrix for a rank-2 transmission from a second set containing an identity matrix. The transmitter may perform precoding for the rank-2 transmission based on the precoding matrix. For the rank-2 transmission, the transmitter may select the identity matrix as the precoding matrix if a MIMO channel resembles a diagonal channel (which may be determined based on antenna configurations) and may select the unitary matrix otherwise.

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Written Opinion, PCT/US08/053512, International Search Authority, European Patent Office, Oct. 29, 2008.

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