US Patent No. 9,118,362

SYSTEM FOR SELECTING TRANSMISSION MODE UNDER MULTI-INPUT MULTI-OUTPUT BASED ON SCHEDULING NUMBER AND METHOD THEREOF


Patent No. 9,118,362
Issue Date August 25, 2015
Title System For Selecting Transmission Mode Under Multi-input Multi-output Based On Scheduling Number And Method Thereof
Inventorship Xiang Chen, Kaohsiung (TW)
Jenq Neng Hwang, Kaohsiung (TW)
Hsuan Jung Su, Kaohsiung (TW)
Chung Nan Lee, Kaohsiung (TW)
Assignee NATIONAL SUN YAT-SEN UNIVERSITY, Kaohsiung (TW)

Claim of US Patent No. 9,118,362

1. A method for selecting a transmission mode under a multi-input multi-output (MIMO) architecture based on a scheduling number,
used in a base station transmitting/receiving data with a plurality of client ends through a plurality of antennas by the
MIMO architecture, comprising the steps of:
receiving a plurality of channel state information from the client ends, respectively;
determining a minimum equivalent diversity signal to noise ratio (SNR) in a spatial diversity (SD) mode corresponding to the
client ends, and determining a minimum equivalent multiplexing SNR in a spatial multiplexing (SM) mode corresponding to the
client ends, according to the channel state information;

selecting a diversity modulation coding in the SD mode according to the minimum equivalent diversity SNR, and selecting a
multiplexing modulation coding in the SM mode according to the minimum equivalent multiplexing SNR;

calculating a diversity spectral efficiency in the SD mode and a multiplexing spectral efficiency in the SM mode; and
selecting the transmission mode between the SD mode and the SM mode according to a diversity scheduling number corresponding
to the diversity modulation coding a multiplexing scheduling number corresponding to the multiplexing modulation coding, the
diversity spectral efficiency and the multiplexing spectral efficiency to transmit data from the base station in the selected
transmission mode.