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1. (WO2018140321) FLEXIBLE COMB-BASED REFERENCE SIGNALS

Pub. No.:    WO/2018/140321    International Application No.:    PCT/US2018/014487
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Sat Jan 20 00:59:59 CET 2018
IPC: H04B 7/06
H04L 5/00
H04W 72/04
H04B 7/0404
H04B 7/0413
Applicants: QUALCOMM INCORPORATED
Inventors: WANG, Renqiu
HUANG, Yi
XU, Hao
ZENG, Wei
GAAL, Peter
Title: FLEXIBLE COMB-BASED REFERENCE SIGNALS
Abstract:
Multiple-input, multiple-output (MIMO) devices and non-MIMO devices may implement a flexible comb-based design for transmission of reference signals, such as demodulation reference signals (DMRSs). User equipment (UEs) of different ranks may use the flexible comb-based design to transmit the reference signals in a common comb pattern within an allocated bandwidth. UEs using as many antenna ports as combs in the common comb pattern may transmit a different reference signal using a different antenna port over each comb, while UEs using fewer antenna ports than combs may concatenate combs, so that the UEs may transmit a reference signal using a single antenna port over multiple combs. Using the flexible comb-based design, a base station may be capable of better manage inter-cell interference and multiplexing of different rank UEs in shared resource blocks (RBs) may be supported.