Results 41 - 50 of 131

• Application of Extreme Power Line Communication Methods to Mine Environments
  7/16/2016 - Contracts and cooperative agreements
  A contract to assess the suitability of current power line communication methods (used in nonmining applications) for underground coal mine communication, using mine electrical power distribution conductors as a system backbone.
• Advanced Software Radio Techniques for Improved Range and Reliability of Digital Through-the-Earth Communication Systems
  7/16/2016 - Contracts and cooperative agreements
  A contract to develop an Advanced Software Radio (ASR) for through-the-earth communication with the intent of significantly improving realiability of TTE links in the working areas of coal mines and extending range.
• Resource Identification for Improvement of Electromagnetic Compatibility (EMC) in Underground Coal Mines
  4/29/2016 - Contracts and cooperative agreements
  A contract to identify possible electromagnetic interference requirements for coal mining equipment to ensure proper operation of equipment used in mines with a view towards maximizing mine safety.
• Through-the-Earth Communication Antenna Feasibility Demonstration
  11/20/2015 - Contracts and cooperative agreements
  A contract to develop new antenna configurations to improve performance and utility of through-the-earth (TTE) communications systems once deployed in underground coal mines.
• Through-the-Earth (TTE) Communications: Range Reliability Improvements
  11/20/2015 - Contracts and cooperative agreements
  A contract to develop and test an enhanced magnetics-based communications waveform with increased ability to provide communications in the presence of ambient noise and interference in order to extend existing magnetics-based technologies.
• Through-the-earth Communications Technologies Available
  8/18/2015 - News and announcements
  A feature story about through-the-earth communcations technologies available for mine emergencies.
• Medium Frequency Propagation Characteristics of Different Transmission Lines in an Underground Coal Mine
  2/1/2015 - Peer reviewed journal articles
  In this study, the propagation characteristics of three types of medium frequency transmission lines in two layouts were obtained in an effort to understand the propagation characteristics of different transmission lines in different locations.
• A Hybrid Approach for Efficient Modeling of Medium-Frequency Propagation in Coal Mines
  2/1/2015 - Peer reviewed journal articles
  An article introducing a hybrid approach to modeling medium-frequency communications in coal mines.
• Radio System Modifications for Improved Mine Safety (Medium Frequency)
  11/19/2014 - Contracts and cooperative agreements
  A contract to increase the performance of medium frequency communications in underground mines.
• Through-the-Earth Communication Systems for Underground Coal Mines: Product Final Development and Standardized Interface Definition
  10/6/2014 - Contracts and cooperative agreements
  A contract to extend the operational range of a through-the-earth communications system while maintaining the portability and permissibility of the subsurface unit.