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1. (WO2018084989) UPLINK MIMO DESIGN

Pub. No.:    WO/2018/084989    International Application No.:    PCT/US2017/055374
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Fri Oct 06 01:59:59 CEST 2017
IPC: H04B 7/0417
H04B 7/0452
H04B 7/0456
H04B 7/06
Applicants: QUALCOMM INCORPORATED
Inventors: WANG, Renqiu
ZENG, Wei
ZHANG, Xiaoxia
XU, Hao
Title: UPLINK MIMO DESIGN
Abstract:
Aspects of the disclosure relate to multiple-input multiple-output (MIMO) signals, and the determination of a precoding matrix for configuring the MIMO signals. An uplink traffic channel may be configured utilizing orthogonal frequency division multiplexing (OFDM) waveform. Determination of the precoding matrix may be based at least in part on an estimate of the uplink carrier, where the uplink carrier estimate is based at least in part on a downlink reference signal, exploiting channel reciprocity in a time division duplex (TDD) carrier. Determination of the precoding matrix may further be based at least in part on a cross-correlation matrix Rnn or a whitening matrix determined by a scheduling entity. Other aspects, embodiments, and features are also claimed and described.