Multi-user downlink linear MIMO precoding systems

Details Multi-user downlink linear MIMO precoding systems Multi-user downlink linear MIMO precoding systems

2007-12-19

2011-11-15

Flores, Leon (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S267000, C375S299000, C375S347000, C455S101000, C455S132000, C455S296000, C455S500000, C370S334000

Reexamination Certificate

active

08059733

ABSTRACT:
Multi-user (MU-) MIMO systems with quantized feedback are designed to maximize the sum-rate via scheduling and linear precoding. To maximize throughput over the network, quantized CSIT is sent through a low-rate feedback link feedback from a plurality of users back to a base station. The base station then determines a subset of the plurality of users to transmit one or more signals to based on the received feedback and determines a preceding matrix based on the received feedback from the plurality of users wherein the precoding matrix maximizes a sum-rate throughput for the subset of the plurality of users. Additionally, based on the received feedback, the base station designs a quantization codebook. This codebook may be designed off-line and/or online. The codebook and/or precoding matrix are used to transmit signals to the users.

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