公开(公告)号：US20180091237A1

公开(公告)日：2018-03-29

申请号：US15827297

申请日：2017-11-30

申请人： VITAL ALERT COMMUNICATION INC.

发明人： Michael James ROPER ,  Peter KWASNIOK ,  Vladimir PUZAKOV

IPC分类号： H04B13/02 ,  H04W4/22 ,  H04L27/26 ,  H04L25/49 ,  H04B1/40 ,  H01Q1/22 ,  H04B1/38 ,  H04B1/034 ,  H01Q7/00 ,  H01Q1/27

CPC分类号： H04B13/02 ,  H01Q1/2291 ,  H01Q1/273 ,  H01Q7/00 ,  H04B1/034 ,  H04B1/38 ,  H04B1/3827 ,  H04B1/40 ,  H04L25/4902 ,  H04L27/26 ,  H04L27/2602 ,  H04W4/90

摘要： There is provided a Through the Earth Emergency Radio (TER) method and apparatus for creating a communications link that can penetrate the earth or other thick, solid barriers. The communication link is used to connect mobile radios or other conventional wireless devices located below ground and on the surface. The through the earth communication link uses a multi-carrier modulation method that minimizes the impact of AC power line noise by locating each carrier between the harmonic frequencies of the AC power line noise.

公开(公告)号：US20190383619A1

公开(公告)日：2019-12-19

申请号：US16469389

申请日：2017-12-20

申请人： VITAL ALERT COMMUNICATION INC.

发明人： Michael James ROPER ,  Peter KWASNIOK ,  Maxim RALCHENKO

IPC分类号： G01C21/20 ,  G01D5/12 ,  G01R33/10

摘要： Embodiments described herein relate to a magnetic positioning system and method that allows the position of a receiver to be determined in environments containing conducting material such as concrete. A number of transmitters create modulated magnetic fields which are distorted as they propagate through the conducting materials. A finite difference time domain (FDTD) simulation of the environment is used to generate an accurate model of the fields within the environment. A receiver is used to measure the field strength of each transmitter. The receiver position is determined by evaluating the misfit between the received fields and the values in the FDTD model.

公开(公告)号：US20170187471A1

公开(公告)日：2017-06-29

申请号：US15304892

申请日：2015-04-24

申请人： VITAL ALERT COMMUNICATION INC.

发明人： Michael James ROPER ,  Peter KWASNIOK ,  Vladimir PUZAKOV

IPC分类号： H04B13/02 ,  H01Q1/22 ,  H04W4/22 ,  H01Q7/00 ,  H04B1/034 ,  H04L27/26

CPC分类号： H04B13/02 ,  H01Q1/2291 ,  H01Q1/273 ,  H01Q7/00 ,  H04B1/034 ,  H04B1/38 ,  H04B1/3827 ,  H04B1/40 ,  H04L25/4902 ,  H04L27/26 ,  H04L27/2602 ,  H04W4/90

摘要： There is provided a Through the Earth Emergency Radio (TER) method and apparatus for creating a communications link that can penetrate the earth or other thick, solid barriers. The communication link is used to connect mobile radios or other conventional wireless devices located below ground and on the surface. The through the earth communication link uses a multi-carrier modulation method that minimizes the impact of AC power line noise by locating each carrier between the harmonic frequencies of the AC power line noise.