公开(公告)号：US20190313416A1

公开(公告)日：2019-10-10

申请号：US16046253

申请日：2018-07-26

Applicant: QUALCOMM Incorporated

Inventor： Guttorm Ringstad OPSHAUG ,  Rayman Wai PON ,  Jie WU ,  Naga BHUSHAN ,  Sven FISCHER ,  Stephen William EDGE

IPC: H04W72/08 ,  H04L5/00 ,  H04W72/04 ,  H04W4/02

Abstract: Mobile devices often use orthogonal frequency division multiplexing (OFDM) to calculate position information of mobile devices within the network. However, physical distance between the mobile device and a signal source for positioning and other environmental factors can influence the signal strength of received signals. Received signals at the mobile device that are stronger may drown out the weaker signals, particularly when two signal sources occupy the same symbol. In traditional OFDM, a signal source transmits the same symbol for each positioning occasion, so a weaker signal may never be detected over a stronger signal, reducing the accuracy of the positioning calculations. Described herein are systems and methods for using a pattern to vary the designated symbol for each signal source in a wireless network so that a weaker signal from a signal source may be detected on at least some of the positioning occasions.

公开(公告)号：US20190305901A1

公开(公告)日：2019-10-03

申请号：US16107713

申请日：2018-08-21

Applicant: QUALCOMM Incorporated

Inventor： Guttorm Ringstad OPSHAUG ,  Sven FISCHER ,  Naga BHUSHAN ,  Stephen William EDGE ,  Jie WU ,  Rayman Wai PON

IPC: H04L5/00 ,  H04W64/00 ,  G01S5/10 ,  H04W72/04

Abstract: Methods, apparatuses, and computer-readable media are described. In one example, a method, on a base station, for providing position measurements signals in a wireless communication network, comprises: determining a plurality of subcarriers for downlink transmission, wherein the plurality of subcarriers for downlink transmission comprise all subcarriers indicated in a resource block of a scheduled time of transmission within a scheduled transmission occasion, wherein the resource block comprises a plurality of symbol periods, wherein each symbol period of the plurality of symbol periods is for transmission of a symbol using one or more subcarriers of the plurality of subcarriers; and transmitting at the scheduled time of transmission, and using each subcarrier of the plurality of subcarriers, a wireless position measurement signal at the scheduled transmission occasion, the wireless position measurement signal being part of a sequence of wireless signals representing a position measurement signal bitstream.