公开(公告)号：US20170295000A1

公开(公告)日：2017-10-12

申请号：US15460079

申请日：2017-03-15

Applicant: QUALCOMM INCORPORATED

Inventor： TAESANG YOO ,  ZHIFEI FAN ,  WEILIANG ZENG ,  JING SUN ,  JUAN MONTOJO

IPC: H04L5/00 ,  H04L27/26 ,  H04B17/336

CPC classification number: H04L5/0048 ,  H04B17/336 ,  H04J13/004 ,  H04L5/0007 ,  H04L5/0026 ,  H04L5/005 ,  H04L5/026 ,  H04L27/2613 ,  H04L27/2636

Abstract: Methods, systems, and devices for wireless communication are described. A base station may multiplex reference signal (RS) transmissions for different antenna ports over a set of resource elements using a code division multiplexing (CDM) group spreading in a time dimension and a frequency dimension. The base station may transmit the RS transmissions over the set of resource elements based at least in part on the multiplexing to a user equipment (UE). The UE may demultiplex the RS transmissions based at least in part on a CDM group and may select at least one of the time dimension or the frequency dimension over which to demultiplex the RS transmissions based on a determination or other information.

公开(公告)号：US20130259173A1

公开(公告)日：2013-10-03

申请号：US13762206

申请日：2013-02-07

Applicant: QUALCOMM INCORPORATED

Inventor： NICOLA VARANESE ,  CHRISTIAN PIETSCH ,  JUAN MONTOJO

IPC: H04L1/00 ,  H04L25/02

CPC classification number: H04L25/022 ,  H04L1/0001 ,  H04L25/0232 ,  H04L27/2613 ,  H04L27/2647 ,  H04L27/3854 ,  H04L27/3863 ,  H04L27/3872 ,  H04L2027/003 ,  H04L2027/0073 ,  H04L2027/0089 ,  H04L2027/0093 ,  H04L2027/0095

Abstract: A receiver receives a repeating or periodic signal and, based on the signal, estimates a carrier frequency offset for the receiver. Based on the signal and the estimated carrier offset, an I/O mismatch for the receiver is estimated and compensation for the estimated I/O mismatch is performed. After compensating for the estimated receiver I/O mismatch, the carrier frequency offset is re-estimated.

Abstract translation: 接收机接收重复或周期性信号，并且基于该信号估计接收机的载波频率偏移。 基于信号和估计的载波偏移，估计接收机的I / O不匹配，并执行估计的I / O失配的补偿。 在补偿估计的接收机I / O不匹配之后，重新估计载波频率偏移。