MXPA06000254A - Radio por tierra. - Google Patents

Radio por tierra.

Info

Publication number
MXPA06000254A
MXPA06000254A MXPA06000254A MXPA06000254A MXPA06000254A MX PA06000254 A MXPA06000254 A MX PA06000254A MX PA06000254 A MXPA06000254 A MX PA06000254A MX PA06000254 A MXPA06000254 A MX PA06000254A MX PA06000254 A MXPA06000254 A MX PA06000254A
Authority
MX
Mexico
Prior art keywords
analog
output
digital
converter
signal
Prior art date
Application number
MXPA06000254A
Other languages
English (en)
Inventor
Jose Vazquez-Dominguez
Original Assignee
Univ California
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ California filed Critical Univ California
Publication of MXPA06000254A publication Critical patent/MXPA06000254A/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
    • H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy

Abstract

Un metodo y aparato para comunicacion por tierra efectiva incluye un dispositivo de entrada de senal conectado a un transmisor que opera a una frecuencia predeterminada, suficientemente baja, para penetrar distancias utiles por tierra, y teniendo un convertidor analogo a digital que recibe la entrada de senal y que pasa la entrada de senal a un circuito de compresion de datos que se conecta a un procesador de codificacion, la salida del procesador de codificacion proporcionandose a un convertidor digital a analogo. Un amplificador recibe la salida analoga del convertidor digital a analogo para amplificar dicha salida analoga y emitir dicha salida analoga a una antena. Un receptor teniendo una antena recibe la salida analoga, pasa la senal analoga a un filtro de paso de banda cuya salida se conecta a un convertidor analogo a digital que proporciona una senal digital a un procesador de decodificacion cuya salida se conecta a un compresor de datos, el compresor de datos proporcionando una senal digital descomprimida a un convertidor digital a analogo. Un dispositivo de salida de audio recibe la salida analoga del convertidor digital a analogo para producir salida audible.
MXPA06000254A 2003-06-26 2004-06-08 Radio por tierra. MXPA06000254A (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US48314603P 2003-06-26 2003-06-26
US10/719,426 US7043204B2 (en) 2003-06-26 2003-11-20 Through-the-earth radio
PCT/US2004/018355 WO2005002066A2 (en) 2003-06-26 2004-06-08 Through-the-earth radio

Publications (1)

Publication Number Publication Date
MXPA06000254A true MXPA06000254A (es) 2006-03-30

Family

ID=33544631

Family Applications (1)

Application Number Title Priority Date Filing Date
MXPA06000254A MXPA06000254A (es) 2003-06-26 2004-06-08 Radio por tierra.

Country Status (10)

Country Link
US (2) US7043204B2 (es)
EP (1) EP1636972B1 (es)
CN (1) CN1879392B (es)
AU (1) AU2004253118B2 (es)
CA (1) CA2531036C (es)
HK (1) HK1094293A1 (es)
IL (1) IL172827A (es)
MX (1) MXPA06000254A (es)
NZ (1) NZ544992A (es)
WO (1) WO2005002066A2 (es)

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US8305227B2 (en) * 2005-06-15 2012-11-06 Wfs Technologies Ltd. Wireless auxiliary monitoring and control system for an underwater installation
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WO2007068918A1 (en) * 2005-12-14 2007-06-21 Wireless Fibre Systems Ltd Distributed underwater electromagnetic communication system
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GB0613081D0 (en) * 2006-07-03 2006-08-09 Wireless Fibre Systems Ltd Underground data communications system
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US7796943B2 (en) * 2007-03-28 2010-09-14 Lockheed Martin Corporation Sub-surface communications system and method
CN101064570B (zh) * 2007-04-18 2013-07-24 白坤生 电信号传输方法及其装置
US8725188B1 (en) 2007-07-20 2014-05-13 Kutta Technologies, Inc. Enclosed space communication systems and related methods
US7843768B2 (en) 2008-04-11 2010-11-30 Squire James C System for communicating location of survivors in mine emergencies
US7903041B2 (en) * 2008-05-01 2011-03-08 Lockheed Martin Corporation Magnetic antenna apparatus and method for generating a magnetic field
US20100015918A1 (en) * 2008-07-18 2010-01-21 Ferro Solutions, Inc. Wireless transfer of information using magneto-electric devices
US8885559B2 (en) 2009-03-20 2014-11-11 Innovative Wireless Technologies, Inc. Method and apparatus for reliable communications in underground and hazardous areas
US9179475B2 (en) 2009-03-20 2015-11-03 Innovative Wireless Technologies, Inc. Distributed ad hoc mesh network protocol for underground mine and hazardous area communications
EP2438698A4 (en) * 2009-06-03 2015-10-14 Marshall Radio Telemetry Inc SYSTEMS AND METHODS FOR COMMUNICATIONS THROUGH EARTH
US20110217925A1 (en) * 2010-03-08 2011-09-08 Mark Rhodes Noise reducing near-field receiver antenna and system
US8886117B1 (en) 2010-03-08 2014-11-11 The Board Of Trustees Of The University Of Alabama For And On Behalf Of The University Of Alabama Through-the-earth (TTE) communication systems and methods
CA2805659A1 (en) * 2010-07-16 2012-01-19 Vital Alert Communication Portable through-the-earth radio
US8670708B2 (en) * 2010-09-29 2014-03-11 E-Spectrum Technologies, Incorporated Portable wireless through-the-earth communication system
US10020895B2 (en) * 2011-06-22 2018-07-10 David H. Parker Methods and apparatus for emergency mine communications using acoustic waves, time synchronization, and digital signal processing
AU2013218760B2 (en) * 2012-02-08 2016-11-03 Vital Alert Communication Inc. System, method and apparatus for controlling buried devices
GB201303328D0 (en) 2013-02-25 2013-04-10 Wfs Technologies Ltd Underwater communication network
US9866333B2 (en) * 2014-04-25 2018-01-09 Vital Alert Communication Inc. Through-the-earth emergency radio system
US9356706B2 (en) * 2014-05-05 2016-05-31 Stolar, Inc. First responder and mine emergency communication
US9739140B2 (en) * 2014-09-05 2017-08-22 Merlin Technology, Inc. Communication protocol in directional drilling system, apparatus and method utilizing multi-bit data symbol transmission
CN105763852A (zh) * 2016-04-06 2016-07-13 华东师范大学 一种无线高清视频实时传输方法及装置
CN107040936B (zh) * 2017-03-24 2020-12-18 承德路桥建设总公司 公路隧道甚低频透地通讯—定位一体化系统
KR102302562B1 (ko) * 2020-03-19 2021-09-16 엠케이에스 인베스트먼츠 다운홀 음향 원격 측정 방법 및 장치

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Also Published As

Publication number Publication date
EP1636972A4 (en) 2008-03-19
CA2531036A1 (en) 2005-01-06
NZ544992A (en) 2007-07-27
EP1636972B1 (en) 2014-08-06
IL172827A0 (en) 2006-06-11
IL172827A (en) 2011-09-27
AU2004253118B2 (en) 2009-10-08
WO2005002066A3 (en) 2005-12-29
AU2004253118A1 (en) 2005-01-06
EP1636972A2 (en) 2006-03-22
CN1879392B (zh) 2013-04-03
CA2531036C (en) 2013-10-15
CN1879392A (zh) 2006-12-13
US7043204B2 (en) 2006-05-09
HK1094293A1 (en) 2007-03-23
US20040266497A1 (en) 2004-12-30
WO2005002066A2 (en) 2005-01-06
US20060148514A1 (en) 2006-07-06
US7149472B2 (en) 2006-12-12

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