公开(公告)号：US20140269768A1

公开(公告)日：2014-09-18

申请号：US13826014

申请日：2013-03-14

Applicant: QUALCOMM INCORPORATED

Inventor： Sameer Vermani ,  Bin Tian ,  Albert va Zelst

IPC: H04B7/06 ,  H04L29/06

CPC classification number: H04L69/22 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/068 ,  H04B7/12

Abstract: Certain aspects of the present disclosure provide methods and apparatus for obtaining second-order downlink spatial diversity within a wireless communication system in accordance with IEEE 802.11ah, for example. One example method generally includes generating a frame comprising a preamble having at least one field, replicating at least one bit of the at least one field to form a replica of the at least one bit, transmitting the at least one bit via a first antenna, and transmitting the replica of the at least one bit via a second antenna. Another example method generally includes generating at least two space-time streams; transmitting, via a first pair of antennas, the at least two space-time streams in a first frequency band; and transmitting, via a second pair of antennas, the at least two space-time streams in a second frequency band.

Abstract translation: 本公开的某些方面提供了例如根据IEEE 802.11ah在无线通信系统内获得二阶下行链路空间分集的方法和装置。 一个示例性方法通常包括生成包括具有至少一个场的前同步码的帧，复制至少一个场的至少一个比特以形成至少一个比特的副本，经由第一天线发射该至少一个比特， 以及经由第二天线发送所述至少一个比特的副本。 另一示例性方法通常包括生成至少两个时空流; 经由第一对天线在第一频带中发送所述至少两个空时流; 以及经由第二对天线在所述第二频带中发送所述至少两个时空流。